Mannan binding lectin serine peptidase 2 (MASP2) IRNA compositions and methods of use thereof

[0001] This application claims the benefit of priority to U.S. Provisional Application No. 62/978,788, filed on Feb. 19, 2020. The entire contents of the foregoing application is hereby incorporated herein by reference.

[0002] The instant application contains a Sequence Listing which has been submitted electronically in ASCII format and is hereby incorporated by reference in its entirety. The ASCII copy, created on Feb. 12, 2021, is named A108868_1020 WO_SL.txt and is 356,834 bytes in size.

[0003] The complement system consists of more than 30 proteins that are either present as soluble proteins in the blood or are present as membrane-associated proteins. Activation of complement leads to a sequential cascade of enzymatic reactions, known as complement activation pathways that elicit a plethora of physiological responses that range from chemoattraction to apoptosis. Initially, complement was thought to play a major role in innate immunity where a robust and rapid response is mounted against invading pathogens. However, recently it is becoming increasingly evident that complement also plays an important role in adaptive immunity involving T and B cells that help in elimination of pathogens, in maintaining immunologic memory preventing pathogenic re-invasion, and is involved in numerous human pathological states.

[0004] Complement activation is known to occur through three different pathways: alternate, classical and lectin involving proteins that mostly exist as inactive zymogens that are then sequentially cleaved and activated.

[0005] The mannan binding lectin serine peptidase 2 (MASP2) gene, encoding the protein MASP2, is involved in the lectin pathway of the complement system. The MASP2 gene is located on chromosome 1p36.23-31 and belongs to the peptidase 51 family of serine proteases. Two gene products are encoded by the MASP2 gene, a 76 kDa serine protease, MASP2 (long isoform), which is highly expressed in the liver, and a 19 kDa alternative splice product, Map19 (short isoform), which is present in plasma. MASP2 cleaves complement components C2 and C4 to form the C3 convertase in the lectin complement activation pathway. MASP2 is also involved in the coagulation cascade by cleaving prothrombin to generate thrombin.

[0006] Inappropriate activation of components of the complement system, including MASP2, is responsible for propagating and/or initiating pathology in many different diseases, including, for example, arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy. Accordingly, there is a need for agents that can selectively and efficiently inhibit expression of the MASP2 gene such that subjects having a MASP2-associated disorder can be effectively treated.

[0007] The present invention provides iRNA compositions which affect the RNA-induced silencing complex (RISC)-mediated cleavage of RNA transcripts of a gene encoding mannan binding lectin serine peptidase 2 (MASP2). The MASP2 may be within a cell, e.g., a cell within a subject, such as a human subject.

[0008] In an aspect, the invention provides a double stranded ribonucleic acid (dsRNA) agent for inhibiting expression of MASP2 in a cell, wherein the dsRNA agent comprises a sense strand and an antisense strand forming a double stranded region, wherein the sense strand comprises at least 15 contiguous nucleotides differing by no more than 0, 1, 2, or 3 nucleotides from the nucleotide sequence of SEQ ID NOs:1, 3 or 5 and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 1, 2, or 3 nucleotides from the nucleotide sequence of SEQ ID NOs:2, 4 or 6.

[0009] In another aspect, the present invention provides a double stranded ribonucleic acid (dsRNA) for inhibiting expression of MASP2 in a cell, wherein said dsRNA comprises a sense strand and an antisense strand forming a double stranded region, wherein the antisense strand comprises a region of complementarity to an mRNA encoding MASP2, and wherein the region of complementarity comprises at least 15 contiguous nucleotides differing by no more than 0, 1, 2, or 3 nucleotides from any one of the antisense nucleotide sequences in any one of Tables 2-7.

[0010] In one aspect, the present invention provides a double stranded ribonucleic acid (dsRNA) for inhibiting expression of MASP2 in a cell, wherein said dsRNA comprises a sense strand and an antisense strand forming a double stranded region, wherein the sense strand comprises

• • [0011] (a) at least 15 contiguous nucleotides differing by no more than three nucleotides from any one of the nucleotide sequence of nucleotides 3-23, 21-41, 39-59, 57-77, 76-96, 94-114, 112-132, 130-150, 148-168, 166-186, 184-204, 203-223, 221-241, 239-259, 257-277, 275-295, 293-313, 312-332, 330-350, 348-368, 366-386, 384-404, 402-422, 420-440, 439-459, 457-477, 475-495, 493-513, 511-531, 529-549, 547-567, 566-586, 584-604, 602-622, 620-640, 638-658, 656-676, 675-695, 693-713, 711-731, 729-749, 747-767, 765-785, 783-803, 802-822, 820-840, 838-858, 856-876, 874-894, 892-912, 910-930, 929-949, 947-967, 965-985, 983-1003, 1001-1021, 1019-1039, 1038-1058, 1056-1076, 1074-1094, 1092-1112, 1110-1130, 1128-1148, 1146-1166, 1165-1185, 1183-1203, 1201-1221, 1219-1239, 1237-1257, 1255-1275, 1273-1293, 1292-1312, 1310-1330, 1328-1348, 1346-1366, 1364-1384, 1382-1402, 1400-1420, 1419-1439, 1437-1457, 1455-1475, 1473-1493, 1491-1511, 1509-1529, 1528-1548, 1546-1566, 1564-1584, 1582-1602, 1600-1620, 1618-1638, 1636-1656, 1655-1675, 1673-1693, 1691-1711, 1709-1729, 1727-1747, 1745-1765, 1763-1783, 1782-1802, 1800-1820, 1818-1838, 1836-1856, 1854-1874, 1872-1892, 1891-1911, 1909-1929, 1927-1947, 1945-1965, 1963-1983, 1981-2001, 1999-2019, 2018-2038, 2036-2056, 2054-2074, 2072-2092, 2090-2110, 2108-2128, 2126-2146, 2145-2165, 2163-2183, 2181-2201, 2199-2219, 2217-2237, 2235-2255, 2254-2274, 2272-2292, 2290-2310, 2308-2328, 2326-2346, 2344-2364, 2362-2382, 2381-2401, 2399-2419, 2417-2437 or 2435-2455 of the nucleotide sequence of SEQ ID NO:1, and the antisense strand comprises at least 19 contiguous nucleotides from the corresponding nucleotide sequence of SEQ ID NO:2; (b) at least 15 contiguous nucleotides differing by no more than three nucleotides from any one of the nucleotide sequence of nucleotides 1263-1283, 1190-1210, 1191-1211, 1078-1098, 1270-1290, 885-905, 761-781, 1255-1275, 1279-1299, 1197-1217, 1021-1041, 704-724, 1968-1988, 1277-1297, 1204-1224, 1193-1213, 1201-1221, 1390-1410, 1272-1292, 1282-1302, 959-979, 1199-1219, 1620-1640, 1806-1826, 1783-1803, 1623-1643, 1397-1417, 1782-1802, 1777-1797, 1490-1510, 1712-1732, 1676-1696, 1353-1373, 2189-2209, 1438-1458, 1820-1840, 1664-1684, 1386-1406, 1665-1685, 1282-1302, 1864-1884, 1785-1805, 2333-2353, 1779-1799, 1351-1371, 1350-1370, 1031-1051, 2046-2066, 1616-1636, 2372-2392, 1667-1687, 1675-1695, 1780-1800, 1541-1561, 1551-1571, 1399-1419, 1701-1721, 1715-1735, 1700-1720, 1668-1688, 1366-1386, 2191-2211, 2374-2394, 1400-1420, 1314-1334, 1821-1841, 1807-1827, 1652-1672, 2129-2149, 1778-1798, 1702-1722, 1404-1424, 1593-1613, 1773-1793, 2373-2393, 1545-1565, 1812-1832, 1677-1697, 1359-1379, 1663-1683, 1365-1385, 2194-2214, 1393-1413, 1621-1641, 1673-1693, 1594-1614, 1387-1407, 1542-1562, 1972-1992, 1550-1570, 1323-1343, 1357-1377, 1360-1380, 1711-1731, 1830-1850, 1781-1801, 1405-1425, 2122-2142, 1437-1457, 1973-1993, 2379-2399, 1398-1418, 1669-1689, 1355-1375, 2196-2216, 1320-1340, 1407-1427, 1862-1882, 1666-1686, 1354-1374, 1974-1994, 1662-1682 or 1653-1673 of the nucleotide sequence of SEQ ID NO:3, and the antisense strand comprises at least 19 contiguous nucleotides from the corresponding nucleotide sequence of SEQ ID NO:4; or (c) at least 15 contiguous nucleotides differing by no more than three nucleotides from any one of the nucleotide sequence of nucleotides 363-383, 543-563, 437-457, 93-113, 243-263, 144-164, 85-105, 257-277, 435-455, 358-378, 26-46 or 344-364 of the nucleotide sequence of SEQ ID NO:5, and the antisense strand comprises at least 19 contiguous nucleotides from the corresponding nucleotide sequence of SEQ ID NO:6.

[0012] In one embodiment, the antisense strand comprises at least 15 contiguous nucleotides differing by nor more than 0, 1, 2, or 3 nucleotides from any one of the antisense strand nucleotide sequences of a duplex selected from the group consisting of AD-1143337, AD-1143348, AD-155520, AD-1143374, AD-1144836, AD-1143386, AD-1144837, AD-1144838, AD-1143406, AD-1143416, AD-1144839, AD-155599, AD-1143442, AD-155635, AD-1143470, AD-1144840, AD-1143479, AD-1143498, AD-1144841, AD-1143511, AD-1143523, AD-1143538, AD-1144842, AD-1143554, AD-1143570, AD-1144843, AD-1144844, AD-1143594, AD-155809, AD-1143619, AD-1143635, AD-1143649, AD-1143662, AD-1144845, AD-1143677, AD-1143691, AD-155927, AD-1144846, AD-155946, AD-1143731, AD-1143748, AD-155999, AD-1143774, AD-1143789, AD-1143802, AD-1144847, AD-1143816, AD-1143828, AD-1143845, AD-1143860, AD-156136, AD-1143891, AD-1143904, AD-1143919, AD-156208, AD-1143945, AD-1143957, AD-1144848, AD-156260, AD-1143982, AD-1144849, AD-156308, AD-1144019, AD-1144035, AD-1144050, AD-1144065, AD-1144077, AD-1144092, AD-1144105, AD-1144117, AD-156460, AD-156477, AD-156495, AD-1144173, AD-156531, AD-1144205, AD-1144217, AD-156584, AD-1144246, AD-1144257, AD-156639, AD-1144284, AD-1144299, AD-1144313, AD-156712, AD-1144343, AD-156748, AD-1144365, AD-1144376, AD-1144391, AD-1144850, AD-156832, AD-1144424, AD-1144440, AD-1144453, AD-1144466, AD-1144851, AD-1144852, AD-1144481, AD-1144494, AD-156962, AD-1144522, AD-1144853, AD-1144534, AD-1144854, AD-1144548, AD-1144855, AD-1144565, AD-1144578, AD-1144856, AD-1144857, AD-1144591, AD-1144604, AD-1144614, AD-1144858, AD-1144631, AD-1144640, AD-1144654, AD-1144669, AD-1144682, AD-157219, AD-1144859, AD-1144708, AD-1144718, AD-157273, AD-1144860, AD-1144745, AD-1144758, AD-1144771, AD-1144781, AD-1144793, AD-1144803, AD-157398, AD-157416, AD-1144861, AD-156804.1, AD-156950.1, AD-156927.1, AD-156807.1, AD-156581.1, AD-156926.1, AD-156921.1, AD-156674.1, AD-156889.1, AD-156853.1, AD-156538.1, AD-157227.1, AD-156622.1, AD-156964.1, AD-156841.1, AD-156571.1, AD-156842.1, AD-68457.2, AD-156990.1, AD-156929.1, AD-157334.1, AD-156923.1, AD-156536.1, AD-156535.1, AD-156255.1, AD-157093.1, AD-156800.1, AD-157371.1, AD-156844.1, AD-156852.1, AD-156924.1, AD-156725.1, AD-156735.1, AD-156583.1, AD-156878.1, AD-156892.1, AD-156877.1, AD-156845.1, AD-156551.1, AD-157229.1, AD-157373.1, AD-156584.1, AD-156499.1, AD-156965.1, AD-156951.1, AD-156829.1, AD-157167.1, AD-156922.1, AD-156879.1, AD-156588.1, AD-156777.1, AD-156917.1, AD-157372.1, AD-156729.1, AD-156956.1, AD-156854.1, AD-156544.1, AD-156840.1, AD-156550.1, AD-157232.1, AD-156577.1, AD-156805.1, AD-156850.1, AD-156778.1, AD-156572.1, AD-156726.1, AD-157059.1, AD-156734.1, AD-156508.1, AD-156542.1, AD-156545.1, AD-156888.1, AD-156974.1, AD-156925.1, AD-156589.1, AD-157160.1, AD-156621.1, AD-157060.1, AD-157378.1, AD-156582.1, AD-156846.1, AD-156540.1, AD-157234.1, AD-156505.1, AD-156591.1, AD-156988.1, AD-156843.1, AD-156539.1, AD-157061.1, AD-156839.1, AD-156830.1, AD-68438.1, AD-68439.1, AD-68440.1, AD-68441.1, AD-68442.1, AD-68443.1, AD-68444.1, AD-68445.1, AD-68446.1, AD-68447.1, AD-68448.1, AD-68449.1, AD-68450.1, AD-68451.1, AD-68452.1, AD-68453.1, AD-68454.1, AD-68455.1, AD-68456.1, AD-68457.1, AD-68458.1, AD-68459.1, AD-68460.1, AD-68461.1, AD-68462.1, AD-68463.1, AD-68464.1, AD-68465.1, AD-68466.1, AD-68467.1, AD-68468.1, AD-68469.1, AD-68470.1 and AD-68471.1.

[0013] In one embodiment, the dsRNA agent comprises at least one modified nucleotide.

[0014] In one embodiment, substantially all of the nucleotides of the sense strand; substantially all of the nucleotides of the antisense strand comprise a modification; or substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand comprise a modification.

[0015] In one embodiment, all of the nucleotides of the sense strand comprise a modification; all of the nucleotides of the antisense strand comprise a modification; or all of the nucleotides of the sense strand and all of the nucleotides of the antisense strand comprise a modification.

[0016] In one embodiment, at least one of the modified nucleotides is selected from the group consisting of a deoxy-nucleotide, a 3′-terminal deoxythimidine (dT) nucleotide, a 2′-O-methyl modified nucleotide, a 2′-fluoro modified nucleotide, a 2′-deoxy-modified nucleotide, a locked nucleotide, an unlocked nucleotide, a conformationally restricted nucleotide, a constrained ethyl nucleotide, an abasic nucleotide, a 2′-amino-modified nucleotide, a 2′-O-allyl-modified nucleotide, 2′-C-alkyl-modified nucleotide, 2′-hydroxyl-modified nucleotide, a 2′-methoxyethyl modified nucleotide, a 2′-O-alkyl-modified nucleotide, a morpholino nucleotide, a phosphoramidate, a non-natural base comprising nucleotide, a tetrahydropyran modified nucleotide, a 1,5-anhydrohexitol modified nucleotide, a cyclohexenyl modified nucleotide, a nucleotide comprising a phosphorothioate group, a nucleotide comprising a methylphosphonate group, a nucleotide comprising a 5′-phosphate, a nucleotide comprising a 5′-phosphate mimic, a thermally destabilizing nucleotide, a glycol modified nucleotide (GNA), and a 2-O—(N-methylacetamide) modified nucleotide; and combinations thereof.

[0017] In one embodiment, the modifications on the nucleotides are selected from the group consisting of LNA, HNA, CeNA, 2′-methoxyethyl, 2′-O-alkyl, 2′-O-allyl, 2′-C-allyl, 2′-fluoro, 2′-deoxy, 2′-hydroxyl, and glycol; and combinations thereof.

[0018] In one embodiment, at least one of the modified nucleotides is selected from the group consisting of a deoxy-nucleotide, a 2′-O-methyl modified nucleotide, a 2′-fluoro modified nucleotide, a 2′-deoxy-modified nucleotide, a glycol modified nucleotide (GNA), e.g., Ggn, Cgn, Tgn, or Agn, and, a vinyl-phosphonate nucleotide; and combinations thereof.

[0019] In another embodiment, at least one of the modifications on the nucleotides is a thermally destabilizing nucleotide modification.

[0020] In one embodiment, the thermally destabilizing nucleotide modification is selected from the group consisting of an abasic modification; a mismatch with the opposing nucleotide in the duplex; and destabilizing sugar modification, a 2′-deoxy modification, an acyclic nucleotide, an unlocked nucleic acids (UNA), and a glycerol nucleic acid (GNA)

[0021] The double stranded region may be 19-30 nucleotide pairs in length; 19-25 nucleotide pairs in length; 19-23 nucleotide pairs in length; 23-27 nucleotide pairs in length; or 21-23 nucleotide pairs in length.

[0022] In one embodiment, each strand is independently no more than 30 nucleotides in length.

[0023] In one embodiment, the sense strand is 21 nucleotides in length and the antisense strand is 23 nucleotides in length.

[0024] The region of complementarity may be at least 17 nucleotides in length; between 19 and 23 nucleotides in length; or 19 nucleotides in length.

[0025] In one embodiment, at least one strand comprises a 3′ overhang of at least 1 nucleotide. In another embodiment, at least one strand comprises a 3′ overhang of at least 2 nucleotides.

[0026] In one embodiment, the dsRNA agent further comprises a ligand.

[0027] In one embodiment, the ligand is conjugated to the 3′ end of the sense strand of the dsRNA agent.

[0028] In one embodiment, the ligand is an N-acetylgalactosamine (GalNAc) derivative.

[0029] In one embodiment, the ligand is one or more GalNAc derivatives attached through a monovalent, bivalent, or trivalent branched linker.

[0030] In one embodiment, the ligand is

[0031]

[0032] In one embodiment, the dsRNA agent is conjugated to the ligand as shown in the following schematic

[0033]
and, wherein X is O or S.

[0034] In one embodiment, the X is O.

[0035] In one embodiment, the dsRNA agent further comprises at least one phosphorothioate or methylphosphonate internucleotide linkage.

[0036] In one embodiment, the phosphorothioate or methylphosphonate internucleotide linkage is at the 3′-terminus of one strand, e.g., the antisense strand or the sense strand.

[0037] In another embodiment, the phosphorothioate or methylphosphonate internucleotide linkage is at the 5′-terminus of one strand, e.g., the antisense strand or the sense strand.

[0038] In one embodiment, the phosphorothioate or methylphosphonate internucleotide linkage is at the both the 5′- and 3′-terminus of one strand. In one embodiment, the strand is the antisense strand.

[0039] In one embodiment, the base pair at the 1 position of the 5′-end of the antisense strand of the duplex is an AU base pair.

[0040] The present invention also provides cells containing any of the dsRNA agents of the invention and pharmaceutical compositions comprising any of the dsRNA agents of the invention.

[0041] The pharmaceutical composition of the invention may include dsRNA agent in an unbuffered solution, e.g., saline or water, or the pharmaceutical composition of the invention may include the dsRNA agent is in a buffer solution, e.g., a buffer solution comprising acetate, citrate, prolamine, carbonate, or phosphate or any combination thereof; or phosphate buffered saline (PBS).

[0042] In one aspect, the present invention provides a method of inhibiting expression of a MASP2 gene in a cell. The method includes contacting the cell with any of the dsRNAs of the invention or any of the pharmaceutical compositions of the invention, thereby inhibiting expression of the MASP2 gene in the cell.

[0043] In one embodiment, the cell is within a subject, e.g., a human subject, e.g., a subject having a MASP2-associated disorder, such as a MASP2-associated disorder selected from the group consisting of arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0044] In one embodiment, contacting the cell with the dsRNA agent inhibits the expression of MASP2 by at least 50%, 60%, 70%, 80%, 90%, or 95%.

[0045] In one embodiment, inhibiting expression of MASP2 decreases MASP2 protein level in serum of the subject by at least 50%, 60%, 70%, 80%, 90%, or 95%.

[0046] In one aspect, the present invention provides a method of treating a subject having a disorder that would benefit from reduction in MASP2 expression. The method includes administering to the subject a therapeutically effective amount of any of the dsRNAs of the invention or any of the pharmaceutical compositions of the invention, thereby treating the subject having the disorder that would benefit from reduction in MASP2 expression.

[0047] In another aspect, the present invention provides a method of preventing at least one symptom in a subject having a disorder that would benefit from reduction in MASP2 expression. The method includes administering to the subject a prophylactically effective amount of any of the dsRNAs of the invention or any of the pharmaceutical compositions of the invention, thereby preventing at least one symptom in the subject having the disorder that would benefit from reduction in MASP2 expression.

[0048] In one embodiment, the disorder is a MASP2-associated disorder, e.g., a MASP2-associated disorder is selected from the group consisting of arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0049] In one embodiment, the MASP2-associated disorder is IgA nephropathy.

[0050] In one embodiment, the subject is human.

[0051] In one embodiment, the administration of the agent to the subject causes a decrease in inflammation and/or a decrease in MASP2 protein accumulation.

[0052] In one embodiment, the dsRNA agent is administered to the subject at a dose of about 0.01 mg/kg to about 50 mg/kg.

[0053] In one embodiment, the dsRNA agent is administered to the subject subcutaneously.

[0054] In one embodiment, the methods of the invention include further determining the level of MASP2 in a sample(s) from the subject.

[0055] In one embodiment, the level of MASP2 in the subject sample(s) is a MASP2 protein level in a blood or serum sample(s).

[0056] In one embodiment, the methods of the invention further include administering to the subject an additional therapeutic agent for treatment of inflammation.

[0057] The present invention also provides kits comprising any of the dsRNAs of the invention or any of the pharmaceutical compositions of the invention, and optionally, instructions for use.

[0058] The present invention provides iRNA compositions which effect the RNA-induced silencing complex (RISC)-mediated cleavage of RNA transcripts of a MASP2 gene. The gene may be within a cell, e.g., a cell within a subject, such as a human. The use of these iRNAs enables the targeted degradation of mRNAs of the corresponding gene (MASP2 gene) in mammals.

[0059] The iRNAs of the invention have been designed to target the human MASP2 gene, including portions of the gene that are conserved in the MASP2 orthologs of other mammalian species. Without intending to be limited by theory, it is believed that a combination or sub-combination of the foregoing properties and the specific target sites or the specific modifications in these iRNAs confer to the iRNAs of the invention improved efficacy, stability, potency, durability, and safety.

[0060] Accordingly, the present invention provides methods for treating and preventing a MASP2-associated disorder, e.g., arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy, using iRNA compositions which effect the RNA-induced silencing complex (RISC)-mediated cleavage of RNA transcripts of a MASP2 gene.

[0061] The iRNAs of the invention include an RNA strand (the antisense strand) having a region which is up to about 30 nucleotides or less in length, e.g., 19-30, 19-29, 19-28, 19-27, 19-26, 19-25, 19-24, 19-23, 19-22, 19-21, 19-20, 20-30, 20-29, 20-28, 20-27, 20-26, 20-25, 20-24, 20-23, 20-22, 20-21, 21-30, 21-29, 21-28, 21-27, 21-26, 21-25, 21-24, 21-23, or 21-22 nucleotides in length, which region is substantially complementary to at least part of an mRNA transcript of a MASP2 gene.

[0062] In certain embodiments, one or both of the strands of the double stranded RNAi agents of the invention is up to 66 nucleotides in length, e.g., 36-66, 26-36, 25-36, 31-60, 22-43, 27-53 nucleotides in length, with a region of at least 19 contiguous nucleotides that is substantially complementary to at least a part of an mRNA transcript of a MASP2 gene. In some embodiments, such iRNA agents having longer length antisense strands may include a second RNA strand (the sense strand) of 20-60 nucleotides in length wherein the sense and antisense strands form a duplex of 18-30 contiguous nucleotides.

[0063] The use of iRNAs of the invention enables the targeted degradation of mRNAs of the corresponding gene (MASP2 gene) in mammals. Using in vitro and in vivo assays, the present inventors have demonstrated that iRNAs targeting a MASP2 gene can potently mediate RNAi, resulting in significant inhibition of expression of a MASP2 gene. Thus, methods and compositions including these iRNAs are useful for treating a subject having a MASP2-associated disorder, e.g., arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0064] Accordingly, the present invention provides methods and combination therapies for treating a subject having a disorder that would benefit from inhibiting or reducing the expression of a MASP2 gene, e.g., a MASP2-associated disease, such as arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy, using iRNA compositions which effect the RNA-induced silencing complex (RISC)-mediated cleavage of RNA transcripts of a MASP2 gene.

[0065] The present invention also provides methods for preventing at least one symptom in a subject having a disorder that would benefit from inhibiting or reducing the expression of a MASP2 gene, e.g., arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0066] For example, in a subject having arthritis, the methods of the present invention may prevent at least one symptom in the subject including, e.g., pain, edema and stiffness in one or more joints, MAC deposition and tissue damage, and inflammation (e.g., chronic inflammation); in a subject having IgA nephropathy, the methods of the present invention may prevent at least one symptom in the subject including, e.g., hematuria, proteinuria, hypertension, inflammation (e.g., chronic inflammation), pain, high blood pressure, and edema in hands and/or feet; in a subject having thrombotic microangiopathy, the methods of the present invention may prevent at least one symptom in the subject including, e.g., hemolysis, thrombocytopenia, inflammation (e.g., chronic inflammation), renal failure, hypertension, fever, fatigue, and seizures; in a subject having diabetic nephropathy, the methods of the present invention may prevent at least one symptom in the subject including, e.g., inflammation (e.g., chronic inflammation), proteinuria, edema, hypertension, fatigue, itching, nausea or vomiting, and renal failure; and in a subject having membranous nephropathy, the methods of the present invention may prevent at least one symptom in the subject including, e.g., proteinuria, renal failure, edema, fatigue, hematuria, hypertension, and inflammation (e.g., chronic inflammation).

[0067] The following detailed description discloses how to make and use compositions containing iRNAs to inhibit the expression of a MASP2 gene as well as compositions, uses, and methods for treating subjects that would benefit from inhibition and/or reduction of the expression of a MASP2 gene, e.g., subjects susceptible to or diagnosed with a MASP2-associated disorder.

[0068] In order that the present invention may be more readily understood, certain terms are first defined. In addition, it should be noted that whenever a value or range of values of a parameter are recited, it is intended that values and ranges intermediate to the recited values are also intended to be part of this invention.

[0069] The articles “a” and “an” are used herein to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article. By way of example, “an element” means one element or more than one element, e.g., a plurality of elements.

[0070] The term “including” is used herein to mean, and is used interchangeably with, the phrase “including but not limited to”.

[0071] The term “or” is used herein to mean, and is used interchangeably with, the term “and/or,” unless context clearly indicates otherwise. For example, “sense strand or antisense strand” is understood as “sense strand or antisense strand or sense strand and antisense strand.”

[0072] The term “about” is used herein to mean within the typical ranges of tolerances in the art. For example, “about” can be understood as about 2 standard deviations from the mean. In certain embodiments, about means ±10%. In certain embodiments, about means ±5%. When about is present before a series of numbers or a range, it is understood that “about” can modify each of the numbers in the series or range.

[0073] The term “at least” prior to a number or series of numbers is understood to include the number adjacent to the term “at least”, and all subsequent numbers or integers that could logically be included, as clear from context. For example, the number of nucleotides in a nucleic acid molecule must be an integer. For example, “at least 19 nucleotides of a 21 nucleotide nucleic acid molecule” means that 19, 20, or 21 nucleotides have the indicated property. When at least is present before a series of numbers or a range, it is understood that “at least” can modify each of the numbers in the series or range.

[0074] As used herein, “no more than” or “or less” is understood as the value adjacent to the phrase and logical lower values or integers, as logical from context, to zero. For example, a duplex with an overhang of “no more than 2 nucleotides” has a 2, 1, or 0 nucleotide overhang. When “no more than” is present before a series of numbers or a range, it is understood that “no more than” can modify each of the numbers in the series or range. As used herein, ranges include both the upper and lower limit.

[0075] In the event of a conflict between a sequence and its indicated site on a transcript or other sequence, the nucleotide sequence recited in the specification takes precedence.

[0076] As used herein, the term “mannan binding lectin serine peptidase 2,” used interchangeably with the term “MASP2,” refers to the well-known gene and polypeptide, also known in the art as mannan binding lectin serine protease 2, MBL-associated serine protease 2, mannose-binding protein-associated serine protease 2, MBL-associated plasma protein of 19 KDa (Map19) and MASP1P1.

[0077] Exemplary nucleotide and amino acid sequences of MASP2 can be found, for example, at GenBank Accession No. NM_006610.4 (SEQ ID NO: 1; reverse complement SEQ ID NO: 2) and NM-006610.3 (SEQ ID NO: 3; reverse complement SEQ ID NO: 4) for Homo sapiens MASP2 long isoform; GenBank Accession No. NM_139208.2 (SEQ ID NO: 5; reverse complement SEQ ID NO: 6) for Homo sapiens MASP2 short isoform; GenBank Accession No. NM_001003893.2 (SEQ ID NO: 7; reverse complement SEQ ID NO: 8) for Mus musculus MASP2 long isoform; GenBank Accession No. NM_010767.3 (SEQ ID NO: 9; reverse complement SEQ ID NO: 10) for Mus musculus MASP2 short isoform; GenBank Accession No. XM_005544812.2 (SEQ ID NO: 11; reverse complement SEQ ID NO: 12) for Macaca fascicularis MASP2 long isoform; GenBank Accession No. XR_001487411.1 (SEQ ID NO: 13; reverse complement SEQ ID NO: 14) for Macaca fascicularis MASP2 short isoform; GenBank Accession No. NM_172043.1 (SEQ ID NO: 15; reverse complement SEQ ID NO: 16) for Rattus norvegicus MASP2 long isoform; and GenBank Accession No. AJ542538.1 (SEQ ID NO: 17; reverse complement SEQ ID NO: 18) for Rattus norvegicus MASP2 short isoform.

[0078] Additional examples of MASP2 mRNA sequences are readily available using, e.g., GenBank, UniProt, OMIM, and the Macaca genome project web site.

[0079] Further information on MASP2 is provided, for example in the NCBI Gene database at http://www.ncbi.nlm.nih.gov/gene/10747.

[0080] The entire contents of each of the foregoing GenBank Accession numbers and the Gene database numbers are incorporated herein by reference as of the date of filing this application.

[0081] The terms “mannan binding lectin serine peptidase 2” and “MASP2,” as used herein, also refers to naturally occurring DNA sequence variations of the MASP2 gene. Numerous sequence variations within the MASP2 gene have been identified and may be found at, for example, NCBI dbSNP and UniProt (see, e.g., http://www.ncbi.nlm.nih.gov/snp?LinkName=gene_snp&from_uid=10747, the entire contents of which is incorporated herein by reference as of the date of filing this application.

[0082] As used herein, “target sequence” refers to a contiguous portion of the nucleotide sequence of an mRNA molecule formed during the transcription of a MASP2 gene, including mRNA that is a product of RNA processing of a primary transcription product. The target portion of the sequence will be at least long enough to serve as a substrate for iRNA-directed cleavage at or near that portion of the nucleotide sequence of an mRNA molecule formed during the transcription of a MASP2 gene. In one embodiment, the target sequence is within the protein coding region of MASP2.

[0083] The target sequence may be from about 19-36 nucleotides in length, e.g., about 19-30 nucleotides in length. For example, the target sequence can be about 19-30 nucleotides, 19-30, 19-29, 19-28, 19-27, 19-26, 19-25, 19-24, 19-23, 19-22, 19-21, 19-20, 20-30, 20-29, 20-28, 20-27, 20-26, 20-25, 20-24, 20-23, 20-22, 20-21, 21-30, 21-29, 21-28, 21-27, 21-26, 21-25, 21-24, 21-23, or 21-22 nucleotides in length. Ranges and lengths intermediate to the above recited ranges and lengths are also contemplated to be part of the invention.

[0084] As used herein, the term “strand comprising a sequence” refers to an oligonucleotide comprising a chain of nucleotides that is described by the sequence referred to using the standard nucleotide nomenclature.

[0085] “G,” “C,” “A,” “T,” and “U” each generally stand for a nucleotide that contains guanine, cytosine, adenine, thymidine, and uracil as a base, respectively. However, it will be understood that the term “ribonucleotide” or “nucleotide” can also refer to a modified nucleotide, as further detailed below, or a surrogate replacement moiety (see, e.g., Table 1). The skilled person is well aware that guanine, cytosine, adenine, and uracil can be replaced by other moieties without substantially altering the base pairing properties of an oligonucleotide comprising a nucleotide bearing such replacement moiety. For example, without limitation, a nucleotide comprising inosine as its base can base pair with nucleotides containing adenine, cytosine, or uracil. Hence, nucleotides containing uracil, guanine, or adenine can be replaced in the nucleotide sequences of dsRNA featured in the invention by a nucleotide containing, for example, inosine. In another example, adenine and cytosine anywhere in the oligonucleotide can be replaced with guanine and uracil, respectively to form G-U Wobble base pairing with the target mRNA. Sequences containing such replacement moieties are suitable for the compositions and methods featured in the invention.

[0086] The terms “iRNA”, “RNAi agent,” “iRNA agent,”, “RNA interference agent” as used interchangeably herein, refer to an agent that contains RNA as that term is defined herein, and which mediates the targeted cleavage of an RNA transcript via an RNA-induced silencing complex (RISC) pathway. iRNA directs the sequence-specific degradation of mRNA through a process known as RNA interference (RNAi). The iRNA modulates, e.g., inhibits, the expression of a MASP2 gene in a cell, e.g., a cell within a subject, such as a mammalian subject.

[0087] In one embodiment, an RNAi agent of the invention includes a single stranded RNA that interacts with a target RNA sequence, e.g., a MASP2 target mRNA sequence, to direct the cleavage of the target RNA. Without wishing to be bound by theory it is believed that long double stranded RNA introduced into cells is broken down into siRNA by a Type III endonuclease known as Dicer (Sharp et al. (2001) Genes Dev. 15:485). Dicer, a ribonuclease-III-like enzyme, processes the dsRNA into 19-23 base pair short interfering RNAs with characteristic two base 3′ overhangs (Bernstein, et al., (2001) Nature 409:363). The siRNAs are then incorporated into an RNA-induced silencing complex (RISC) where one or more helicases unwind the siRNA duplex, enabling the complementary antisense strand to guide target recognition (Nykanen, et al., (2001) Cell 107:309). Upon binding to the appropriate target mRNA, one or more endonucleases within the RISC cleave the target to induce silencing (Elbashir, et al., (2001) Genes Dev. 15:188). Thus, in one aspect the invention relates to a single stranded RNA (siRNA) generated within a cell and which promotes the formation of a RISC complex to effect silencing of the target gene, i.e., a MASP2 gene. Accordingly, the term “siRNA” is also used herein to refer to an iRNA as described above.

[0088] In certain embodiments, the RNAi agent may be a single-stranded siRNA (ssRNAi) that is introduced into a cell or organism to inhibit a target mRNA. Single-stranded RNAi agents bind to the RISC endonuclease, Argonaute 2, which then cleaves the target mRNA. The single-stranded siRNAs are generally 15-30 nucleotides and are chemically modified. The design and testing of single-stranded siRNAs are described in U.S. Pat. No. 8,101,348 and in Lima et al., (2012) Cell 150:883-894, the entire contents of each of which are hereby incorporated herein by reference. Any of the antisense nucleotide sequences described herein may be used as a single-stranded siRNA as described herein or as chemically modified by the methods described in Lima et al., (2012) Cell 150:883-894.

[0089] In certain embodiments, an “iRNA” for use in the compositions, uses, and methods of the invention is a double stranded RNA and is referred to herein as a “double stranded RNA agent,” “double stranded RNA (dsRNA) molecule,” “dsRNA agent,” or “dsRNA”. The term “dsRNA”, refers to a complex of ribonucleic acid molecules, having a duplex structure comprising two anti-parallel and substantially complementary nucleic acid strands, referred to as having “sense” and “antisense” orientations with respect to a target RNA, i.e., a MASP2 gene. In some embodiments of the invention, a double stranded RNA (dsRNA) triggers the degradation of a target RNA, e.g., an mRNA, through a post-transcriptional gene-silencing mechanism referred to herein as RNA interference or RNAi.

[0090] In general, the majority of nucleotides of each strand of a dsRNA molecule are ribonucleotides, but as described in detail herein, each or both strands can also include one or more non-ribonucleotides, e.g., a deoxyribonucleotide or a modified nucleotide. In addition, as used in this specification, an “iRNA” may include ribonucleotides with chemical modifications; an iRNA may include substantial modifications at multiple nucleotides. As used herein, the term “modified nucleotide” refers to a nucleotide having, independently, a modified sugar moiety, a modified internucleotide linkage, or modified nucleobase, or any combination thereof. Thus, the term modified nucleotide encompasses substitutions, additions or removal of, e.g., a functional group or atom, to internucleoside linkages, sugar moieties, or nucleobases. The modifications suitable for use in the agents of the invention include all types of modifications disclosed herein or known in the art. Any such modifications, as used in a siRNA type molecule, are encompassed by “iRNA” or “RNAi agent” for the purposes of this specification and claims.

[0091] The duplex region may be of any length that permits specific degradation of a desired target RNA through a RISC pathway, and may range from about 19 to 36 base pairs in length, e.g., about 19-30 base pairs in length, for example, about 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, or 36 base pairs in length, such as about 19-30, 19-29, 19-28, 19-27, 19-26, 19-25, 19-24, 19-23, 19-22, 19-21, 19-20, 20-30, 20-29, 20-28, 20-27, 20-26, 20-25, 20-24, 20-23, 20-22, 20-21, 21-30, 21-29, 21-28, 21-27, 21-26, 21-25, 21-24, 21-23, or 21-22 base pairs in length. Ranges and lengths intermediate to the above recited ranges and lengths are also contemplated to be part of the invention.

[0092] The two strands forming the duplex structure may be different portions of one larger RNA molecule, or they may be separate RNA molecules. Where the two strands are part of one larger molecule, and they may be connected by an uninterrupted chain of nucleotides between the 3′-end of one strand and the 5′-end of the respective other strand forming the duplex structure, the connecting RNA chain is referred to as a “hairpin loop.” A hairpin loop can comprise at least one unpaired nucleotide. In some embodiments, the hairpin loop can comprise at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 23 or more unpaired nucleotides. In some embodiments, the hairpin loop can be 10 or fewer nucleotides. In some embodiments, the hairpin loop can be 8 or fewer unpaired nucleotides. In some embodiments, the hairpin loop can be 4-10 unpaired nucleotides. In some embodiments, the hairpin loop can be 4-8 nucleotides.

[0093] Where the two substantially complementary strands of a dsRNA are comprised by separate RNA molecules, those molecules need not be, but can be covalently connected. Where the two strands are connected covalently by means other than an uninterrupted chain of nucleotides between the 3′-end of one strand and the 5′-end of the respective other strand forming the duplex structure, the connecting structure is referred to as a “linker.” The RNA strands may have the same or a different number of nucleotides. The maximum number of base pairs is the number of nucleotides in the shortest strand of the dsRNA minus any overhangs that are present in the duplex. In addition to the duplex structure, an RNAi may comprise one or more nucleotide overhangs.

[0094] In certain embodiments, an iRNA agent of the invention is a dsRNA, each strand of which comprises 19-23 nucleotides, that interacts with a target RNA sequence, e.g., a MASP2 gene, to direct cleavage of the target RNA.

[0095] In some embodiments, an iRNA of the invention is a dsRNA of 24-30 nucleotides that interacts with a target RNA sequence, e.g., a MASP2 target mRNA sequence, to direct the cleavage of the target RNA.

[0096] As used herein, the term “nucleotide overhang” refers to at least one unpaired nucleotide that protrudes from the duplex structure of a double stranded iRNA. For example, when a 3′-end of one strand of a dsRNA extends beyond the 5′-end of the other strand, or vice versa, there is a nucleotide overhang. A dsRNA can comprise an overhang of at least one nucleotide; alternatively, the overhang can comprise at least two nucleotides, at least three nucleotides, at least four nucleotides, at least five nucleotides or more. A nucleotide overhang can comprise or consist of a nucleotide/nucleoside analog, including a deoxynucleotide/nucleoside. The overhang(s) can be on the sense strand, the antisense strand, or any combination thereof. Furthermore, the nucleotide(s) of an overhang can be present on the 5′-end, 3′-end, or both ends of either an antisense or sense strand of a dsRNA.

[0097] In certain embodiments, the antisense strand of a dsRNA has a 1-10 nucleotides, e.g., a 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 nucleotide, overhang at the 3′-end or the 5′-end. In certain embodiments, the overhang on the sense strand or the antisense strand, or both, can include extended lengths longer than 10 nucleotides, e.g., 1-30 nucleotides, 2-30 nucleotides, 10-30 nucleotides, 10-25 nucleotides, 10-20 nucleotides, or 10-15 nucleotides in length. In certain embodiments, an extended overhang is on the sense strand of the duplex. In certain embodiments, an extended overhang is present on the 3′ end of the sense strand of the duplex. In certain embodiments, an extended overhang is present on the 5′ end of the sense strand of the duplex. In certain embodiments, an extended overhang is on the antisense strand of the duplex. In certain embodiments, an extended overhang is present on the 3′end of the antisense strand of the duplex. In certain embodiments, an extended overhang is present on the 5′end of the antisense strand of the duplex. In certain embodiments, one or more of the nucleotides in the extended overhang is replaced with a nucleoside thiophosphate. In certain embodiments, the overhang includes a self-complementary portion such that the overhang is capable of forming a hairpin structure that is stable under physiological conditions.

[0098] “Blunt” or “blunt end” means that there are no unpaired nucleotides at that end of the double stranded RNA agent, i.e., no nucleotide overhang. A “blunt ended” double stranded RNA agent is double stranded over its entire length, i.e., no nucleotide overhang at either end of the molecule. The RNAi agents of the invention include RNAi agents with no nucleotide overhang at one end (i.e., agents with one overhang and one blunt end) or with no nucleotide overhangs at either end. Most often such a molecule will be double-stranded over its entire length.

[0099] The term “antisense strand” or “guide strand” refers to the strand of an iRNA, e.g., a dsRNA, which includes a region that is substantially complementary to a target sequence, e.g., a MASP2 mRNA.

[0100] As used herein, the term “region of complementarity” refers to the region on the antisense strand that is substantially complementary to a sequence, for example a target sequence, e.g., a MASP2 nucleotide sequence, as defined herein. Where the region of complementarity is not fully complementary to the target sequence, the mismatches can be in the internal or terminal regions of the molecule. Generally, the most tolerated mismatches are in the terminal regions, e.g., within 5, 4, or 3 nucleotides of the 5′- or 3′-end of the iRNA. In some embodiments, a double stranded RNA agent of the invention includes a nucleotide mismatch in the antisense strand. In some embodiments, the antisense strand of the double stranded RNA agent of the invention includes no more than 4 mismatches with the target mRNA, e.g., the antisense strand includes 4, 3, 2, 1, or 0 mismatches with the target mRNA. In some embodiments, the antisense strand double stranded RNA agent of the invention includes no more than 4 mismatches with the sense strand, e.g., the antisense strand includes 4, 3, 2, 1, or 0 mismatches with the sense strand. In some embodiments, a double stranded RNA agent of the invention includes a nucleotide mismatch in the sense strand. In some embodiments, the sense strand of the double stranded RNA agent of the invention includes no more than 4 mismatches with the antisense strand, e.g., the sense strand includes 4, 3, 2, 1, or 0 mismatches with the antisense strand. In some embodiments, the nucleotide mismatch is, for example, within 5, 4, 3 nucleotides from the 3′-end of the iRNA. In another embodiment, the nucleotide mismatch is, for example, in the 3′-terminal nucleotide of the iRNA agent. In some embodiments, the mismatch(s) is not in the seed region.

[0101] Thus, an RNAi agent as described herein can contain one or more mismatches to the target sequence. In one embodiment, a RNAi agent as described herein contains no more than 3 mismatches (i.e., 3, 2, 1, or 0 mismatches). In one embodiment, an RNAi agent as described herein contains no more than 2 mismatches. In one embodiment, an RNAi agent as described herein contains no more than 1 mismatch. In one embodiment, an RNAi agent as described herein contains 0 mismatches. In certain embodiments, when the antisense strand of the RNAi agent contains mismatches to the target sequence, then the mismatch can optionally be restricted to be within the last 5 nucleotides from either the 5′- or 3′-end of the region of complementarity. For example, in such embodiments, for a 23 nucleotide RNAi agent, the strand which is complementary to a region of a MASP2 gene, generally does not contain any mismatch within the central 13 nucleotides. The methods described herein or methods known in the art can be used to determine whether an RNAi agent containing a mismatch to a target sequence is effective in inhibiting the expression of a MASP2 gene. For example, Jackson et al. (Nat. Biotechnol. 2003; 21: 635-637) described an expression profile study where the expression of a small set of genes with sequence identity to the MAPK14 siRNA only at 12-18 nt of the sense strand, was down-regulated with similar kinetics to MAPK14. Similarly, Lin et al., (Nucleic Acids Res. 2005; 33(14): 4527-4535) using qPCR and reporter assays, showed that a 7 nt complementation between a siRNA and a target is sufficient to cause mRNA degradation of the target. Consideration of the efficacy of RNAi agents with mismatches in inhibiting expression of a MASP2 gene is important, especially if the particular region of complementarity in a MASP2 gene is known to have polymorphic sequence variation within the population.

[0102] The term “sense strand” or “passenger strand” as used herein, refers to the strand of an iRNA that includes a region that is substantially complementary to a region of the antisense strand as that term is defined herein.

[0103] As used herein, “substantially all of the nucleotides are modified” are largely but not wholly modified and can include not more than 5, 4, 3, 2, or 1 unmodified nucleotides.

[0104] As used herein, the term “cleavage region” refers to a region that is located immediately adjacent to the cleavage site. The cleavage site is the site on the target at which cleavage occurs. In some embodiments, the cleavage region comprises three bases on either end of, and immediately adjacent to, the cleavage site. In some embodiments, the cleavage region comprises two bases on either end of, and immediately adjacent to, the cleavage site. In some embodiments, the cleavage site specifically occurs at the site bound by nucleotides 10 and 11 of the antisense strand, and the cleavage region comprises nucleotides 11, 12 and 13.

[0105] As used herein, and unless otherwise indicated, the term “complementary,” when used to describe a first nucleotide sequence in relation to a second nucleotide sequence, refers to the ability of an oligonucleotide or polynucleotide comprising the first nucleotide sequence to hybridize and form a duplex structure under certain conditions with an oligonucleotide or polynucleotide comprising the second nucleotide sequence, as will be understood by the skilled person. Such conditions can be, for example, “stringent conditions”, including but not limited to, 400 mM NaCl, 40 mM PIPES pH 6.4, 1 mM EDTA, 50° C. or 70° C. for 12-16 hours followed by washing (see, e.g., “Molecular Cloning: A Laboratory Manual, Sambrook, et al. (1989) Cold Spring Harbor Laboratory Press). As used herein, “stringent conditions” or “stringent hybridization conditions” refers to conditions under which an antisense compound will hybridize to its target sequence, but to a minimal number of other sequences. Stringent conditions are sequence-dependent and will be different in different circumstances, and “stringent conditions” under which antisense compounds hybridize to a target sequence are determined by the nature and composition of the antisense compounds and the assays in which they are being investigated. Other conditions, such as physiologically relevant conditions as can be encountered inside an organism, can apply. The skilled person will be able to determine the set of conditions most appropriate for a test of complementarity of two sequences in accordance with the ultimate application of the hybridized nucleotides.

[0106] Complementary sequences within an iRNA, e.g., within a dsRNA as described herein, include base-pairing of the oligonucleotide or polynucleotide comprising a first nucleotide sequence to an oligonucleotide or polynucleotide comprising a second nucleotide sequence over the entire length of one or both nucleotide sequences. Such sequences can be referred to as “fully complementary” with respect to each other herein. However, where a first sequence is referred to as “substantially complementary” with respect to a second sequence herein, the two sequences can be fully complementary, or they can form one or more, but generally not more than 5, 4, 3, or 2 mismatched base pairs upon hybridization for a duplex up to 30 base pairs. In some embodiments, the “substantially complementary” sequences disclosed herein comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the target MASP2 sequence, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary. However, where two oligonucleotides are designed to form, upon hybridization, one or more single stranded overhangs, such overhangs shall not be regarded as mismatches with regard to the determination of complementarity. For example, a dsRNA comprising one oligonucleotide 21 nucleotides in length and another oligonucleotide 23 nucleotides in length, wherein the longer oligonucleotide comprises a sequence of 21 nucleotides that is fully complementary to the shorter oligonucleotide, can yet be referred to as “fully complementary” for the purposes described herein.

[0107] “Complementary” sequences, as used herein, can also include, or be formed entirely from, non-Watson-Crick base pairs or base pairs formed from non-natural and modified nucleotides, in so far as the above requirements with respect to their ability to hybridize are fulfilled. Such non-Watson-Crick base pairs include, but are not limited to, G:U Wobble or Hoogsteen base pairing.

[0108] The terms “complementary,” “fully complementary” and “substantially complementary” herein can be used with respect to the base matching between two oligonucleotides or polynucleotides, such as the sense strand and the antisense strand of a dsRNA, or between the antisense strand of a double stranded RNA agent and a target sequence, as will be understood from the context of their use.

[0109] As used herein, a polynucleotide that is “substantially complementary to at least part of” a messenger RNA (mRNA) refers to a polynucleotide that is substantially complementary to a contiguous portion of the mRNA of interest (e.g., an mRNA encoding a MASP2 gene). For example, a polynucleotide is complementary to at least a part of a MASP2 mRNA if the sequence is substantially complementary to a non-interrupted portion of an mRNA encoding a MASP2 gene.

[0110] Accordingly, in some embodiments, the antisense polynucleotides disclosed herein are fully complementary to the target MASP2 sequence. In other embodiments, the antisense polynucleotides disclosed herein are substantially complementary to the target MASP2 sequence and comprise a contiguous nucleotide sequence which is at least 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of SEQ ID NOs:1, 3, 5, 7, 9, 11, 13, 15 or 17, or a fragment of any one of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, 15 or 17, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.

[0111] In some embodiments, the antisense polynucleotides disclosed herein are substantially complementary to a fragment of a target MASP2 sequence and comprise a contiguous nucleotide sequence which is at least 80% complementary over its entire length to a fragment of SEQ ID NO: 1 selected from the group of nucleotides 3-23, 21-41, 39-59, 57-77, 76-96, 94-114, 112-132, 130-150, 148-168, 166-186, 184-204, 203-223, 221-241, 239-259, 257-277, 275-295, 293-313, 312-332, 330-350, 348-368, 366-386, 384-404, 402-422, 420-440, 439-459, 457-477, 475-495, 493-513, 511-531, 529-549, 547-567, 566-586, 584-604, 602-622, 620-640, 638-658, 656-676, 675-695, 693-713, 711-731, 729-749, 747-767, 765-785, 783-803, 802-822, 820-840, 838-858, 856-876, 874-894, 892-912, 910-930, 929-949, 947-967, 965-985, 983-1003, 1001-1021, 1019-1039, 1038-1058, 1056-1076, 1074-1094, 1092-1112, 1110-1130, 1128-1148, 1146-1166, 1165-1185, 1183-1203, 1201-1221, 1219-1239, 1237-1257, 1255-1275, 1273-1293, 1292-1312, 1310-1330, 1328-1348, 1346-1366, 1364-1384, 1382-1402, 1400-1420, 1419-1439, 1437-1457, 1455-1475, 1473-1493, 1491-1511, 1509-1529, 1528-1548, 1546-1566, 1564-1584, 1582-1602, 1600-1620, 1618-1638, 1636-1656, 1655-1675, 1673-1693, 1691-1711, 1709-1729, 1727-1747, 1745-1765, 1763-1783, 1782-1802, 1800-1820, 1818-1838, 1836-1856, 1854-1874, 1872-1892, 1891-1911, 1909-1929, 1927-1947, 1945-1965, 1963-1983, 1981-2001, 1999-2019, 2018-2038, 2036-2056, 2054-2074, 2072-2092, 2090-2110, 2108-2128, 2126-2146, 2145-2165, 2163-2183, 2181-2201, 2199-2219, 2217-2237, 2235-2255, 2254-2274, 2272-2292, 2290-2310, 2308-2328, 2326-2346, 2344-2364, 2362-2382, 2381-2401, 2399-2419, 2417-2437 or 2435-2455 of SEQ ID NO: 1, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.

[0112] In some embodiments, the antisense polynucleotides disclosed herein are substantially complementary to a fragment of a target MASP2 sequence and comprise a contiguous nucleotide sequence which is at least 80% complementary over its entire length to a fragment of SEQ ID NO: 3 selected from the group of nucleotides 1263-1283, 1190-1210, 1191-1211, 1078-1098, 1270-1290, 885-905, 761-781, 1255-1275, 1279-1299, 1197-1217, 1021-1041, 704-724, 1968-1988, 1277-1297, 1204-1224, 1193-1213, 1201-1221, 1390-1410, 1272-1292, 1282-1302, 959-979, 1199-1219, 1620-1640, 1806-1826, 1783-1803, 1623-1643, 1397-1417, 1782-1802, 1777-1797, 1490-1510, 1712-1732, 1676-1696, 1353-1373, 2189-2209, 1438-1458, 1820-1840, 1664-1684, 1386-1406, 1665-1685, 1282-1302, 1864-1884, 1785-1805, 2333-2353, 1779-1799, 1351-1371, 1350-1370, 1031-1051, 2046-2066, 1616-1636, 2372-2392, 1667-1687, 1675-1695, 1780-1800, 1541-1561, 1551-1571, 1399-1419, 1701-1721, 1715-1735, 1700-1720, 1668-1688, 1366-1386, 2191-2211, 2374-2394, 1400-1420, 1314-1334, 1821-1841, 1807-1827, 1652-1672, 2129-2149, 1778-1798, 1702-1722, 1404-1424, 1593-1613, 1773-1793, 2373-2393, 1545-1565, 1812-1832, 1677-1697, 1359-1379, 1663-1683, 1365-1385, 2194-2214, 1393-1413, 1621-1641, 1673-1693, 1594-1614, 1387-1407, 1542-1562, 1972-1992, 1550-1570, 1323-1343, 1357-1377, 1360-1380, 1711-1731, 1830-1850, 1781-1801, 1405-1425, 2122-2142, 1437-1457, 1973-1993, 2379-2399, 1398-1418, 1669-1689, 1355-1375, 2196-2216, 1320-1340, 1407-1427, 1862-1882, 1666-1686, 1354-1374, 1974-1994, 1662-1682 or 1653-16 of SEQ ID NO: 3, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.

[0113] In some embodiments, the antisense polynucleotides disclosed herein are substantially complementary to a fragment of a target MASP2 sequence and comprise a contiguous nucleotide sequence which is at least 80% complementary over its entire length to a fragment of SEQ ID NO: 5 selected from the group of nucleotides 363-383, 543-563, 437-457, 93-113, 243-263, 144-164, 85-105, 257-277, 435-455, 358-378, 26-46 or 344-364 of SEQ ID NO: 5, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.

[0114] In other embodiments, the antisense polynucleotides disclosed herein are substantially complementary to the target MASP2 sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to any one of the sense strand nucleotide sequences in any one of any one of Tables 2-7, or a fragment of any one of the sense strand nucleotide sequences in any one of Tables 2-7, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99%, or 100% complementary.

[0115] In one embodiment, an RNAi agent of the disclosure includes a sense strand that is substantially complementary to an antisense polynucleotide which, in turn, is the same as a target MASP2 sequence, and wherein the sense strand polynucleotide comprises a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, 16 or 18, or a fragment of any one of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, 16 or 18, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99%, or 100% complementary.

[0116] In some embodiments, an iRNA of the invention includes a sense strand that is substantially complementary to an antisense polynucleotide which, in turn, is complementary to a target MASP2 sequence, and wherein the sense strand polynucleotide comprises a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to any one of the antisense strand nucleotide sequences in any one of any one of Tables 2-7, or a fragment of any one of the antisense strand nucleotide sequences in any one of Tables 2-7, such as about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99%, or 100% complementary.

[0117] In certain embodiments, the sense and antisense strands are selected from any one of duplexes AD-1143337, AD-1143348, AD-155520, AD-1143374, AD-1144836, AD-1143386, AD-1144837, AD-1144838, AD-1143406, AD-1143416, AD-1144839, AD-155599, AD-1143442, AD-155635, AD-1143470, AD-1144840, AD-1143479, AD-1143498, AD-1144841, AD-1143511, AD-1143523, AD-1143538, AD-1144842, AD-1143554, AD-1143570, AD-1144843, AD-1144844, AD-1143594, AD-155809, AD-1143619, AD-1143635, AD-1143649, AD-1143662, AD-1144845, AD-1143677, AD-1143691, AD-155927, AD-1144846, AD-155946, AD-1143731, AD-1143748, AD-155999, AD-1143774, AD-1143789, AD-1143802, AD-1144847, AD-1143816, AD-1143828, AD-1143845, AD-1143860, AD-156136, AD-1143891, AD-1143904, AD-1143919, AD-156208, AD-1143945, AD-1143957, AD-1144848, AD-156260, AD-1143982, AD-1144849, AD-156308, AD-1144019, AD-1144035, AD-1144050, AD-1144065, AD-1144077, AD-1144092, AD-1144105, AD-1144117, AD-156460, AD-156477, AD-156495, AD-1144173, AD-156531, AD-1144205, AD-1144217, AD-156584, AD-1144246, AD-1144257, AD-156639, AD-1144284, AD-1144299, AD-1144313, AD-156712, AD-1144343, AD-156748, AD-1144365, AD-1144376, AD-1144391, AD-1144850, AD-156832, AD-1144424, AD-1144440, AD-1144453, AD-1144466, AD-1144851, AD-1144852, AD-1144481, AD-1144494, AD-156962, AD-1144522, AD-1144853, AD-1144534, AD-1144854, AD-1144548, AD-1144855, AD-1144565, AD-1144578, AD-1144856, AD-1144857, AD-1144591, AD-1144604, AD-1144614, AD-1144858, AD-1144631, AD-1144640, AD-1144654, AD-1144669, AD-1144682, AD-157219, AD-1144859, AD-1144708, AD-1144718, AD-157273, AD-1144860, AD-1144745, AD-1144758, AD-1144771, AD-1144781, AD-1144793, AD-1144803, AD-157398, AD-157416, AD-1144861, AD-156804.1, AD-156950.1, AD-156927.1, AD-156807.1, AD-156581.1, AD-156926.1, AD-156921.1, AD-156674.1, AD-156889.1, AD-156853.1, AD-156538.1, AD-157227.1, AD-156622.1, AD-156964.1, AD-156841.1, AD-156571.1, AD-156842.1, AD-68457.2, AD-156990.1, AD-156929.1, AD-157334.1, AD-156923.1, AD-156536.1, AD-156535.1, AD-156255.1, AD-157093.1, AD-156800.1, AD-157371.1, AD-156844.1, AD-156852.1, AD-156924.1, AD-156725.1, AD-156735.1, AD-156583.1, AD-156878.1, AD-156892.1, AD-156877.1, AD-156845.1, AD-156551.1, AD-157229.1, AD-157373.1, AD-156584.1, AD-156499.1, AD-156965.1, AD-156951.1, AD-156829.1, AD-157167.1, AD-156922.1, AD-156879.1, AD-156588.1, AD-156777.1, AD-156917.1, AD-157372.1, AD-156729.1, AD-156956.1, AD-156854.1, AD-156544.1, AD-156840.1, AD-156550.1, AD-157232.1, AD-156577.1, AD-156805.1, AD-156850.1, AD-156778.1, AD-156572.1, AD-156726.1, AD-157059.1, AD-156734.1, AD-156508.1, AD-156542.1, AD-156545.1, AD-156888.1, AD-156974.1, AD-156925.1, AD-156589.1, AD-157160.1, AD-156621.1, AD-157060.1, AD-157378.1, AD-156582.1, AD-156846.1, AD-156540.1, AD-157234.1, AD-156505.1, AD-156591.1, AD-156988.1, AD-156843.1, AD-156539.1, AD-157061.1, AD-156839.1, AD-156830.1, AD-68438.1, AD-68439.1, AD-68440.1, AD-68441.1, AD-68442.1, AD-68443.1, AD-68444.1, AD-68445.1, AD-68446.1, AD-68447.1, AD-68448.1, AD-68449.1, AD-68450.1, AD-68451.1, AD-68452.1, AD-68453.1, AD-68454.1, AD-68455.1, AD-68456.1, AD-68457.1, AD-68458.1, AD-68459.1, AD-68460.1, AD-68461.1, AD-68462.1, AD-68463.1, AD-68464.1, AD-68465.1, AD-68466.1, AD-68467.1, AD-68468.1, AD-68469.1, AD-68470.1 or AD-68471.1.

[0118] In general, an “iRNA” includes ribonucleotides with chemical modifications. Such modifications may include all types of modifications disclosed herein or known in the art. Any such modifications, as used in a dsRNA molecule, are encompassed by “iRNA” for the purposes of this specification and claims.

[0119] In an aspect of the invention, an agent for use in the methods and compositions of the invention is a single-stranded antisense oligonucleotide molecule that inhibits a target mRNA via an antisense inhibition mechanism. The single-stranded antisense oligonucleotide molecule is complementary to a sequence within the target mRNA. The single-stranded antisense oligonucleotides can inhibit translation in a stoichiometric manner by base pairing to the mRNA and physically obstructing the translation machinery, see Dias, N. et al., (2002) Mol Cancer Ther 1:347-355. The single-stranded antisense oligonucleotide molecule may be about 14 to about 30 nucleotides in length and have a sequence that is complementary to a target sequence. For example, the single-stranded antisense oligonucleotide molecule may comprise a sequence that is at least about 14, 15, 16, 17, 18, 19, 20, or more contiguous nucleotides from any one of the antisense sequences described herein.

[0120] The phrase “contacting a cell with an iRNA,” such as a dsRNA, as used herein, includes contacting a cell by any possible means. Contacting a cell with an iRNA includes contacting a cell in vitro with the iRNA or contacting a cell in vivo with the iRNA. The contacting may be done directly or indirectly. Thus, for example, the iRNA may be put into physical contact with the cell by the individual performing the method, or alternatively, the iRNA may be put into a situation that will permit or cause it to subsequently come into contact with the cell.

[0121] Contacting a cell in vitro may be done, for example, by incubating the cell with the iRNA. Contacting a cell in vivo may be done, for example, by injecting the iRNA into or near the tissue where the cell is located, or by injecting the iRNA into another area, e.g., the bloodstream (i.e., intravenous) or the subcutaneous space, such that the agent will subsequently reach the tissue where the cell to be contacted is located. For example, the iRNA may contain or be coupled to a ligand, e.g., GalNAc, that directs the iRNA to a site of interest, e.g., the liver. Combinations of in vitro and in vivo methods of contacting are also possible. For example, a cell may also be contacted in vitro with an iRNA and subsequently transplanted into a subject.

[0122] In certain embodiments, contacting a cell with an iRNA includes “introducing” or “delivering the iRNA into the cell” by facilitating or effecting uptake or absorption into the cell. Absorption or uptake of an iRNA can occur through unaided diffusion or active cellular processes, or by auxiliary agents or devices. Introducing an iRNA into a cell may be in vitro or in vivo. For example, for in vivo introduction, iRNA can be injected into a tissue site or administered systemically. In vitro introduction into a cell includes methods known in the art such as electroporation and lipofection. Further approaches are described herein below or are known in the art.

[0123] The term “lipid nanoparticle” or “LNP” is a vesicle comprising a lipid layer encapsulating a pharmaceutically active molecule, such as a nucleic acid molecule, e.g., an iRNA or a plasmid from which an iRNA is transcribed. LNPs are described in, for example, U.S. Pat. Nos. 6,858,225, 6,815,432, 8,158,601, and 8,058,069, the entire contents of which are hereby incorporated herein by reference.

[0124] As used herein, a “subject” is an animal, such as a mammal, including a primate (such as a human, a non-human primate, e.g., a monkey, and a chimpanzee), a non-primate (such as a cow, a pig, a horse, a goat, a rabbit, a sheep, a hamster, a guinea pig, a cat, a dog, a rat, or a mouse), or a bird that expresses the target gene, either endogenously or heterologously. In an embodiment, the subject is a human, such as a human being treated or assessed for a disease or disorder that would benefit from reduction in MASP2 expression; a human at risk for a disease or disorder that would benefit from reduction in MASP2 expression; a human having a disease or disorder that would benefit from reduction in MASP2 expression; or human being treated for a disease or disorder that would benefit from reduction in MASP2 expression as described herein. In some embodiments, the subject is a female human. In other embodiments, the subject is a male human. In one embodiment, the subject is an adult subject. In another embodiment, the subject is a pediatric subject.

[0125] As used herein, the terms “treating” or “treatment” refer to a beneficial or desired result, such as reducing at least one sign or symptom of a MASP2-associated disorder, e.g., inflammation in a subject. Treatment also includes a reduction of one or more sign or symptoms associated with unwanted MASP2 expression, e.g., inflammation; diminishing the extent of unwanted MASP2 activation or stabilization; amelioration or palliation of unwanted MASP2 activation or stabilization. “Treatment” can also mean prolonging survival as compared to expected survival in the absence of treatment.

[0126] The term “lower” in the context of the level of MASP2 gene expression or MASP2 protein production in a subject, or a disease marker or symptom refers to a statistically significant decrease in such level. The decrease can be, for example, at least 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, or below the level of detection for the detection method in a relevant cell or tissue, e.g., a liver cell, or other subject sample, e.g., blood or serum derived therefrom, urine.

[0127] As used herein, “prevention” or “preventing,” when used in reference to a disease or disorder, that would benefit from a reduction in expression of a MASP2 gene or production of MASP2 protein, e.g., in a subject susceptible to a MASP2-associated disorder due to, e.g., aging, genetic factors, hormone changes, diet, and a sedentary lifestyle. In certain embodiments, the disease or disorder is e.g., a symptom of unwanted MASP2 activation or stabilization, such as inflammation. The likelihood of developing, e.g., inflammation, is reduced, for example, when an individual having one or more risk factors for inflammation either fails to develop inflammation or develops inflammation with less severity relative to a population having the same risk factors and not receiving treatment as described herein. The failure to develop a MASP2-associated disorder, e.g., inflammation, or a delay in the time to develop inflammation by months or years is considered effective prevention. Prevention may require administration of more than one dose if the iRNA agent.

[0128] As used herein, the term “mannan binding lectin serine peptidase 2-associated disease” or “MASP2-associated disease,” is a disease or disorder that would benefit from reduction in MASP2 expression. Non-limiting examples of MASP2-associated diseases include, arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0129] A “therapeutically-effective amount” or “prophylactically effective amount” also includes an amount of an RNAi agent that produces some desired effect at a reasonable benefit/risk ratio applicable to any treatment. The iRNA employed in the methods of the present invention may be administered in a sufficient amount to produce a reasonable benefit/risk ratio applicable to such treatment.

[0130] The phrase “pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human subjects and animal subjects without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.

[0131] The phrase “pharmaceutically-acceptable carrier” as used herein means a pharmaceutically-acceptable material, composition, or vehicle, such as a liquid or solid filler, diluent, excipient, manufacturing aid (e.g., lubricant, talc magnesium, calcium or zinc stearate, or steric acid), or solvent encapsulating material, involved in carrying or transporting the subject compound from one organ, or portion of the body, to another organ, or portion of the body. Each carrier must be “acceptable” in the sense of being compatible with the other ingredients of the formulation and not injurious to the subject being treated. Such carriers are known in the art. Pharmaceutically acceptable carriers include carriers for administration by injection.

[0132] The term “sample,” as used herein, includes a collection of similar fluids, cells, or tissues isolated from a subject, as well as fluids, cells, or tissues present within a subject. Examples of biological fluids include blood, serum and serosal fluids, plasma, cerebrospinal fluid, ocular fluids, lymph, urine, saliva, and the like. Tissue samples may include samples from tissues, organs, or localized regions. For example, samples may be derived from particular organs, parts of organs, or fluids or cells within those organs. In certain embodiments, samples may be derived from the liver (e.g., whole liver or certain segments of liver or certain types of cells in the liver, such as, e.g., hepatocytes). In some embodiments, a “sample derived from a subject” refers to urine obtained from the subject. A “sample derived from a subject” can refer to blood or blood derived serum or plasma from the subject.

[0133] The term “substituted” refers to the replacement of one or more hydrogen radicals in a given structure with the radical of a specified substituent including, but not limited to: alkyl, alkenyl, alkynyl, aryl, heterocyclyl, halo, thiol, alkylthio, arylthio, alkylthioalkyl, arylthioalkyl, alkylsulfonyl, alkylsulfonylalkyl, arylsulfonylalkyl, alkoxy, aryloxy, aralkoxy, aminocarbonyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonyl, aryloxycarbonyl, haloalkyl, amino, trifluoromethyl, cyano, nitro, alkylamino, arylamino, alkylaminoalkyl, arylaminoalkyl, aminoalkylamino, hydroxy, alkoxyalkyl, carboxyalkyl, alkoxycarbonylalkyl, aminocarbonylalkyl, acyl, aralkoxycarbonyl, carboxylic acid, sulfonic acid, sulfonyl, phosphonic acid, aryl, heteroaryl, heterocyclic, and aliphatic. It is understood that the substituent can be further substituted.

[0134] The term “alkyl” refers to saturated and unsaturated non-aromatic hydrocarbon chains that may be a straight chain or branched chain, containing the indicated number of carbon atoms (these include without limitation propyl, allyl, or propargyl), which may be optionally inserted with N, O, or S. For example, “(C1-C6) alkyl” means a radical having from 1 6 carbon atoms in a linear or branched arrangement. “(C1-C6) alkyl” includes, for example, methyl, ethyl, propyl, iso-propyl, n-butyl, tert-butyl, pentyl and hexyl. In certain embodiments, a lipophilic moiety of the instant disclosure can include a C6-C18 alkyl hydrocarbon chain.

[0135] The term “alkylene” refers to an optionally substituted saturated aliphatic branched or straight chain divalent hydrocarbon radical having the specified number of carbon atoms. For example, “(C1-C6) alkylene” means a divalent saturated aliphatic radical having from 1-6 carbon atoms in a linear arrangement, e.g., [(CH₂)_n], where n is an integer from 1 to 6. “(C1-C6) alkylene” includes methylene, ethylene, propylene, butylene, pentylene and hexylene. Alternatively, “(C1-C6) alkylene” means a divalent saturated radical having from 1-6 carbon atoms in a branched arrangement, for example: [(CH₂CH₂CH₂CH₂CH(CH₃)], [(CH₂CH₂CH₂CH₂C(CH₃)₂], [(CH₂C(CH₃)₂CH(CH₃))], and the like. The term “alkylenedioxo” refers to a divalent species of the structure —O—R—O—, in which R represents an alkylene.

[0136] The term “mercapto” refers to an —SH radical. The term “thioalkoxy” refers to an —S-alkyl radical.

[0137] The term “halo” refers to any radical of fluorine, chlorine, bromine or iodine. “Halogen” and “halo” are used interchangeably herein.

[0138] As used herein, the term “cycloalkyl” means a saturated or unsaturated nonaromatic hydrocarbon ring group having from 3 to 14 carbon atoms, unless otherwise specified. For example, “(C3-C10) cycloalkyl” means a hydrocarbon radical of a (3-10)-membered saturated aliphatic cyclic hydrocarbon ring. Examples of cycloalkyl groups include, but are not limited to, cyclopropyl, methyl-cyclopropyl, 2,2-dimethyl-cyclobutyl, 2-ethyl-cyclopentyl, cyclohexyl, etc. Cycloalkyls may include multiple spiro- or fused rings. Cycloalkyl groups are optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency.

[0139] As used herein, the term “alkenyl” refers to a non-aromatic hydrocarbon radical, straight or branched, containing at least one carbon-carbon double bond, and having from 2 to 10 carbon atoms unless otherwise specified. Up to five carbon-carbon double bonds may be present in such groups. For example, “C2-C6” alkenyl is defined as an alkenyl radical having from 2 to 6 carbon atoms. Examples of alkenyl groups include, but are not limited to, ethenyl, propenyl, butenyl, and cyclohexenyl. The straight, branched, or cyclic portion of the alkenyl group may contain double bonds and is optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency. The term “cycloalkenyl” means a monocyclic hydrocarbon group having the specified number of carbon atoms and at least one carbon-carbon double bond.

[0140] As used herein, the term “alkynyl” refers to a hydrocarbon radical, straight or branched, containing from 2 to 10 carbon atoms, unless otherwise specified, and containing at least one carbon-carbon triple bond. Up to 5 carbon-carbon triple bonds may be present. Thus, “C2-C6 alkynyl” means an alkynyl radical having from 2 to 6 carbon atoms. Examples of alkynyl groups include, but are not limited to, ethynyl, 2-propynyl, and 2-butynyl. The straight or branched portion of the alkynyl group may contain triple bonds as permitted by normal valency, and may be optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency.

[0141] As used herein, “alkoxyl” or “alkoxy” refers to an alkyl group as defined above with the indicated number of carbon atoms attached through an oxygen bridge. For example, “(C1-C3)alkoxy” includes methoxy, ethoxy and propoxy. For example, “(C1-C6)alkoxy”, is intended to include C1, C2, C3, C4, C5, and C6 alkoxy groups. For example, “(C1-C8)alkoxy”, is intended to include C1, C2, C3, C4, C5, C6, C7, and C8 alkoxy groups. Examples of alkoxy include, but are not limited to, methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, s-butoxy, t-butoxy, n-pentoxy, s-pentoxy, n-heptoxy, and n-octoxy. “Alkylthio” means an alkyl radical attached through a sulfur linking atom. The terms “alkylamino” or “aminoalkyl”, means an alkyl radical attached through an NH linkage. “Dialkylamino” means two alkyl radical attached through a nitrogen linking atom. The amino groups may be unsubstituted, monosubstituted, or di-substituted. In some embodiments, the two alkyl radicals are the same (e.g., N,N-dimethylamino) In some embodiments, the two alkyl radicals are different (e.g., N-ethyl-N-methylamino).

[0142] As used herein, “aryl” or “aromatic” means any stable monocyclic or polycyclic carbon ring of up to 7 atoms in each ring, wherein at least one ring is aromatic. Examples of aryl groups include, but are not limited to, phenyl, naphthyl, anthracenyl, tetrahydronaphthyl, indanyl, and biphenyl. In cases where the aryl substituent is bicyclic and one ring is non-aromatic, it is understood that attachment is via the aromatic ring. Aryl groups are optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency. The term “arylalkyl” or the term “aralkyl” refers to alkyl substituted with an aryl. The term “arylalkoxy” refers to an alkoxy substituted with aryl.

[0143] “Hetero” refers to the replacement of at least one carbon atom in a ring system with at least one heteroatom selected from N, S and O. “Hetero” also refers to the replacement of at least one carbon atom in an acyclic system. A hetero ring system or a hetero acyclic system may have, for example, 1, 2 or 3 carbon atoms replaced by a heteroatom.

[0144] As used herein, the term “heteroaryl” represents a stable monocyclic or polycyclic ring of up to 7 atoms in each ring, wherein at least one ring is aromatic and contains from 1 to 4 heteroatoms selected from the group consisting of O, N and S. Examples of heteroaryl groups include, but are not limited to, acridinyl, carbazolyl, cinnolinyl, quinoxalinyl, pyrrazolyl, indolyl, benzotriazolyl, furanyl, thienyl, benzothienyl, benzofuranyl, benzimidazolonyl, benzoxazolonyl, quinolinyl, isoquinolinyl, dihydroisoindolonyl, imidazopyridinyl, isoindolonyl, indazolyl, oxazolyl, oxadiazolyl, isoxazolyl, indolyl, pyrazinyl, pyridazinyl, pyridinyl, pyrimidinyl, pyrrolyl, tetrahydroquinoline. “Heteroaryl” is also understood to include the N-oxide derivative of any nitrogen-containing heteroaryl. In cases where the heteroaryl substituent is bicyclic and one ring is non-aromatic or contains no heteroatoms, it is understood that attachment is via the aromatic ring or via the heteroatom containing ring. Heteroaryl groups are optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency.

[0145] As used herein, the term “heterocycle,” “heterocyclic,” or “heterocyclyl” means a 3- to 14-membered aromatic or nonaromatic heterocycle containing from 1 to 4 heteroatoms selected from the group consisting of O, N and S, including polycyclic groups. As used herein, the term “heterocyclic” is also considered to be synonymous with the terms “heterocycle” and “heterocyclyl” and is understood as also having the same definitions set forth herein. “Heterocyclyl” includes the above mentioned heteroaryls, as well as dihydro and tetrahydro analogs thereof. Examples of heterocyclyl groups include, but are not limited to, azetidinyl, benzoimidazolyl, benzofuranyl, benzofurazanyl, benzopyrazolyl, benzotriazolyl, benzothiophenyl, benzoxazolyl, carbazolyl, carbolinyl, cinnolinyl, furanyl, imidazolyl, indolinyl, indolyl, indolazinyl, indazolyl, isobenzofuranyl, isoindolyl, isoquinolyl, isothiazolyl, isoxazolyl, naphthpyridinyl, oxadiazolyl, oxooxazolidinyl, oxazolyl, oxazoline, oxopiperazinyl, oxopyrrolidinyl, oxomorpholinyl, isoxazoline, oxetanyl, pyranyl, pyrazinyl, pyrazolyl, pyridazinyl, pyridopyridinyl, pyridazinyl, pyridyl, pyridinonyl, pyrimidyl, pyrimidinonyl, pyrrolyl, quinazolinyl, quinolyl, quinoxalinyl, tetrahydropyranyl, tetrahydrofuranyl, tetrahydrothiopyranyl, tetrahydroisoquinolinyl, tetrazolyl, tetrazolopyridyl, thiadiazolyl, thiazolyl, thienyl, triazolyl, 1,4-dioxanyl, hexahydroazepinyl, piperazinyl, piperidinyl, pyridin-2-onyl, pyrrolidinyl, morpholinyl, thiomorpholinyl, dihydrobenzoimidazolyl, dihydrobenzofuranyl, dihydrobenzothiophenyl, dihydrobenzoxazolyl, dihydrofuranyl, dihydroimidazolyl, dihydroindolyl, dihydroisooxazolyl, dihydroisothiazolyl, dihydrooxadiazolyl, dihydrooxazolyl, dihydropyrazinyl, dihydropyrazolyl, dihydropyridinyl, dihydropyrimidinyl, dihydropyrrolyl, dihydroquinolinyl, dihydrotetrazolyl, dihydrothiadiazolyl, dihydrothiazolyl, dihydrothienyl, dihydrotriazolyl, dihydroazetidinyl, dioxidothiomorpholinyl, methylenedioxybenzoyl, tetrahydrofuranyl, and tetrahydrothienyl, and N-oxides thereof. Attachment of a heterocyclyl substituent can occur via a carbon atom or via a heteroatom. Heterocyclyl groups are optionally mono-, di-, tri-, tetra-, or penta-substituted on any position as permitted by normal valency.

[0146] “Heterocycloalkyl” refers to a cycloalkyl residue in which one to four of the carbons is replaced by a heteroatom such as oxygen, nitrogen or sulfur. Examples of heterocycles whose radicals are heterocyclyl groups include tetrahydropyran, morpholine, pyrrolidine, piperidine, thiazolidine, oxazole, oxazoline, isoxazole, dioxane, tetrahydrofuran and the like.

[0147] The term “heteroaryl” refers to an aromatic 5-8 membered monocyclic, 8-12 membered bicyclic, or 11-14 membered tricyclic ring system having 1-3 heteroatoms if monocyclic, 1-6 heteroatoms if bicyclic, or 1-9 heteroatoms if tricyclic, said heteroatoms selected from O, N, or S (e.g., carbon atoms and 1-3, 1-6, or 1-9 heteroatoms of N, O, or S if monocyclic, bicyclic, or tricyclic, respectively), wherein 0, 1, 2, 3, or 4 atoms of each ring may be substituted by a substituent. Examples of heteroaryl groups include pyridyl, furyl or furanyl, imidazolyl, benzimidazolyl, pyrimidinyl, thiophenyl or thienyl, quinolinyl, indolyl, thiazolyl, and the like. The term “heteroarylalkyl” or the term “heteroaralkyl” refers to an alkyl substituted with a heteroaryl. The term “heteroarylalkoxy” refers to an alkoxy substituted with heteroaryl.

[0148] The term “cycloalkyl” as employed herein includes saturated and partially unsaturated cyclic hydrocarbon groups having 3 to 12 carbons, for example, 3 to 8 carbons, and, for example, 3 to 6 carbons, wherein the cycloalkyl group additionally may be optionally substituted. Cycloalkyl groups include, without limitation, cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl, and cyclooctyl.

[0149] The term “acyl” refers to an alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heterocyclylcarbonyl, or heteroarylcarbonyl substituent, any of which may be further substituted by substituents.

[0150] As used herein, “keto” refers to any alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, or aryl group as defined herein attached through a carbonyl bridge.

[0151] Examples of keto groups include, but are not limited to, alkanoyl (e.g., acetyl, propionyl, butanoyl, pentanoyl, hexanoyl), alkenoyl (e.g., acryloyl) alkynoyl (e.g., ethynoyl, propynoyl, butynoyl, pentynoyl, hexynoyl), aryloyl (e.g., benzoyl), heteroaryloyl (e.g., pyrroloyl, imidazoloyl, quinolinoyl, pyridinoyl).

[0152] As used herein, “alkoxycarbonyl” refers to any alkoxy group as defined above attached through a carbonyl bridge (i.e., —C(O)O-alkyl). Examples of alkoxycarbonyl groups include, but are not limited to, methoxycarbonyl, ethoxycarbonyl, iso-propoxycarbonyl, n-propoxycarbonyl, t-butoxycarbonyl, benzyloxycarbonyl or n-pentoxycarbonyl.

[0153] As used herein, “aryloxycarbonyl” refers to any aryl group as defined herein attached through an oxycarbonyl bridge (i.e., —C(O)O-aryl). Examples of aryloxycarbonyl groups include, but are not limited to, phenoxycarbonyl and naphthyloxycarbonyl.

[0154] As used herein, “heteroaryloxycarbonyl” refers to any heteroaryl group as defined herein attached through an oxycarbonyl bridge (i.e., —C(O)O-heteroaryl). Examples of heteroaryloxycarbonyl groups include, but are not limited to, 2-pyridyloxycarbonyl, 2-oxazolyloxycarbonyl, 4-thiazolyloxycarbonyl, or pyrimidinyloxycarbonyl.

[0155] The term “oxo” refers to an oxygen atom, which forms a carbonyl when attached to carbon, an N-oxide when attached to nitrogen, and a sulfoxide or sulfone when attached to sulfur.

[0156] The person of ordinary skill in the art would readily understand and appreciate that the compounds and compositions disclosed herein may have certain atoms (e.g., N, O, or S atoms) in a protonated or deprotonated state, depending upon the environment in which the compound or composition is placed. Accordingly, as used herein, the structures disclosed herein envisage that certain functional groups, such as, for example, OH, SH, or NH, may be protonated or deprotonated. The disclosure herein is intended to cover the disclosed compounds and compositions regardless of their state of protonation based on the pH of the environment, as would be readily understood by the person of ordinary skill in the art.

[0157] The present invention provides iRNAs that inhibit the expression of a MASP2 gene. In certain embodiments, the iRNA includes double stranded ribonucleic acid (dsRNA) molecules for inhibiting the expression of a MASP2 gene in a cell, such as a cell within a subject, e.g., a mammal, such as a human susceptible to developing a MASP2-associated disorder, e.g., inflammation. The dsRNAi agent includes an antisense strand having a region of complementarity which is complementary to at least a part of an mRNA formed in the expression of a MASP2 gene. The region of complementarity is about 19-30 nucleotides in length (e.g., about 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, or 19 nucleotides in length). Upon contact with a cell expressing the MASP2 gene, the iRNA inhibits the expression of the MASP2 gene (e.g., a human, a primate, a non-primate, or a rat MASP2 gene) by at least about 50% as compared to a similar cell not contacted with the RNAi agent or an RNAi agent not complimentary to the MASP2 gene. Expression of the gene may be assayed by, for example, a PCR or branched DNA (bDNA)-based method, or by a protein-based method, such as by immunofluorescence analysis, using, for example, western blotting or flow cytometric techniques. In some embodiments, inhibition of expression is determined by the qPCR method provided in the examples, especially in Example 2 with the siRNA at a 10 nM concentration in an appropriate organism cell line provided therein. In some embodiments, inhibition of expression in vivo is determined by knockdown of the human gene in a rodent expressing the human gene, e.g., a mouse or an AAV-infected mouse expressing the human target gene, e.g., when administered as single dose, e.g., at 3 mg/kg at the nadir of RNA expression. RNA expression in liver is determined using the PCR methods provided in Example 2.

[0158] A dsRNA includes two RNA strands that are complementary and hybridize to form a duplex structure under conditions in which the dsRNA will be used. One strand of a dsRNA (the antisense strand) includes a region of complementarity that is substantially complementary, or fully complementary, to a target sequence. The target sequence can be derived from the sequence of an mRNA formed during the expression of a MASP2 gene. The other strand (the sense strand) includes a region that is complementary to the antisense strand, such that the two strands hybridize and form a duplex structure when combined under suitable conditions. As described elsewhere herein and as known in the art, the complementary sequences of a dsRNA can also be contained as self-complementary regions of a single nucleic acid molecule, as opposed to being on separate oligonucleotides.

[0159] Generally, the duplex structure is 19 to 30 base pairs in length. Similarly, the region of complementarity to the target sequence is 19 to 30 nucleotides in length.

[0160] In some embodiments, the dsRNA is about 19 to about 23 nucleotides in length, or about 25 to about 30 nucleotides in length. In general, the dsRNA is long enough to serve as a substrate for the Dicer enzyme. For example, it is well-known in the art that dsRNAs longer than about 21-23 nucleotides in length may serve as substrates for Dicer. As the ordinarily skilled person will also recognize, the region of an RNA targeted for cleavage will most often be part of a larger RNA molecule, often an mRNA molecule. Where relevant, a “part” of an mRNA target is a contiguous sequence of an mRNA target of sufficient length to allow it to be a substrate for RNAi-directed cleavage (i.e., cleavage through a RISC pathway).

[0161] One of skill in the art will also recognize that the duplex region is a primary functional portion of a dsRNA, e.g., a duplex region of about 19 to about 30 base pairs, e.g., about 19-30, 19-29, 19-28, 19-27, 19-26, 19-25, 19-24, 19-23, 19-22, 19-21, 19-20, 20-30, 20-29, 20-28, 20-27, 20-26, 20-25, 20-24, 20-23, 20-22, 20-21, 21-30, 21-29, 21-28, 21-27, 21-26, 21-25, 21-24, 21-23, or 21-22 base pairs. Thus, in one embodiment, to the extent that it becomes processed to a functional duplex, of e.g., 15-30 base pairs, that targets a desired RNA for cleavage, an RNA molecule or complex of RNA molecules having a duplex region greater than 30 base pairs is a dsRNA. Thus, an ordinarily skilled artisan will recognize that in one embodiment, a miRNA is a dsRNA. In another embodiment, a dsRNA is not a naturally occurring miRNA. In another embodiment, an iRNA agent useful to target MASP2 gene expression is not generated in the target cell by cleavage of a larger dsRNA.

[0162] A dsRNA as described herein can further include one or more single-stranded nucleotide overhangs e.g., 1-4, 2-4, 1-3, 2-3, 1, 2, 3, or 4 nucleotides. dsRNAs having at least one nucleotide overhang can have superior inhibitory properties relative to their blunt-ended counterparts. A nucleotide overhang can comprise or consist of a nucleotide/nucleoside analog, including a deoxynucleotide/nucleoside. The overhang(s) can be on the sense strand, the antisense strand, or any combination thereof. Furthermore, the nucleotide(s) of an overhang can be present on the 5′-end, 3′-end, or both ends of an antisense or sense strand of a dsRNA.

[0163] A dsRNA can be synthesized by standard methods known in the art. Double stranded RNAi compounds of the invention may be prepared using a two-step procedure. First, the individual strands of the double stranded RNA molecule are prepared separately. Then, the component strands are annealed. The individual strands of the dsRNA compound can be prepared using solution-phase or solid-phase organic synthesis or both. Organic synthesis offers the advantage that the oligonucleotide strands comprising unnatural or modified nucleotides can be easily prepared. Similarly, single-stranded oligonucleotides of the invention can be prepared using solution-phase or solid-phase organic synthesis or both.

[0164] In an aspect, a dsRNA of the invention includes at least two nucleotide sequences, a sense sequence and an anti-sense sequence. The sense strand is selected from the group of sequences provided in any one of Tables 2-7, and the corresponding antisense strand of the sense strand is selected from the group of sequences of any one of Tables 2-7. In this aspect, one of the two sequences is complementary to the other of the two sequences, with one of the sequences being substantially complementary to a sequence of an mRNA generated in the expression of a MASP2 gene. As such, in this aspect, a dsRNA will include two oligonucleotides, where one oligonucleotide is described as the sense strand in any one of Tables 2-7, and the second oligonucleotide is described as the corresponding antisense strand of the sense strand in any one of Tables 2-7. In certain embodiments, the substantially complementary sequences of the dsRNA are contained on separate oligonucleotides. In other embodiments, the substantially complementary sequences of the dsRNA are contained on a single oligonucleotide. In certain embodiments, the sense or antisense strand is selected from the sense or antisense strand of any one of duplexes AD-565541.2, AD-569272.2, AD-569765.2, AD-564730.2, AD-564745.2, AD-571715.2, AD-572041.2, AD-572039.2, AD-568586.2, AD-566837.2, AD-566444.2, AD-567700.2, AD-567814.2, AD-568003.2, AD-569164.2, AD-569763.2, AD-565281.2, AD-571539.2, AD-572389.2, AD-567315.2, AD-571752.2, AD-568026.2, AD-572110.2, AD-572062.2, AD-572388.2, AD-572040.2, AD-567713.2, AD-567521.2, or AD-567066.2.

[0165] It will be understood that, although the sequences in Tables 2, 4, and 6 are not described as modified or conjugated sequences, the RNA of the iRNA of the invention e.g., a dsRNA of the invention, may comprise any one of the sequences set forth in any one of Tables 2-7 that is un-modified, un-conjugated, or modified or conjugated differently than described therein. In other words, the invention encompasses dsRNA of Tables 2-7 which are un-modified, un-conjugated, modified, or conjugated, as described herein.

[0166] The skilled person is well aware that dsRNAs having a duplex structure of about 20 to 23 base pairs, e.g., 21, base pairs have been hailed as particularly effective in inducing RNA interference (Elbashir et al., EMBO 2001, 20:6877-6888). However, others have found that shorter or longer RNA duplex structures can also be effective (Chu and Rana (2007) RNA 14:1714-1719; Kim et al. (2005) Nat Biotech 23:222-226). In the embodiments described above, by virtue of the nature of the oligonucleotide sequences provided in any one of Tables 2-7, dsRNAs described herein can include at least one strand of a length of minimally 21 nucleotides. It can be reasonably expected that shorter duplexes having any one of the sequences in any one of Tables 2-7 minus only a few nucleotides on one or both ends can be similarly effective as compared to the dsRNAs described above. Hence, dsRNAs having a sequence of at least 19, 20, or more contiguous nucleotides derived from any one of the sequences of any one of Tables 2-7, and differing in their ability to inhibit the expression of a MASP2 gene by not more than about 5, 10, 15, 20, 25, or 30% inhibition from a dsRNA comprising the full sequence, are contemplated to be within the scope of the present invention.

[0167] In addition, the RNA agents provided in Tables 2-7 identify a site(s) in a MASP2 mRNA transcript that is susceptible to RISC-mediated cleavage. As such, the present invention further features iRNAs that target within one of these sites. As used herein, an iRNA is said to “target within” a particular site of an mRNA transcript if the iRNA promotes cleavage of the mRNA transcript anywhere within that particular site. Such an iRNA will generally include at least about 19 contiguous nucleotides from any one of the sequences provided in any one of Tables 2-7 coupled to additional nucleotide sequences taken from the region contiguous to the selected sequence in a MASP2 gene.

[0168] In certain embodiments, the RNA of the iRNA of the invention e.g., a dsRNA, is un-modified, and does not comprise modified nucleotides, e.g., chemical modifications or conjugations known in the art and described herein. In other embodiments, the RNA of an iRNA of the invention, e.g., a dsRNA, is chemically modified to enhance stability or other beneficial characteristics. In certain embodiments of the invention, substantially all of the nucleotides of an iRNA of the invention are modified. In other embodiments of the invention, all of the nucleotides of an iRNA or substantially all of the nucleotides of an iRNA are modified, i.e., not more than 5, 4, 3, 2, or 1 unmodified nucleotides are present in a strand of the iRNA.

[0169] The nucleic acids featured in the invention can be synthesized or modified by methods well established in the art, such as those described in “Current protocols in nucleic acid chemistry,” Beaucage, S. L. et al. (Edrs.), John Wiley & Sons, Inc., New York, NY, USA, which is hereby incorporated herein by reference. Modifications include, for example, end modifications, e.g., 5′-end modifications (phosphorylation, conjugation, inverted linkages) or 3′-end modifications (conjugation, DNA nucleotides, inverted linkages, etc.); base modifications, e.g., replacement with stabilizing bases, destabilizing bases, or bases that base pair with an expanded repertoire of partners, removal of bases (abasic nucleotides), or conjugated bases; sugar modifications (e.g., at the 2′-position or 4′-position) or replacement of the sugar; or backbone modifications, including modification or replacement of the phosphodiester linkages. Specific examples of iRNA compounds useful in the embodiments described herein include, but are not limited to RNAs containing modified backbones or no natural internucleoside linkages. RNAs having modified backbones include, among others, those that do not have a phosphorus atom in the backbone. For the purposes of this specification, and as sometimes referenced in the art, modified RNAs that do not have a phosphorus atom in their internucleoside backbone can also be considered to be oligonucleosides. In some embodiments, a modified iRNA will have a phosphorus atom in its internucleoside backbone.

[0170] Modified RNA backbones include, for example, phosphorothioates, chiral phosphorothioates, phosphorodithioates, phosphotriesters, aminoalkylphosphotriesters, methyl and other alkyl phosphonates including 3′-alkylene phosphonates and chiral phosphonates, phosphinates, phosphoramidates including 3′-amino phosphoramidate and aminoalkylphosphoramidates, thionophosphoramidates, thionoalkylphosphonates, thionoalkylphosphotriesters, and boranophosphates having normal 3′-5′ linkages, 2′-5′-linked analogs of these, and those having inverted polarity wherein the adjacent pairs of nucleoside units are linked 3′-5′ to 5′-3′ or 2′-5′ to 5′-2′. Various salts, mixed salts and free acid forms are also included. In some embodiments of the invention, the dsRNA agents of the invention are in a free acid form. In other embodiments of the invention, the dsRNA agents of the invention are in a salt form. In one embodiment, the dsRNA agents of the invention are in a sodium salt form. In certain embodiments, when the dsRNA agents of the invention are in the sodium salt form, sodium ions are present in the agent as counterions for substantially all of the phosphodiester and/or phosphorothiotate groups present in the agent. Agents in which substantially all of the phosphodiester and/or phosphorothioate linkages have a sodium counterion include not more than 5, 4, 3, 2, or 1 phosphodiester and/or phosphorothioate linkages without a sodium counterion. In some embodiments, when the dsRNA agents of the invention are in the sodium salt form, sodium ions are present in the agent as counterions for all of the phosphodiester and/or phosphorothiotate groups present in the agent.

[0171] Representative U.S. Patents that teach the preparation of the above phosphorus-containing linkages include, but are not limited to, U.S. Pat. Nos. 3,687,808; 4,469,863; 4,476,301; 5,023,243; 5,177,195; 5,188,897; 5,264,423; 5,276,019; 5,278,302; 5,286,717; 5,321,131; 5,399,676; 5,405,939; 5,453,496; 5,455,233; 5,466,677; 5,476,925; 5,519,126; 5,536,821; 5,541,316; 5,550,111; 5,563,253; 5,571,799; 5,587,361; 5,625,050; 6,028,188; 6,124,445; 6,160,109; 6,169,170; 6,172,209; 6,239,265; 6,277,603; 6,326,199; 6,346,614; 6,444,423; 6,531,590; 6,534,639; 6,608,035; 6,683,167; 6,858,715; 6,867,294; 6,878,805; 7,015,315; 7,041,816; 7,273,933; 7,321,029; and RE39,464, the entire contents of each of which are hereby incorporated herein by reference.

[0172] Modified RNA backbones that do not include a phosphorus atom therein have backbones that are formed by short chain alkyl or cycloalkyl internucleoside linkages, mixed heteroatoms and alkyl or cycloalkyl internucleoside linkages, or one or more short chain heteroatomic or heterocyclic internucleoside linkages. These include those having morpholino linkages (formed in part from the sugar portion of a nucleoside); siloxane backbones; sulfide, sulfoxide and sulfone backbones; formacetyl and thioformacetyl backbones; methylene formacetyl and thioformacetyl backbones; alkene containing backbones; sulfamate backbones; methyleneimino and methylenehydrazino backbones; sulfonate and sulfonamide backbones; amide backbones; and others having mixed N, O, S, and CH₂ component parts.

[0173] Representative U.S. Patents that teach the preparation of the above oligonucleosides include, but are not limited to, U.S. Pat. Nos. 5,034,506; 5,166,315; 5,185,444; 5,214,134; 5,216,141; 5,235,033; 5,64,562; 5,264,564; 5,405,938; 5,434,257; 5,466,677; 5,470,967; 5,489,677; 5,541,307; 5,561,225; 5,596,086; 5,602,240; 5,608,046; 5,610,289; 5,618,704; 5,623,070; 5,663,312; 5,633,360; 5,677,437; and 5,677,439, the entire contents of each of which are hereby incorporated herein by reference.

[0174] Suitable RNA mimetics are contemplated for use in iRNAs provided herein, in which both the sugar and the internucleoside linkage, i.e., the backbone, of the nucleotide units are replaced with alternate groups. The nucleobase units are maintained for hybridization with an appropriate nucleic acid target compound. One such oligomeric compound in which an RNA mimetic that has been shown to have excellent hybridization properties is referred to as a peptide nucleic acid (PNA). In PNA compounds, the sugar backbone of an RNA is replaced with an amide containing backbone, in particular an aminoethylglycine backbone. The nucleobases are retained and are bound directly or indirectly to aza nitrogen atoms of the amide portion of the backbone. Representative US patents that teach the preparation of PNA compounds include, but are not limited to, U.S. Pat. Nos. 5,539,082; 5,714,331; and 5,719,262, the entire contents of each of which are hereby incorporated herein by reference. Additional PNA compounds suitable for use in the iRNAs of the invention are described in, for example, in Nielsen et al., Science, 1991, 254, 1497-1500.

[0175] Some embodiments featured in the invention include RNAs with phosphorothioate backbones and oligonucleosides with heteroatom backbones, and in particular —CH₂—NH—CH₂—, —CH₂—N(CH₃—O—CH₂-[known as a methylene (methylimino) or MMI backbone], —CH₂—O—N(CH₃)—CH₂—, —CH₂—N(CH₃)—N(CH₃)—CH₂— and —N(CH₃)—CH₂—CH₂— of the above-referenced U.S. Pat. No. 5,489,677, and the amide backbones of the above-referenced U.S. Pat. No. 5,602,240. In some embodiments, the RNAs featured herein have morpholino backbone structures of the above-referenced U.S. Pat. No. 5,034,506. The native phosphodiester backbone can be represented as —O—P(O)(OH)—OCH₂—.

[0176] Modified RNAs can also contain one or more substituted sugar moieties. The iRNAs, e.g., dsRNAs, featured herein can include one of the following at the 2′-position: OH; F; O-, S-, or N-alkyl; O-, S-, or N-alkenyl; O—, S- or N-alkynyl; or O-alkyl-O-alkyl, wherein the alkyl, alkenyl and alkynyl can be substituted or unsubstituted C₁ to C₁₀ alkyl or C₂ to C₁₀ alkenyl and alkynyl. Exemplary suitable modifications include O[(CH₂)_nO]_mCH₃, O(CH₂)_.nOCH₃, O(CH₂)_nNH₂, O(CH₂)_nCH₃, O(CH₂)_nONH₂, and O(CH₂)_nON[(CH₂)_nCH₃)]₂, where n and m are from 1 to about 10. In other embodiments, dsRNAs include one of the following at the 2′ position: C₁ to C₁₀ alkyl, substituted alkyl, alkaryl, aralkyl, O-alkaryl or O-aralkyl, SH, SCH₃, OCN, Cl, Br, CN, CF₃, OCF₃, SOCH₃, SO₂CH₃, ONO₂, NO₂, N₃, NH₂, heterocycloalkyl, heterocycloalkaryl, aminoalkylamino, polyalkylamino, substituted silyl, an RNA cleaving group, a reporter group, an intercalator, a group for improving the pharmacokinetic properties of an iRNA, or a group for improving the pharmacodynamic properties of an iRNA, and other substituents having similar properties. In some embodiments, the modification includes a 2′-methoxyethoxy (2′-O—CH₂CH₂OCH₃, also known as 2′-O-(2-methoxyethyl) or 2′-MOE) (Martin et al., Helv. Chim. Acta, 1995, 78:486-504) i.e., an alkoxy-alkoxy group. Another exemplary modification is 2′-dimethylaminooxyethoxy, i.e., a O(CH₂)₂ON(CH₃)₂ group, also known as 2′-DMAOE, as described in examples herein below, and 2′-dimethylaminoethoxyethoxy (also known in the art as 2′-O-dimethylaminoethoxyethyl or 2′-DMAEOE), i.e., 2′-O—CH₂—O—CH₂—N(CH₃)₂. Further exemplary modifications include: 5′-Me-2′-F nucleotides, 5′-Me-2′-OMe nucleotides, 5′-Me-2′-deoxynucleotides, (both R and S isomers in these three families); 2′-alkoxyalkyl; and 2′-NMA (N-methylacetamide).

[0177] Other modifications include 2′-methoxy (2′-OCH₃), 2′-aminopropoxy (2′-OCH₂CH₂CH₂NH₂) and 2′-fluoro (2′-F). Similar modifications can also be made at other positions on the RNA of an iRNA, particularly the 3′ position of the sugar on the 3′ terminal nucleotide or in 2′-5′ linked dsRNAs and the 5′ position of 5′ terminal nucleotide. iRNAs can also have sugar mimetics such as cyclobutyl moieties in place of the pentofuranosyl sugar. Representative US patents that teach the preparation of such modified sugar structures include, but are not limited to, U.S. Pat. Nos. 4,981,957; 5,118,800; 5,319,080; 5,359,044; 5,393,878; 5,446,137; 5,466,786; 5,514,785; 5,519,134; 5,567,811; 5,576,427; 5,591,722; 5,597,909; 5,610,300; 5,627,053; 5,639,873; 5,646,265; 5,658,873; 5,670,633; and 5,700,920, certain of which are commonly owned with the instant application. The entire contents of each of the foregoing are hereby incorporated herein by reference.

[0178] An iRNA can also include nucleobase (often referred to in the art simply as “base”) modifications or substitutions. As used herein, “unmodified” or “natural” nucleobases include the purine bases adenine (A) and guanine (G), and the pyrimidine bases thymine (T), cytosine (C), and uracil (U). Modified nucleobases include other synthetic and natural nucleobases such as deoxythimidine (dT), 5-methylcytosine (5-me-C), 5-hydroxymethyl cytosine, xanthine, hypoxanthine, 2-aminoadenine, 6-methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 2-thiouracil, 2-thiothymine and 2-thiocytosine, 5-halouracil and cytosine, 5-propynyl uracil and cytosine, 6-azo uracil, cytosine and thymine, 5-uracil (pseudouracil), 4-thiouracil, 8-halo, 8-amino, 8-thiol, 8-thioalkyl, 8-hydroxyl anal other 8-substituted adenines and guanines, 5-halo, particularly 5-bromo, 5-trifluoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine and 7-methyladenine, 8-azaguanine and 8-azaadenine, 7-deazaguanine and 7-daazaadenine and 3-deazaguanine and 3-deazaadenine. Further modified nucleobases include those disclosed in U.S. Pat. No. 3,687,808, those disclosed in Modified Nucleosides in Biochemistry, Biotechnology and Medicine, Herdewijn, P. ed. Wiley-VCH, 2008; those disclosed in The Concise Encyclopedia Of Polymer Science And Engineering, pages 858-859, Kroschwitz, J. L, ed. John Wiley & Sons, 1990, these disclosed by Englisch et al., Angewandte Chemie, International Edition, 1991, 30, 613, and those disclosed by Sanghvi, Y S., Chapter 15, dsRNA Research and Applications, pages 289-302, Crooke, S. T. and Lebleu, B., Ed., CRC Press, 1993. Certain of these modified nucleobases are particularly useful for increasing the binding affinity of the oligomeric compounds featured in the invention. These include 5-substituted pyrimidines, 6-azapyrimidines and N-2, N-6 and 0-6 substituted purines, including 2-aminopropyladenine, 5-propynyluracil and 5-propynylcytosine. 5-methylcytosine substitutions have been shown to increase nucleic acid duplex stability by 0.6-1.2° C. (Sanghvi, Y. S., Crooke, S. T. and Lebleu, B., Eds., dsRNA Research and Applications, CRC Press, Boca Raton, 1993, pp. 276-278) and are exemplary base substitutions, even more particularly when combined with 2′-O-methoxyethyl sugar modifications.

[0179] Representative U.S. Patents that teach the preparation of certain of the above noted modified nucleobases as well as other modified nucleobases include, but are not limited to, the above noted U.S. Pat. Nos. 3,687,808, 4,845,205; 5,130,302; 5,134,066; 5,175,273; 5,367,066; 5,432,272; 5,457,187; 5,459,255; 5,484,908; 5,502,177; 5,525,711; 5,552,540; 5,587,469; 5,594,121, 5,596,091; 5,614,617; 5,681,941; 5,750,692; 6,015,886; 6,147,200; 6,166,197; 6,222,025; 6,235,887; 6,380,368; 6,528,640; 6,639,062; 6,617,438; 7,045,610; 7,427,672; and 7,495,088, the entire contents of each of which are hereby incorporated herein by reference.

[0180] In some embodiments, the RNA of an iRNA can also be modified to include one or more bicyclic sugar moieties. A “bicyclic sugar” is a furanosyl ring modified by the bridging of two atoms. A “bicyclic nucleoside” (“BNA”) is a nucleoside having a sugar moiety comprising a bridge connecting two carbon atoms of the sugar ring, thereby forming a bicyclic ring system. In certain embodiments, the bridge connects the 4′-carbon and the 2′-carbon of the sugar ring. Thus, in some embodiments an agent of the invention may include one or more locked nucleic acids (LNA). A locked nucleic acid is a nucleotide having a modified ribose moiety in which the ribose moiety comprises an extra bridge connecting the 2′ and 4′ carbons. In other words, an LNA is a nucleotide comprising a bicyclic sugar moiety comprising a 4′-CH₂—O-2′ bridge. This structure effectively “locks” the ribose in the 3′-endo structural conformation. The addition of locked nucleic acids to siRNAs has been shown to increase siRNA stability in serum, and to reduce off-target effects (Elmen, J. et al., (2005) Nucleic Acids Research 33(1):439-447; Mook, O R. et al., (2007) Mol Canc Ther 6(3):833-843; Grunweller, A. et al., (2003) Nucleic Acids Research 31(12):3185-3193). Examples of bicyclic nucleosides for use in the polynucleotides of the invention include without limitation nucleosides comprising a bridge between the 4′ and the 2′ ribosyl ring atoms. In certain embodiments, the antisense polynucleotide agents of the invention include one or more bicyclic nucleosides comprising a 4′ to 2′ bridge. Examples of such 4′ to 2′ bridged bicyclic nucleosides, include but are not limited to 4′-(CH₂)—O-2′ (LNA); 4′-(CH₂)—S-2′; 4′-(CH₂)₂—O-2′ (ENA); 4′-CH(CH₃)—O-2′ (also referred to as “constrained ethyl” or “cEt”) and 4′-CH(CH₂OCH₃)—O-2′ (and analogs thereof; see, e.g., U.S. Pat. No. 7,399,845); 4′-C(CH₃)(CH₃)—O-2′ (and analogs thereof; see e.g., U.S. Pat. No. 8,278,283); 4′-CH₂—N(OCH₃)-2′ (and analogs thereof; see e.g., U.S. Pat. No. 8,278,425); 4′-CH₂—O—N(CH₃)-2′ (see, e.g., U.S. Patent Publication No. 2004/0171570); 4′-CH₂—N(R)—O-2′, wherein R is H, C₁-C₁₂ alkyl, or a protecting group (see, e.g., U.S. Pat. No. 7,427,672); 4′-CH₂—C(H)(CH₃)-2′ (see, e.g., Chattopadhyaya et al., J. Org. Chem., 2009, 74, 118-134); and 4′-CH₂—C(H₂)-2′ (and analogs thereof; see, e.g., U.S. Pat. No. 8,278,426). The entire contents of each of the foregoing are hereby incorporated herein by reference.

[0181] Additional representative U.S. Patents and U.S. Patent Publications that teach the preparation of locked nucleic acid nucleotides include, but are not limited to, the following: U.S. Pat. Nos. 6,268,490; 6,525,191; 6,670,461; 6,770,748; 6,794,499; 6,998,484; 7,053,207; 7,034,133; 7,084,125; 7,399,845; 7,427,672; 7,569,686; 7,741,457; 8,022,193; 8,030,467; 8,278,425; 8,278,426; 8,278,283; US 2008/0039618; and US 2009/0012281, the entire contents of each of which are hereby incorporated herein by reference.

[0182] Any of the foregoing bicyclic nucleosides can be prepared having one or more stereochemical sugar configurations including for example α-L-ribofuranose and β-D-ribofuranose (see WO 99/14226).

[0183] The RNA of an iRNA can also be modified to include one or more constrained ethyl nucleotides. As used herein, a “constrained ethyl nucleotide” or “cEt” is a locked nucleic acid comprising a bicyclic sugar moiety comprising a 4′-CH(CH₃)—O-2′ bridge. In one embodiment, a constrained ethyl nucleotide is in the S conformation referred to herein as “S-cEt.”

[0184] An iRNA of the invention may also include one or more “conformationally restricted nucleotides” (“CRN”). CRN are nucleotide analogs with a linker connecting the C2′ and C4′ carbons of ribose or the C3′ and —C5′ carbons of ribose. CRN lock the ribose ring into a stable conformation and increase the hybridization affinity to mRNA. The linker is of sufficient length to place the oxygen in an optimal position for stability and affinity resulting in less ribose ring puckering.

[0185] Representative publications that teach the preparation of certain of the above noted CRN include, but are not limited to, U.S. Patent Publication No. 2013/0190383; and PCT publication WO 2013/036868, the entire contents of each of which are hereby incorporated herein by reference.

[0186] In some embodiments, an iRNA of the invention comprises one or more monomers that are UNA (unlocked nucleic acid) nucleotides. UNA is unlocked acyclic nucleic acid, wherein any of the bonds of the sugar has been removed, forming an unlocked “sugar” residue. In one example, UNA also encompasses monomer with bonds between C1′-C4′ have been removed (i.e. the covalent carbon-oxygen-carbon bond between the C1′ and C4′ carbons). In another example, the C2′-C3′ bond (i.e. the covalent carbon-carbon bond between the C2′ and C3′ carbons) of the sugar has been removed (see Nuc. Acids Symp. Series, 52, 133-134 (2008) and Fluiter et al., Mol. Biosyst., 2009, 10, 1039 hereby incorporated by reference).

[0187] Representative U.S. publications that teach the preparation of UNA include, but are not limited to, U.S. Pat. No. 8,314,227; and U.S. Patent Publication Nos. 2013/0096289; 2013/0011922; and 2011/0313020, the entire contents of each of which are hereby incorporated herein by reference.

[0188] An RNAi agent of the disclosure may also include one or more “cyclohexene nucleic acids” or (“CeNA”). CeNA are nucleotide analogs with a replacement of the furanose moiety of DNA by a cyclohexene ring. Incorporation of cylcohexenyl nucleosides in a DNA chain increases the stability of a DNA/RNA hybrid. CeNA is stable against degradation in serum and a CeNA/RNA hybrid is able to activate E. Coli RNase H, resulting in cleavage of the RNA strand. (see Wang et al., Am. Chem. Soc. 2000, 122, 36, 8595-8602, hereby incorporated by reference).

[0189] Potentially stabilizing modifications to the ends of RNA molecules can include N-(acetylaminocaproyl)-4-hydroxyprolinol (Hyp-C6-NHAc), N-(caproyl-4-hydroxyprolinol (Hyp-C6), N-(acetyl-4-hydroxyprolinol (Hyp-NHAc), thymidine-2′-O-deoxythymidine (ether), N-(aminocaproyl)-4-hydroxyprolinol (Hyp-C6-amino), 2-docosanoyl-uridine-3″-phosphate, inverted base dT(idT) and others. Disclosure of this modification can be found in PCT Publication No. WO 2011/005861.

[0190] Other modifications of the nucleotides of an iRNA of the invention include a 5′ phosphate or 5′ phosphate mimic, e.g., a 5′-terminal phosphate or phosphate mimic on the antisense strand of an iRNA. Suitable phosphate mimics are disclosed in, for example U.S. Patent Publication No. 2012/0157511, the entire contents of which are incorporated herein by reference.

A. Modified iRNAs Comprising Motifs of the Invention

[0191] In certain aspects of the invention, the double stranded RNA agents of the invention include agents with chemical modifications as disclosed, for example, in WO2013/075035, the entire contents of each of which are incorporated herein by reference. WO2013/075035 provides motifs of three identical modifications on three consecutive nucleotides into a sense strand or antisense strand of a dsRNAi agent, particularly at or near the cleavage site. In some embodiments, the sense strand and antisense strand of the dsRNAi agent may otherwise be completely modified. The introduction of these motifs interrupts the modification pattern, if present, of the sense or antisense strand. The dsRNAi agent may be optionally conjugated with a GalNAc derivative ligand, for instance on the sense strand.

[0192] More specifically, when the sense strand and antisense strand of the double stranded RNA agent are completely modified to have one or more motifs of three identical modifications on three consecutive nucleotides at or near the cleavage site of at least one strand of a dsRNAi agent, the gene silencing activity of the dsRNAi agent was observed.

[0193] Accordingly, the invention provides double stranded RNA agents capable of inhibiting the expression of a target gene (i.e., MASP2 gene) in vivo. The RNAi agent comprises a sense strand and an antisense strand. Each strand of the RNAi agent may be, for example, 17-30 nucleotides in length, 25-30 nucleotides in length, 27-30 nucleotides in length, 19-25 nucleotides in length, 19-23 nucleotides in length, 19-21 nucleotides in length, 21-25 nucleotides in length, or 21-23 nucleotides in length.

[0194] The sense strand and antisense strand typically form a duplex double stranded RNA (“dsRNA”), also referred to herein as “dsRNAi agent.” The duplex region of a dsRNAi agent may be, for example, the duplex region can be 27-30 nucleotide pairs in length, 19-25 nucleotide pairs in length, 19-23 nucleotide pairs in length, 19-21 nucleotide pairs in length, 21-25 nucleotide pairs in length, or 21-23 nucleotide pairs in length. In another example, the duplex region is selected from 19, 20, 21, 22, 23, 24, 25, 26, and 27 nucleotides in length.

[0195] In certain embodiments, the dsRNAi agent may contain one or more overhang regions or capping groups at the 3′-end, 5′-end, or both ends of one or both strands. The overhang can be, independently, 1-6 nucleotides in length, for instance 2-6 nucleotides in length, 1-5 nucleotides in length, 2-5 nucleotides in length, 1-4 nucleotides in length, 2-4 nucleotides in length, 1-3 nucleotides in length, 2-3 nucleotides in length, or 1-2 nucleotides in length. In certain embodiments, the overhang regions can include extended overhang regions as provided above. The overhangs can be the result of one strand being longer than the other, or the result of two strands of the same length being staggered. The overhang can form a mismatch with the target mRNA or it can be complementary to the gene sequences being targeted or can be another sequence. The first and second strands can also be joined, e.g., by additional bases to form a hairpin, or by other non-base linkers.

[0196] In certain embodiments, the nucleotides in the overhang region of the dsRNAi agent can each independently be a modified or unmodified nucleotide including, but no limited to 2′-sugar modified, such as, 2′-F, 2′-O-methyl, thymidine (T), 2′-O-methoxyethyl-5-methyluridine (Teo), 2′-O-methoxyethyladenosine (Aeo), 2′-O-methoxyethyl-5-methylcytidine (m5Ceo), and any combinations thereof. For example, TT can be an overhang sequence for either end on either strand. The overhang can form a mismatch with the target mRNA or it can be complementary to the gene sequences being targeted or can be another sequence.

[0197] The 5′- or 3′-overhangs at the sense strand, antisense strand, or both strands of the dsRNAi agent may be phosphorylated. In some embodiments, the overhang region(s) contains two nucleotides having a phosphorothioate between the two nucleotides, where the two nucleotides can be the same or different. In some embodiments, the overhang is present at the 3′-end of the sense strand, antisense strand, or both strands. In some embodiments, this 3′-overhang is present in the antisense strand. In some embodiments, this 3′-overhang is present in the sense strand.

[0198] The dsRNAi agent may contain only a single overhang, which can strengthen the interference activity of the RNAi, without affecting its overall stability. For example, the single-stranded overhang may be located at the 3′-end of the sense strand or, alternatively, at the 3′-end of the antisense strand. The RNAi may also have a blunt end, located at the 5′-end of the antisense strand (i.e., the 3′-end of the sense strand) or vice versa. Generally, the antisense strand of the dsRNAi agent has a nucleotide overhang at the 3′-end, and the 5′-end is blunt. While not wishing to be bound by theory, the asymmetric blunt end at the 5′-end of the antisense strand and 3′-end overhang of the antisense strand favor the guide strand loading into RISC process.

[0199] In certain embodiments, the dsRNAi agent is a double blunt-ended of 19 nucleotides in length, wherein the sense strand contains at least one motif of three 2′-F modifications on three consecutive nucleotides at positions 7, 8, and 9 from the 5′end. The antisense strand contains at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at positions 11, 12, and 13 from the 5′end.

[0200] In other embodiments, the dsRNAi agent is a double blunt-ended of 20 nucleotides in length, wherein the sense strand contains at least one motif of three 2′-F modifications on three consecutive nucleotides at positions 8, 9, and 10 from the 5′end. The antisense strand contains at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at positions 11, 12, and 13 from the 5′end.

[0201] In yet other embodiments, the dsRNAi agent is a double blunt-ended of 21 nucleotides in length, wherein the sense strand contains at least one motif of three 2′-F modifications on three consecutive nucleotides at positions 9, 10, and 11 from the 5′ end. The antisense strand contains at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at positions 11, 12, and 13 from the 5′end.

[0202] In certain embodiments, the dsRNAi agent comprises a 21 nucleotide sense strand and a 23 nucleotide antisense strand, wherein the sense strand contains at least one motif of three 2′-F modifications on three consecutive nucleotides at positions 9, 10, and 11 from the 5′end; the antisense strand contains at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at positions 11, 12, and 13 from the 5′ end, wherein one end of the RNAi agent is blunt, while the other end comprises a 2 nucleotide overhang. The 2 nucleotide overhang can be at the 3′-end of the antisense strand.

[0203] When the 2 nucleotide overhang is at the 3′-end of the antisense strand, there may be two phosphorothioate internucleotide linkages between the terminal three 3′-nucleotides of the antisense strand, wherein two of the three nucleotides are the overhang nucleotides, and the third nucleotide is a paired nucleotide next to the overhang nucleotide. In one embodiment, the RNAi agent additionally has two phosphorothioate internucleotide linkages between the terminal three nucleotides at both the 5′-end of the sense strand and at the 5′-end of the antisense strand. In certain embodiments, every nucleotide in the sense strand and the antisense strand of the dsRNAi agent, including the nucleotides that are part of the motifs are modified nucleotides. In certain embodiments each residue is independently modified with a 2′-O-methyl or 2′-fluoro, e.g., in an alternating motif. Optionally, the dsRNAi agent further comprises a ligand (such as, GalNAc₃).

[0204] In certain embodiments, the dsRNAi agent comprises a sense and an antisense strand, wherein the sense strand is 25-30 nucleotide residues in length, wherein starting from the 5′ terminal nucleotide (position 1) positions 1 to 23 of the first strand comprise at least 8 ribonucleotides; the antisense strand is 36-66 nucleotide residues in length and, starting from the 3′ terminal nucleotide, comprises at least 8 ribonucleotides in the positions paired with positions 1-23 of sense strand to form a duplex; wherein at least the 3 ‘ terminal nucleotide of antisense strand is unpaired with sense strand, and up to 6 consecutive 3’ terminal nucleotides are unpaired with sense strand, thereby forming a 3′ single stranded overhang of 1-6 nucleotides; wherein the 5′ terminus of antisense strand comprises from 10-30 consecutive nucleotides which are unpaired with sense strand, thereby forming a 10-30 nucleotide single stranded 5′ overhang; wherein at least the sense strand 5′ terminal and 3′ terminal nucleotides are base paired with nucleotides of antisense strand when sense and antisense strands are aligned for maximum complementarity, thereby forming a substantially duplexed region between sense and antisense strands; and antisense strand is sufficiently complementary to a target RNA along at least 19 ribonucleotides of antisense strand length to reduce target gene expression when the double stranded nucleic acid is introduced into a mammalian cell; and wherein the sense strand contains at least one motif of three 2′-F modifications on three consecutive nucleotides, where at least one of the motifs occurs at or near the cleavage site. The antisense strand contains at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at or near the cleavage site.

[0205] In certain embodiments, the dsRNAi agent comprises sense and antisense strands, wherein the dsRNAi agent comprises a first strand having a length which is at least 25 and at most 29 nucleotides and a second strand having a length which is at most 30 nucleotides with at least one motif of three 2′-O-methyl modifications on three consecutive nucleotides at position 11, 12, and 13 from the 5′ end; wherein the 3′ end of the first strand and the 5′ end of the second strand form a blunt end and the second strand is 1-4 nucleotides longer at its 3′ end than the first strand, wherein the duplex region which is at least 25 nucleotides in length, and the second strand is sufficiently complementary to a target mRNA along at least 19 nucleotide of the second strand length to reduce target gene expression when the RNAi agent is introduced into a mammalian cell, and wherein Dicer cleavage of the dsRNAi agent preferentially results in an siRNA comprising the 3′-end of the second strand, thereby reducing expression of the target gene in the mammal Optionally, the dsRNAi agent further comprises a ligand.

[0206] In certain embodiments, the sense strand of the dsRNAi agent contains at least one motif of three identical modifications on three consecutive nucleotides, where one of the motifs occurs at the cleavage site in the sense strand.

[0207] In certain embodiments, the antisense strand of the dsRNAi agent can also contain at least one motif of three identical modifications on three consecutive nucleotides, where one of the motifs occurs at or near the cleavage site in the antisense strand.

[0208] For a dsRNAi agent having a duplex region of 19-23 nucleotides in length, the cleavage site of the antisense strand is typically around the 10, 11, and 12 positions from the 5′-end. Thus the motifs of three identical modifications may occur at the 9, 10, and 11 positions; the 10, 11, and 12 positions; the 11, 12, and 13 positions; the 12, 13, and 14 positions; or the 13, 14, and 15 positions of the antisense strand, the count starting from the first nucleotide from the 5′-end of the antisense strand, or, the count starting from the first paired nucleotide within the duplex region from the 5′-end of the antisense strand. The cleavage site in the antisense strand may also change according to the length of the duplex region of the dsRNAi agent from the 5′-end.

[0209] The sense strand of the dsRNAi agent may contain at least one motif of three identical modifications on three consecutive nucleotides at the cleavage site of the strand; and the antisense strand may have at least one motif of three identical modifications on three consecutive nucleotides at or near the cleavage site of the strand. When the sense strand and the antisense strand form a dsRNA duplex, the sense strand and the antisense strand can be so aligned that one motif of the three nucleotides on the sense strand and one motif of the three nucleotides on the antisense strand have at least one nucleotide overlap, i.e., at least one of the three nucleotides of the motif in the sense strand forms a base pair with at least one of the three nucleotides of the motif in the antisense strand. Alternatively, at least two nucleotides may overlap, or all three nucleotides may overlap.

[0210] In some embodiments, the sense strand of the dsRNAi agent may contain more than one motif of three identical modifications on three consecutive nucleotides. The first motif may occur at or near the cleavage site of the strand and the other motifs may be a wing modification. The term “wing modification” herein refers to a motif occurring at another portion of the strand that is separated from the motif at or near the cleavage site of the same strand. The wing modification is either adjacent to the first motif or is separated by at least one or more nucleotides. When the motifs are immediately adjacent to each other then the chemistries of the motifs are distinct from each other, and when the motifs are separated by one or more nucleotide than the chemistries can be the same or different. Two or more wing modifications may be present. For instance, when two wing modifications are present, each wing modification may occur at one end relative to the first motif which is at or near cleavage site or on either side of the lead motif.

[0211] Like the sense strand, the antisense strand of the dsRNAi agent may contain more than one motifs of three identical modifications on three consecutive nucleotides, with at least one of the motifs occurring at or near the cleavage site of the strand. This antisense strand may also contain one or more wing modifications in an alignment similar to the wing modifications that may be present on the sense strand.

[0212] In some embodiments, the wing modification on the sense strand or antisense strand of the dsRNAi agent typically does not include the first one or two terminal nucleotides at the 3′-end, 5′-end, or both ends of the strand.

[0213] In other embodiments, the wing modification on the sense strand or antisense strand of the dsRNAi agent typically does not include the first one or two paired nucleotides within the duplex region at the 3′-end, 5′-end, or both ends of the strand.

[0214] When the sense strand and the antisense strand of the dsRNAi agent each contain at least one wing modification, the wing modifications may fall on the same end of the duplex region, and have an overlap of one, two, or three nucleotides.

[0215] When the sense strand and the antisense strand of the dsRNAi agent each contain at least two wing modifications, the sense strand and the antisense strand can be so aligned that two modifications each from one strand fall on one end of the duplex region, having an overlap of one, two, or three nucleotides; two modifications each from one strand fall on the other end of the duplex region, having an overlap of one, two or three nucleotides; two modifications one strand fall on each side of the lead motif, having an overlap of one, two or three nucleotides in the duplex region.

[0216] In some embodiments, every nucleotide in the sense strand and antisense strand of the dsRNAi agent, including the nucleotides that are part of the motifs, may be modified. Each nucleotide may be modified with the same or different modification which can include one or more alteration of one or both of the non-linking phosphate oxygens or of one or more of the linking phosphate oxygens; alteration of a constituent of the ribose sugar, e.g., of the 2′-hydroxyl on the ribose sugar; wholesale replacement of the phosphate moiety with “dephospho” linkers; modification or replacement of a naturally occurring base; and replacement or modification of the ribose-phosphate backbone.

[0217] As nucleic acids are polymers of subunits, many of the modifications occur at a position which is repeated within a nucleic acid, e.g., a modification of a base, or a phosphate moiety, or a non-linking 0 of a phosphate moiety. In some cases, the modification will occur at all of the subject positions in the nucleic acid but in many cases it will not. By way of example, a modification may only occur at a 3′- or 5′ terminal position, may only occur in a terminal region, e.g., at a position on a terminal nucleotide or in the last 2, 3, 4, 5, or 10 nucleotides of a strand. A modification may occur in a double strand region, a single strand region, or in both. A modification may occur only in the double strand region of an RNA or may only occur in a single strand region of a RNA. For example, a phosphorothioate modification at a non-linking 0 position may only occur at one or both termini, may only occur in a terminal region, e.g., at a position on a terminal nucleotide or in the last 2, 3, 4, 5, or 10 nucleotides of a strand, or may occur in double strand and single strand regions, particularly at termini. The 5′-end or ends can be phosphorylated.

[0218] It may be possible, e.g., to enhance stability, to include particular bases in overhangs, or to include modified nucleotides or nucleotide surrogates, in single strand overhangs, e.g., in a 5′- or 3′-overhang, or in both. For example, it can be desirable to include purine nucleotides in overhangs. In some embodiments all or some of the bases in a 3′- or 5′-overhang may be modified, e.g., with a modification described herein. Modifications can include, e.g., the use of modifications at the 2′ position of the ribose sugar with modifications that are known in the art, e.g., the use of deoxyribonucleotides, 2′-deoxy-2′-fluoro (2′-F) or 2′-O-methyl modified instead of the ribosugar of the nucleobase, and modifications in the phosphate group, e.g., phosphorothioate modifications. Overhangs need not be homologous with the target sequence.

[0219] In some embodiments, each residue of the sense strand and antisense strand is independently modified with LNA, CRN, cET, UNA, HNA, CeNA, 2′-methoxyethyl, 2′-O-methyl, 2′-O-allyl, 2′-C-allyl, 2′-deoxy, 2′-hydroxyl, or 2′-fluoro. The strands can contain more than one modification. In one embodiment, each residue of the sense strand and antisense strand is independently modified with 2′-O-methyl or 2′-fluoro.

[0220] At least two different modifications are typically present on the sense strand and antisense strand. Those two modifications may be the 2′-O-methyl or 2′-fluoro modifications, or others.

[0221] In certain embodiments, the N_a or N_b comprise modifications of an alternating pattern. The term “alternating motif” as used herein refers to a motif having one or more modifications, each modification occurring on alternating nucleotides of one strand. The alternating nucleotide may refer to one per every other nucleotide or one per every three nucleotides, or a similar pattern. For example, if A, B and C each represent one type of modification to the nucleotide, the alternating motif can be “ABABABABABAB . . . ,” “AABBAABBAABB . . . ,” “AABAABAABAAB . . . ,” “AAABAAABAAAB . . . ,” “AAABBBAAABBB . . . ,” or “ABCABCABCABC . . . ,” etc.

[0222] The type of modifications contained in the alternating motif may be the same or different. For example, if A, B, C, D each represent one type of modification on the nucleotide, the alternating pattern, i.e., modifications on every other nucleotide, may be the same, but each of the sense strand or antisense strand can be selected from several possibilities of modifications within the alternating motif such as “ABABAB . . . ”, “ACACAC . . . ” “BDBDBD . . . ” or “CDCDCD . . . ,” etc.

[0223] In some embodiments, the dsRNAi agent of the invention comprises the modification pattern for the alternating motif on the sense strand relative to the modification pattern for the alternating motif on the antisense strand is shifted. The shift may be such that the modified group of nucleotides of the sense strand corresponds to a differently modified group of nucleotides of the antisense strand and vice versa. For example, the sense strand when paired with the antisense strand in the dsRNA duplex, the alternating motif in the sense strand may start with “ABABAB” from 5′ to 3′ of the strand and the alternating motif in the antisense strand may start with “BABABA” from 5′ to 3′ of the strand within the duplex region. As another example, the alternating motif in the sense strand may start with “AABBAABB” from 5′ to 3′ of the strand and the alternating motif in the antisense strand may start with “BBAABBAA” from 5′ to 3′ of the strand within the duplex region, so that there is a complete or partial shift of the modification patterns between the sense strand and the antisense strand.

[0224] In some embodiments, the dsRNAi agent comprises the pattern of the alternating motif of 2′-O-methyl modification and 2′-F modification on the sense strand initially has a shift relative to the pattern of the alternating motif of 2′-O-methyl modification and 2′-F modification on the antisense strand initially, i.e., the 2′-O-methyl modified nucleotide on the sense strand base pairs with a 2′-F modified nucleotide on the antisense strand and vice versa. The 1 position of the sense strand may start with the 2′-F modification, and the 1 position of the antisense strand may start with the 2′-O-methyl modification.

[0225] The introduction of one or more motifs of three identical modifications on three consecutive nucleotides to the sense strand or antisense strand interrupts the initial modification pattern present in the sense strand or antisense strand. This interruption of the modification pattern of the sense or antisense strand by introducing one or more motifs of three identical modifications on three consecutive nucleotides to the sense or antisense strand may enhance the gene silencing activity against the target gene.

[0226] In some embodiments, when the motif of three identical modifications on three consecutive nucleotides is introduced to any of the strands, the modification of the nucleotide next to the motif is a different modification than the modification of the motif. For example, the portion of the sequence containing the motif is “ . . . N_aYYN_b . . . ,” where “Y” represents the modification of the motif of three identical modifications on three consecutive nucleotides, and “N_a” and “N_b” represent a modification to the nucleotide next to the motif “YYY” that is different than the modification of Y, and where N_a and N_b can be the same or different modifications. Alternatively, N_a or N_b may be present or absent when there is a wing modification present.

[0227] The iRNA may further comprise at least one phosphorothioate or methylphosphonate internucleotide linkage. The phosphorothioate or methylphosphonate internucleotide linkage modification may occur on any nucleotide of the sense strand, antisense strand, or both strands in any position of the strand. For instance, the internucleotide linkage modification may occur on every nucleotide on the sense strand or antisense strand; each internucleotide linkage modification may occur in an alternating pattern on the sense strand or antisense strand; or the sense strand or antisense strand may contain both internucleotide linkage modifications in an alternating pattern. The alternating pattern of the internucleotide linkage modification on the sense strand may be the same or different from the antisense strand, and the alternating pattern of the internucleotide linkage modification on the sense strand may have a shift relative to the alternating pattern of the internucleotide linkage modification on the antisense strand. In one embodiment, a double-stranded RNAi agent comprises 6-8 phosphorothioate internucleotide linkages. In some embodiments, the antisense strand comprises two phosphorothioate internucleotide linkages at the 5′-end and two phosphorothioate internucleotide linkages at the 3′-end, and the sense strand comprises at least two phosphorothioate internucleotide linkages at either the 5′-end or the 3′-end.

[0228] In some embodiments, the dsRNAi agent comprises a phosphorothioate or methylphosphonate internucleotide linkage modification in the overhang region. For example, the overhang region may contain two nucleotides having a phosphorothioate or methylphosphonate internucleotide linkage between the two nucleotides. Internucleotide linkage modifications also may be made to link the overhang nucleotides with the terminal paired nucleotides within the duplex region. For example, at least 2, 3, 4, or all the overhang nucleotides may be linked through phosphorothioate or methylphosphonate internucleotide linkage, and optionally, there may be additional phosphorothioate or methylphosphonate internucleotide linkages linking the overhang nucleotide with a paired nucleotide that is next to the overhang nucleotide. For instance, there may be at least two phosphorothioate internucleotide linkages between the terminal three nucleotides, in which two of the three nucleotides are overhang nucleotides, and the third is a paired nucleotide next to the overhang nucleotide. These terminal three nucleotides may be at the 3′-end of the antisense strand, the 3′-end of the sense strand, the 5′-end of the antisense strand, or the 5′end of the antisense strand.

[0229] In some embodiments, the 2-nucleotide overhang is at the 3′-end of the antisense strand, and there are two phosphorothioate internucleotide linkages between the terminal three nucleotides, wherein two of the three nucleotides are the overhang nucleotides, and the third nucleotide is a paired nucleotide next to the overhang nucleotide. Optionally, the dsRNAi agent may additionally have two phosphorothioate internucleotide linkages between the terminal three nucleotides at both the 5′-end of the sense strand and at the 5′-end of the antisense strand.

[0230] In one embodiment, the dsRNAi agent comprises mismatch(es) with the target, within the duplex, or combinations thereof. The mismatch may occur in the overhang region or the duplex region. The base pair may be ranked on the basis of their propensity to promote dissociation or melting (e.g., on the free energy of association or dissociation of a particular pairing, the simplest approach is to examine the pairs on an individual pair basis, though next neighbor or similar analysis can also be used). In terms of promoting dissociation: A:U is preferred over G:C; G:U is preferred over G:C; and I:C is preferred over G:C (I=inosine). Mismatches, e.g., non-canonical or other than canonical pairings (as described elsewhere herein) are preferred over canonical (A:T, A:U, G:C) pairings; and pairings which include a universal base are preferred over canonical pairings.

[0231] In certain embodiments, the dsRNAi agent comprises at least one of the first 1, 2, 3, 4, or 5 base pairs within the duplex regions from the 5′-end of the antisense strand independently selected from the group of: A:U, G:U, I:C, and mismatched pairs, e.g., non-canonical or other than canonical pairings or pairings which include a universal base, to promote the dissociation of the antisense strand at the 5′-end of the duplex.

[0232] In certain embodiments, the nucleotide at the 1 position within the duplex region from the 5′-end in the antisense strand is selected from A, dA, dU, U, and dT. Alternatively, at least one of the first 1, 2, or 3 base pair within the duplex region from the 5′-end of the antisense strand is an AU base pair. For example, the first base pair within the duplex region from the 5′-end of the antisense strand is an AU base pair.

[0233] In other embodiments, the nucleotide at the 3′-end of the sense strand is deoxythimidine (dT) or the nucleotide at the 3′-end of the antisense strand is deoxythimidine (dT). For example, there is a short sequence of deoxythimidine nucleotides, for example, two dT nucleotides on the 3′-end of the sense, antisense strand, or both strands.

[0234] In certain embodiments, the sense strand sequence may be represented by formula (I):
5′n_p-N_a-(XXX)_i-N_b-YYY-N_b-(ZZZ)_j-N_a-n_q3′  (I)

• • [0235] wherein:
  • [0236] i and j are each independently 0 or 1;
  • [0237] p and q are each independently 0-6;
  • [0238] each N_a independently represents an oligonucleotide sequence comprising 0-25 modified nucleotides, each sequence comprising at least two differently modified nucleotides;
  • [0239] each N_b independently represents an oligonucleotide sequence comprising 0-10 modified nucleotides;
  • [0240] each n_p and n_q independently represent an overhang nucleotide;
  • [0241] wherein N_b and Y do not have the same modification; and
  • [0242] XXX, YYY, and ZZZ each independently represent one motif of three identical modifications on three consecutive nucleotides. In one embodiment, YYY is all 2′-F modified nucleotides.

[0243] In some embodiments, the N_a or N_b comprises modifications of alternating pattern.

[0244] In some embodiments, the YYY motif occurs at or near the cleavage site of the sense strand. For example, when the dsRNAi agent has a duplex region of 17-23 nucleotides in length, the YYY motif can occur at or the vicinity of the cleavage site (e.g.: can occur at positions 6, 7, 8; 7, 8, 9; 8, 9, 10; 9, 10, 11; 10, 11, 12; or 11, 12, 13) of the sense strand, the count starting from the first nucleotide, from the 5′-end; or optionally, the count starting at the first paired nucleotide within the duplex region, from the 5′-end.

[0245] In one embodiment, i is 1 and j is 0, or i is 0 and j is 1, or both i and j are 1. The sense strand can therefore be represented by the following formulas:
5′n_p-N_a-YYY-N_b-ZZZ-N_a-n_q3′  (Ib);
5′n_p-N_a-XXX-N_b-YYY-N_a-n_q3′  (Ic); or
5′n_p-N_a-XXX-N_b-YYY-N_b-ZZZ-N_a-n_q3′  (Id).

[0246] When the sense strand is represented by formula (Ib), N_b represents an oligonucleotide sequence comprising 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a independently can represent an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0247] When the sense strand is represented as formula (Ic), N_b represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a can independently represent an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0248] When the sense strand is represented as formula (Id), each N_b independently represents an oligonucleotide sequence comprising 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. In certain embodiments, N_b is 0, 1, 2, 3, 4, 5, or 6. Each N_a can independently represent an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0249] Each of X, Y and Z may be the same or different from each other.

[0250] In other embodiments, i is 0 and j is 0, and the sense strand may be represented by the formula:
5′n_p-N_a-YYY-N_a-n_q3′  (Ia).

[0251] When the sense strand is represented by formula (Ia), each N_a independently can represent an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0252] In one embodiment, the antisense strand sequence of the RNAi may be represented by formula (II):
5′n_q′-N_a′-(Z′Z′Z′)_k-N_b′-Y′Y′Y′-N_b′-(X′X′X′)_l-N′_a-n_p′3′  (II)

• • [0253] wherein:
  • [0254] k and l are each independently 0 or 1;
  • [0255] p′ and q′ are each independently 0-6;
  • [0256] each N_a′ independently represents an oligonucleotide sequence comprising 0-25 modified nucleotides, each sequence comprising at least two differently modified nucleotides;
  • [0257] each N_b′ independently represents an oligonucleotide sequence comprising 0-10 modified nucleotides;
  • [0258] each n_p′ and n_q′ independently represent an overhang nucleotide;
  • [0259] wherein N_b′ and Y′ do not have the same modification; and
  • [0260] X′X′X′, Y′Y′Y′, and Z′Z′Z′ each independently represent one motif of three identical modifications on three consecutive nucleotides.

[0261] In some embodiments, the N_a′ or N_b′ comprises modifications of alternating pattern.

[0262] The Y′Y′Y′ motif occurs at or near the cleavage site of the antisense strand. For example, when the dsRNAi agent has a duplex region of 17-23 nucleotides in length, the Y′Y′Y′ motif can occur at positions 9, 10, 11; 10, 11, 12; 11, 12, 13; 12, 13, 14; or 13, 14, 15 of the antisense strand, with the count starting from the first nucleotide, from the 5′-end; or optionally, the count starting at the first paired nucleotide within the duplex region, from the 5′-end. In certain embodiments, the Y′Y′Y′ motif occurs at positions 11, 12, 13.

[0263] In certain embodiments, Y′Y′Y′ motif is all 2′-OMe modified nucleotides.

[0264] In certain embodiments, k is 1 and 1 is 0, or k is 0 and 1 is 1, or both k and 1 are 1.

[0265] The antisense strand can therefore be represented by the following formulas:
5′n_q′-N_a′-Z′Z′Z′-N_b′-Y′Y′Y′-N_a′-n_p′3′  (IIb);
5′n_q′-N_a′-Y′Y′Y′-N_b′-X′X′X′-n_p′3′  (IIc); or
5′n_q′-N_a′-Z′Z′Z′-N_b′-Y′Y′Y′-N_b′-X′X′X′-N_a′-n_p′3′  (IId).

[0266] When the antisense strand is represented by formula (IIb), N_b′ represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a′ independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0267] When the antisense strand is represented as formula (IIC), N_b′ represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a′ independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0268] When the antisense strand is represented as formula (IId), each N_b′ independently represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a′ independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides. In certain embodiments, N_b is 0, 1, 2, 3, 4, 5, or 6.

[0269] In other embodiments, k is 0 and 1 is 0 and the antisense strand may be represented by the formula:
5′n_p′-N_a′-Y′Y′Y′-N_a′-n_q′3′  (Ia).

[0270] When the antisense strand is represented as formula (IIa), each N_a′ independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides. Each of X′, Y′ and Z′ may be the same or different from each other.

[0271] Each nucleotide of the sense strand and antisense strand may be independently modified with LNA, CRN, UNA, cEt, HNA, CeNA, 2′-methoxyethyl, 2′-O-methyl, 2′-O-allyl, 2′-C-allyl, 2′-hydroxyl, or 2′-fluoro. For example, each nucleotide of the sense strand and antisense strand is independently modified with 2′-O-methyl or 2′-fluoro. Each X, Y, Z, X′, Y′, and Z′, in particular, may represent a 2′-O-methyl modification or a 2′-fluoro modification.

[0272] In some embodiments, the sense strand of the dsRNAi agent may contain YYY motif occurring at 9, 10, and 11 positions of the strand when the duplex region is 21 nt, the count starting from the first nucleotide from the 5′-end, or optionally, the count starting at the first paired nucleotide within the duplex region, from the 5′-end; and Y represents 2′-F modification. The sense strand may additionally contain XXX motif or ZZZ motifs as wing modifications at the opposite end of the duplex region; and XXX and ZZZ each independently represents a 2′-OMe modification or 2′-F modification.

[0273] In some embodiments the antisense strand may contain Y′Y′Y′ motif occurring at positions 11, 12, 13 of the strand, the count starting from the first nucleotide from the 5′-end, or optionally, the count starting at the first paired nucleotide within the duplex region, from the 5′-end; and Y′ represents 2′-O-methyl modification. The antisense strand may additionally contain X′X′X′ motif or Z′Z′Z′ motifs as wing modifications at the opposite end of the duplex region; and X′X′X′ and Z′Z′Z′ each independently represents a 2′-OMe modification or 2′-F modification.

[0274] The sense strand represented by any one of the above formulas (Ia), (Ib), (Ic), and (Id) forms a duplex with an antisense strand being represented by any one of formulas (Ha), (IIb), (IIc), and (IId), respectively.

[0275] Accordingly, the dsRNAi agents for use in the methods of the invention may comprise a sense strand and an antisense strand, each strand having 14 to 30 nucleotides, the iRNA duplex represented by formula (III):
sense: 5′n_p-N_a-(XXX)_i-N_b-YYY-N_b-(ZZZ)_j-N_a-n_q3′
antisense: 3′n_p′-N_a′-(X′X′X′)_k-N_b′-Y′Y′Y′-N_b′-(Z′Z′Z′)_l—N_a′-n_q′5′   (III)

• • [0276] wherein:
  • [0277] j, k, and l are each independently 0 or 1;
  • [0278] p, p′, q, and q′ are each independently 0-6;
  • [0279] each N_a and N_a′ independently represents an oligonucleotide sequence comprising 0-25 modified nucleotides, each sequence comprising at least two differently modified nucleotides;
  • [0280] each N_b and N_b′ independently represents an oligonucleotide sequence comprising 0-10 modified nucleotides;
  • [0281] wherein each n_p′, n_p, n_q′, and n_q, each of which may or may not be present, independently represents an overhang nucleotide; and

[0282] XXX, YYY, ZZZ, X′X′X′, Y′Y′Y′, and Z′Z′Z′ each independently represent one motif of three identical modifications on three consecutive nucleotides.

[0283] In one embodiment, i is 0 and j is 0; or i is 1 and j is 0; or i is 0 and j is 1; or both i and j are 0; or both i and j are 1. In another embodiment, k is 0 and l is 0; or k is 1 and l is 0; k is 0 and l is 1; or both k and l are 0; or both k and l are 1.

[0284] Exemplary combinations of the sense strand and antisense strand forming an iRNA duplex include the formulas below:
5′n_p-N_a-YYY-N_a-n_q3′
3′n_p′-N_a′-Y′Y′Y′-N_a′n_q′5′   (IIIa)
5′n_p-N_a-YYY-N_b-ZZZ-N_a-n_q3′
3′n_p′-N_a′-Y′Y′Y′-N_b′-Z′Z′Z′-N_a′n_q′5′   (IIIb)
5′n_p-N_a-XXX-N_b-YYY-N_a-n_q3′
3′n_p′-N_a′-X′X′X′-N_b′-Y′Y′Y′-N_a′-n_q′5′   (IIIc)
5′n_p-N_a-XXX-N_b-YYY-N_b-ZZZ-N_a-n_q3′
3′n_p′-N_a′-X′X′X′-N_b′-Y′Y′Y′-N_b′-Z′Z′Z′-N_a-n_q′5′   (IIId)

[0285] When the dsRNAi agent is represented by formula (IIIa), each N_a independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0286] When the dsRNAi agent is represented by formula (Mb), each N_b independently represents an oligonucleotide sequence comprising 1-10, 1-7, 1-5, or 1-4 modified nucleotides. Each N_a independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0287] When the dsRNAi agent is represented as formula (IIIc), each N_b, N_b′ independently represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.

[0288] When the dsRNAi agent is represented as formula (IIId), each N_b, N_b′ independently represents an oligonucleotide sequence comprising 0-10, 0-7, 0-10, 0-7, 0-5, 0-4, 0-2, or 0 modified nucleotides. Each N_a, N_a′ independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides. Each of N_a, N_a′, N_b, and N_b′ independently comprises modifications of alternating pattern.

[0289] Each of X, Y, and Z in formulas (III), (IIIa), (IIIb), (IIIc), and (IIId) may be the same or different from each other.

[0290] When the dsRNAi agent is represented by formula (III), (IIIa), (IIIb), (IIIc), and (IIId), at least one of the Y nucleotides may form a base pair with one of the Y′ nucleotides. Alternatively, at least two of the Y nucleotides form base pairs with the corresponding Y′ nucleotides; or all three of the Y nucleotides all form base pairs with the corresponding Y′ nucleotides.

[0291] When the dsRNAi agent is represented by formula (IIIb) or (IIId), at least one of the Z nucleotides may form a base pair with one of the Z′ nucleotides. Alternatively, at least two of the Z nucleotides form base pairs with the corresponding Z′ nucleotides; or all three of the Z nucleotides all form base pairs with the corresponding Z′ nucleotides.

[0292] When the dsRNAi agent is represented as formula (IIIc) or (IIId), at least one of the X nucleotides may form a base pair with one of the X′ nucleotides. Alternatively, at least two of the X nucleotides form base pairs with the corresponding X′ nucleotides; or all three of the X nucleotides all form base pairs with the corresponding X′ nucleotides.

[0293] In certain embodiments, the modification on the Y nucleotide is different than the modification on the Y′ nucleotide, the modification on the Z nucleotide is different than the modification on the Z′ nucleotide, or the modification on the X nucleotide is different than the modification on the X′ nucleotide.

[0294] In certain embodiments, when the dsRNAi agent is represented by formula (IIId), the N_a modifications are 2′-O-methyl or 2′-fluoro modifications. In other embodiments, when the RNAi agent is represented by formula (IIId), the N_a modifications are 2′-O-methyl or 2′-fluoro modifications and n_p′>0 and at least one n_p′ is linked to a neighboring nucleotide a via phosphorothioate linkage. In yet other embodiments, when the RNAi agent is represented by formula (IIId), the N_a modifications are 2′-O-methyl or 2′-fluoro modifications, n_p′>0 and at least one n_p′ is linked to a neighboring nucleotide via phosphorothioate linkage, and the sense strand is conjugated to one or more GalNAc derivatives attached through a bivalent or trivalent branched linker (described below). In other embodiments, when the RNAi agent is represented by formula (IIId), the N_a modifications are 2′-O-methyl or 2′-fluoro modifications, n_p′>0 and at least one n_p′ is linked to a neighboring nucleotide via phosphorothioate linkage, the sense strand comprises at least one phosphorothioate linkage, and the sense strand is conjugated to one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.

[0295] In some embodiments, when the dsRNAi agent is represented by formula (IIIa), the N_a modifications are 2′-O-methyl or 2′-fluoro modifications, n_p′>0 and at least one n_p′ is linked to a neighboring nucleotide via phosphorothioate linkage, the sense strand comprises at least one phosphorothioate linkage, and the sense strand is conjugated to one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.

[0296] In some embodiments, the dsRNAi agent is a multimer containing at least two duplexes represented by formula (III), (IIIa), (Mb), (IIIc), and (IIId), wherein the duplexes are connected by a linker. The linker can be cleavable or non-cleavable. Optionally, the multimer further comprises a ligand. Each of the duplexes can target the same gene or two different genes; or each of the duplexes can target same gene at two different target sites.

[0297] In some embodiments, the dsRNAi agent is a multimer containing three, four, five, six, or more duplexes represented by formula (III), (IIIa), (Mb), (IIIc), and (IIId), wherein the duplexes are connected by a linker. The linker can be cleavable or non-cleavable. Optionally, the multimer further comprises a ligand. Each of the duplexes can target the same gene or two different genes; or each of the duplexes can target same gene at two different target sites.

[0298] In one embodiment, two dsRNAi agents represented by at least one of formulas (III), (IIIa), (Mb), (IIIc), and (IIId) are linked to each other at the 5′ end, and one or both of the 3′ ends, and are optionally conjugated to a ligand. Each of the agents can target the same gene or two different genes; or each of the agents can target same gene at two different target sites.

[0299] In certain embodiments, an RNAi agent of the invention may contain a low number of nucleotides containing a 2′-fluoro modification, e.g., 10 or fewer nucleotides with 2′-fluoro modification. For example, the RNAi agent may contain 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 or 0 nucleotides with a 2′-fluoro modification. In a specific embodiment, the RNAi agent of the invention contains 10 nucleotides with a 2′-fluoro modification, e.g., 4 nucleotides with a 2′-fluoro modification in the sense strand and 6 nucleotides with a 2′-fluoro modification in the antisense strand. In another specific embodiment, the RNAi agent of the invention contains 6 nucleotides with a 2′-fluoro modification, e.g., 4 nucleotides with a 2′-fluoro modification in the sense strand and 2 nucleotides with a 2′-fluoro modification in the antisense strand.

[0300] In other embodiments, an RNAi agent of the invention may contain an ultra low number of nucleotides containing a 2′-fluoro modification, e.g., 2 or fewer nucleotides containing a 2′-fluoro modification. For example, the RNAi agent may contain 2, 1 of 0 nucleotides with a 2′-fluoro modification. In a specific embodiment, the RNAi agent may contain 2 nucleotides with a 2′-fluoro modification, e.g., 0 nucleotides with a 2-fluoro modification in the sense strand and 2 nucleotides with a 2′-fluoro modification in the antisense strand.

[0301] Various publications describe multimeric iRNAs that can be used in the methods of the invention. Such publications include WO2007/091269, U.S. Pat. No. 7,858,769, WO2010/141511, WO2007/117686, WO2009/014887, and WO2011/031520 the entire contents of each of which are hereby incorporated herein by reference.

[0302] As described in more detail below, the iRNA that contains conjugations of one or more carbohydrate moieties to an iRNA may improve one or more properties of the iRNA. In many cases, the carbohydrate moiety will be attached to a modified subunit of the iRNA. For example, the ribose sugar of one or more ribonucleotide subunits of a iRNA can be replaced with another moiety, e.g., a non-carbohydrate (e.g., cyclic) carrier to which is attached a carbohydrate ligand. A ribonucleotide subunit in which the ribose sugar of the subunit has been so replaced is referred to herein as a ribose replacement modification subunit (RRMS). A cyclic carrier may be a carbocyclic ring system, i.e., all ring atoms are carbon atoms, or a heterocyclic ring system, i.e., one or more ring atoms may be a heteroatom, e.g., nitrogen, oxygen, sulfur. The cyclic carrier may be a monocyclic ring system, or may contain two or more rings, e.g. fused rings. The cyclic carrier may be a fully saturated ring system, or it may contain one or more double bonds.

[0303] The ligand may be attached to the polynucleotide via a carrier. The carriers include (i) at least one “backbone attachment point,” such as two “backbone attachment points” and (ii) at least one “tethering attachment point.” A “backbone attachment point” as used herein refers to a functional group, e.g. a hydroxyl group, or generally, a bond available for, and that is suitable for incorporation of the carrier into the backbone, e.g., the phosphate, or modified phosphate, e.g., sulfur containing, backbone, of a ribonucleic acid. A “tethering attachment point” (TAP) in some embodiments refers to a constituent ring atom of the cyclic carrier, e.g., a carbon atom or a heteroatom (distinct from an atom which provides a backbone attachment point), that connects a selected moiety. The moiety can be, e.g., a carbohydrate, e.g. monosaccharide, disaccharide, trisaccharide, tetrasaccharide, oligosaccharide, or polysaccharide. Optionally, the selected moiety is connected by an intervening tether to the cyclic carrier. Thus, the cyclic carrier will often include a functional group, e.g., an amino group, or generally, provide a bond, that is suitable for incorporation or tethering of another chemical entity, e.g., a ligand to the constituent ring.

[0304] The iRNA may be conjugated to a ligand via a carrier, wherein the carrier can be cyclic group or acyclic group. The cyclic group can be selected from pyrrolidinyl, pyrazolinyl, pyrazolidinyl, imidazolinyl, imidazolidinyl, piperidinyl, piperazinyl, [1,3]dioxolane, oxazolidinyl, isoxazolidinyl, morpholinyl, thiazolidinyl, isothiazolidinyl, quinoxalinyl, pyridazinonyl, tetrahydrofuryl, and decalinyl. The acyclic group can be a serinol backbone or diethanolamine backbone.

[0305] In another embodiment of the invention, an iRNA agent comprises a sense strand and an antisense strand, each strand having 14 to 40 nucleotides. The RNAi agent may be represented by formula (L):

[0306]
In formula (L), B1, B2, B3, B1′, B2′, B3′, and B4′ each are independently a nucleotide containing a modification selected from the group consisting of 2′-O-alkyl, 2′-substituted alkoxy, 2′-substituted alkyl, 2′-halo, ENA, and BNA/LNA. In one embodiment, B1, B2, B3, B1′, B2′, B3′, and B4′ each contain 2′-OMe modifications. In one embodiment, B1, B2, B3, B1′, B2′, B3′, and B4′ each contain 2′-OMe or 2′-F modifications. In one embodiment, at least one of B1, B2, B3, B1′, B2′, B3′, and B4′ contain 2′-O—N-methylacetamido (2′-O-NMA) modification.

[0307] C1 is a thermally destabilizing nucleotide placed at a site opposite to the seed region of the antisense strand (i.e., at positions 2-8 of the 5′-end of the antisense strand). For example, C1 is at a position of the sense strand that pairs with a nucleotide at positions 2-8 of the 5′-end of the antisense strand. In one example, C1 is at position 15 from the 5′-end of the sense strand. C1 nucleotide bears the thermally destabilizing modification which can include abasic modification; mismatch with the opposing nucleotide in the duplex; and sugar modification such as 2′-deoxy modification or acyclic nucleotide e.g., unlocked nucleic acids (UNA) or glycerol nucleic acid (GNA). In one embodiment, C1 has thermally destabilizing modification selected from the group consisting of: i) mismatch with the opposing nucleotide in the antisense strand; ii) abasic modification selected from the group consisting of:

[0308]
and iii) sugar modification selected from the group consisting of:

[0309]

• • [0310] wherein B is a modified or unmodified nucleobase, R¹ and R² independently are H, halogen, OR₃, or alkyl; and R₃ is H, alkyl, cycloalkyl, aryl, aralkyl, heteroaryl or sugar. In one embodiment, the thermally destabilizing modification in C1 is a mismatch selected from the group consisting of G:G, G:A, G:U, G:T, A:A, A:C, C:C, C:U, C:T, U:U, T:T, and U:T; and optionally, at least one nucleobase in the mismatch pair is a 2′-deoxy nucleobase. In one example, the thermally destabilizing modification in C1 is GNA or

[0311]

• • [0312] T1, T1′, T2′, and T3′ each independently represent a nucleotide comprising a modification providing the nucleotide a steric bulk that is less or equal to the steric bulk of a 2′-OMe modification. A steric bulk refers to the sum of steric effects of a modification. Methods for determining steric effects of a modification of a nucleotide are known to one skilled in the art. The modification can be at the 2′ position of a ribose sugar of the nucleotide, or a modification to a non-ribose nucleotide, acyclic nucleotide, or the backbone of the nucleotide that is similar or equivalent to the 2′ position of the ribose sugar, and provides the nucleotide a steric bulk that is less than or equal to the steric bulk of a 2′-OMe modification. For example, T1, T1′, T2′, and T3′ are each independently selected from DNA, RNA, LNA, 2′-F, and 2′-F-5′-methyl. In one embodiment, T1 is DNA. In one embodiment, T1′ is DNA, RNA or LNA. In one embodiment, T2′ is DNA or RNA. In one embodiment, T3′ is DNA or RNA.
  • [0313] n¹, n³, and q¹ are independently 4 to 15 nucleotides in length.
  • [0314] n⁵, q³, and q⁷ are independently 1-6 nucleotide(s) in length.
  • [0315] n⁴, q², and q⁶ are independently 1-3 nucleotide(s) in length; alternatively, n⁴ is 0.
  • [0316] q⁵ is independently 0-10 nucleotide(s) in length.
  • [0317] n² and q⁴ are independently 0-3 nucleotide(s) in length.

[0318] Alternatively, n⁴ is 0-3 nucleotide(s) in length.

[0319] In one embodiment, n⁴ can be 0. In one example, n⁴ is 0, and q² and q⁶ are 1. In another example, n⁴ is 0, and q² and q⁶ are 1, with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0320] In one embodiment, n⁴, q², and q⁶ are each 1.

[0321] In one embodiment, n², n⁴, q², q⁴, and q⁶ are each 1.

[0322] In one embodiment, C1 is at position 14-17 of the 5′-end of the sense strand, when the sense strand is 19-22 nucleotides in length, and n⁴ is 1. In one embodiment, C1 is at position 15 of the 5′-end of the sense strand

[0323] In one embodiment, T3′ starts at position 2 from the 5′ end of the antisense strand. In one example, T3′ is at position 2 from the 5′ end of the antisense strand and q⁶ is equal to 1.

[0324] In one embodiment, T1′ starts at position 14 from the 5′ end of the antisense strand. In one example, T1′ is at position 14 from the 5′ end of the antisense strand and q² is equal to 1.

[0325] In an exemplary embodiment, T3′ starts from position 2 from the 5′ end of the antisense strand and T1′ starts from position 14 from the 5′ end of the antisense strand. In one example, T3′ starts from position 2 from the 5′ end of the antisense strand and q⁶ is equal to 1 and T1′ starts from position 14 from the 5′ end of the antisense strand and q² is equal to 1.

[0326] In one embodiment, T1′ and T3′ are separated by 11 nucleotides in length (i.e. not counting the T1′ and T3′ nucleotides).

[0327] In one embodiment, T1′ is at position 14 from the 5′ end of the antisense strand. In one example, T1′ is at position 14 from the 5′ end of the antisense strand and q² is equal to 1, and the modification at the 2′ position or positions in a non-ribose, acyclic or backbone that provide less steric bulk than a 2′-OMe ribose.

[0328] In one embodiment, T3′ is at position 2 from the 5′ end of the antisense strand. In one example, T3′ is at position 2 from the 5′ end of the antisense strand and q⁶ is equal to 1, and the modification at the 2′ position or positions in a non-ribose, acyclic or backbone that provide less than or equal to steric bulk than a 2′-OMe ribose.

[0329] In one embodiment, T1 is at the cleavage site of the sense strand. In one example, T1 is at position 11 from the 5′ end of the sense strand, when the sense strand is 19-22 nucleotides in length, and n² is 1. In an exemplary embodiment, T1 is at the cleavage site of the sense strand at position 11 from the 5′ end of the sense strand, when the sense strand is 19-22 nucleotides in length, and n² is 1, In one embodiment, T2′ starts at position 6 from the 5′ end of the antisense strand. In one example, T2′ is at positions 6-10 from the 5′ end of the antisense strand, and q⁴ is 1.

[0330] In an exemplary embodiment, T1 is at the cleavage site of the sense strand, for instance, at position 11 from the 5′ end of the sense strand, when the sense strand is 19-22 nucleotides in length, and n² is 1; T1′ is at position 14 from the 5′ end of the antisense strand, and q² is equal to 1, and the modification to T1′ is at the 2′ position of a ribose sugar or at positions in a non-ribose, acyclic or backbone that provide less steric bulk than a 2′-OMe ribose; T2′ is at positions 6-10 from the 5′ end of the antisense strand, and q⁴ is 1; and T3′ is at position 2 from the 5′ end of the antisense strand, and q⁶ is equal to 1, and the modification to T3′ is at the 2′ position or at positions in a non-ribose, acyclic or backbone that provide less than or equal to steric bulk than a 2′-OMe ribose.

[0331] In one embodiment, T2′ starts at position 8 from the 5′ end of the antisense strand. In one example, T2′ starts at position 8 from the 5′ end of the antisense strand, and q⁴ is 2.

[0332] In one embodiment, T2′ starts at position 9 from the 5′ end of the antisense strand. In one example, T2′ is at position 9 from the 5′ end of the antisense strand, and q⁴ is 1.

[0333] In one embodiment, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 6, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0334] In one embodiment, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 6, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0335] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0336] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 6, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 7, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 6, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 7, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0337] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 6, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 6, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0338] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 5, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; optionally with at least 2 additional TT at the 3′-end of the antisense strand.

[0339] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 5, T2′ is 2′-F, q⁴ is 1, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; optionally with at least 2 additional TT at the 3′-end of the antisense strand; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0340] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end).

[0341] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0342] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within positions 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand).

[0343] The RNAi agent can comprise a phosphorus-containing group at the 5′-end of the sense strand or antisense strand. The 5′-end phosphorus-containing group can be 5′-end phosphate (5′-P), 5′-end phosphorothioate (5′-PS), 5′-end phosphorodithioate (5′-PS₂), 5′-end vinylphosphonate (5′-VP), 5′-end methylphosphonate (MePhos), or 5′-deoxy-5′-C-malonyl

[0344]
When the 5′-end phosphorus-containing group is 5′-end vinylphosphonate (5′-VP), the 5′-VP can be either 5′-E-VP isomer (i.e., trans-vinylphosphate,

[0345]
5′-Z-VP isomer (i.e., cis-vinylphosphate,

[0346]
or mixtures thereof.

[0347] In one embodiment, the RNAi agent comprises a phosphorus-containing group at the 5′-end of the sense strand. In one embodiment, the RNAi agent comprises a phosphorus-containing group at the 5′-end of the antisense strand.

[0348] In one embodiment, the RNAi agent comprises a 5′-P. In one embodiment, the RNAi agent comprises a 5′-P in the antisense strand.

[0349] In one embodiment, the RNAi agent comprises a 5′-PS. In one embodiment, the RNAi agent comprises a 5′-PS in the antisense strand.

[0350] In one embodiment, the RNAi agent comprises a 5′-VP. In one embodiment, the RNAi agent comprises a 5′-VP in the antisense strand. In one embodiment, the RNAi agent comprises a 5′-E-VP in the antisense strand. In one embodiment, the RNAi agent comprises a 5′-Z-VP in the antisense strand.

[0351] In one embodiment, the RNAi agent comprises a 5′-PS₂. In one embodiment, the RNAi agent comprises a 5′-PS₂ in the antisense strand.

[0352] In one embodiment, the RNAi agent comprises a 5′-PS₂. In one embodiment, the RNAi agent comprises a 5′-deoxy-5′-C-malonyl in the antisense strand.

[0353] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-PS.

[0354] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-P.

[0355] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0356] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q′ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-PS₂.

[0357] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0358] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P.

[0359] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS.

[0360] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0361] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂.

[0362] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0363] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-P.

[0364] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The dsRNA agent also comprises a 5′-PS.

[0365] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-PS₂.

[0366] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1. The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0367] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-P.

[0368] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-PS.

[0369] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0370] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-PS₂.

[0371] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl. In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-P.

[0372] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-PS.

[0373] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0374] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The dsRNAi RNA agent also comprises a 5′-PS₂.

[0375] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0376] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P.

[0377] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS.

[0378] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0379] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂.

[0380] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0381] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-P.

[0382] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-PS.

[0383] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0384] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-PS₂.

[0385] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1. The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0386] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P.

[0387] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS.

[0388] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP. The 5′-VP may be 5′-E-VP, 5′-Z-VP, or combination thereof.

[0389] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂.

[0390] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl.

[0391] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P and a targeting ligand. In one embodiment, the 5′-P is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0392] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS and a targeting ligand. In one embodiment, the 5′-PS is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0393] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP (e.g., a 5′-E-VP, 5′-Z-VP, or combination thereof), and a targeting ligand.

[0394] In one embodiment, the 5′-VP is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0395] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂ and a targeting ligand. In one embodiment, the 5′-PS₂ is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0396] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl and a targeting ligand. In one embodiment, the 5′-deoxy-5′-C-malonyl is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0397] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-P and a targeting ligand. In one embodiment, the 5′-P is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0398] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-PS and a targeting ligand. In one embodiment, the 5′-PS is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0399] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-VP (e.g., a 5′-E-VP, 5′-Z-VP, or combination thereof) and a targeting ligand. In one embodiment, the 5′-VP is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0400] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-PS₂ and a targeting ligand. In one embodiment, the 5′-PS₂ is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0401] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-OMe, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl and a targeting ligand. In one embodiment, the 5′-deoxy-5′-C-malonyl is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0402] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P and a targeting ligand. In one embodiment, the 5′-P is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0403] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS and a targeting ligand. In one embodiment, the 5′-PS is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0404] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP (e.g., a 5′-E-VP, 5′-Z-VP, or combination thereof) and a targeting ligand. In one embodiment, the 5′-VP is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0405] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂ and a targeting ligand. In one embodiment, the 5′-PS₂ is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0406] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, T2′ is 2′-F, q⁴ is 2, B3′ is 2′-OMe or 2′-F, q⁵ is 5, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl and a targeting ligand. In one embodiment, the 5′-deoxy-5′-C-malonyl is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0407] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-P and a targeting ligand. In one embodiment, the 5′-P is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0408] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, BF is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS and a targeting ligand. In one embodiment, the 5′-PS is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0409] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-VP (e.g., a 5′-E-VP, 5′-Z-VP, or combination thereof) and a targeting ligand. In one embodiment, the 5′-VP is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0410] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-PS₂ and a targeting ligand. In one embodiment, the 5′-PS₂ is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0411] In one embodiment, B1 is 2′-OMe or 2′-F, n¹ is 8, T1 is 2′F, n² is 3, B2 is 2′-OMe, n³ is 7, n⁴ is 0, B3 is 2′-OMe, n⁵ is 3, B1′ is 2′-OMe or 2′-F, q¹ is 9, T1′ is 2′-F, q² is 1, B2′ is 2′-OMe or 2′-F, q³ is 4, q⁴ is 0, B3′ is 2′-OMe or 2′-F, q⁵ is 7, T3′ is 2′-F, q⁶ is 1, B4′ is 2′-F, and q⁷ is 1; with two phosphorothioate internucleotide linkage modifications within position 1-5 of the sense strand (counting from the 5′-end of the sense strand), and two phosphorothioate internucleotide linkage modifications at positions 1 and 2 and two phosphorothioate internucleotide linkage modifications within positions 18-23 of the antisense strand (counting from the 5′-end of the antisense strand). The RNAi agent also comprises a 5′-deoxy-5′-C-malonyl and a targeting ligand. In one embodiment, the 5′-deoxy-5′-C-malonyl is at the 5′-end of the antisense strand, and the targeting ligand is at the 3′-end of the sense strand.

[0412] In a particular embodiment, an RNAi agent of the present invention comprises:

• • [0413] (a) a sense strand having:
    • [0414] (i) a length of 21 nucleotides;
    • [0415] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker; and
    • [0416] (iii) 2′-F modifications at positions 1, 3, 5, 7, 9 to 11, 13, 17, 19, and 21, and 2′-OMe modifications at positions 2, 4, 6, 8, 12, 14 to 16, 18, and 20 (counting from the 5′ end);
  • [0417] and
  • [0418] (b) an antisense strand having:
    • [0419] (i) a length of 23 nucleotides;
    • [0420] (ii) 2′-OMe modifications at positions 1, 3, 5, 9, 11 to 13, 15, 17, 19, 21, and 23, and 2′F modifications at positions 2, 4, 6 to 8, 10, 14, 16, 18, 20, and 22 (counting from the 5′ end); and
    • [0421] (iii) phosphorothioate internucleotide linkages between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
  • [0422] wherein the dsRNA agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0423] In another particular embodiment, an RNAi agent of the present invention comprises:

• • [0424] (a) a sense strand having:
    • [0425] (i) a length of 21 nucleotides;
    • [0426] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0427] (iii) 2′-F modifications at positions 1, 3, 5, 7, 9 to 11, 13, 15, 17, 19, and 21, and 2′-OMe modifications at positions 2, 4, 6, 8, 12, 14, 16, 18, and 20 (counting from the 5′ end); and
    • [0428] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0429] and
  • [0430] (b) an antisense strand having:
    • [0431] (i) a length of 23 nucleotides;
    • [0432] (ii) 2′-OMe modifications at positions 1, 3, 5, 7, 9, 11 to 13, 15, 17, 19, and 21 to 23, and 2′F modifications at positions 2, 4, 6, 8, 10, 14, 16, 18, and 20 (counting from the 5′ end); and
    • [0433] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0434] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0435] (a) a sense strand having:
    • [0436] (i) a length of 21 nucleotides;
    • [0437] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0438] (iii) 2′-OMe modifications at positions 1 to 6, 8, 10, and 12 to 21, 2′-F modifications at positions 7, and 9, and a deoxy-nucleotide (e.g. dT) at position 11 (counting from the 5′ end); and
    • [0439] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0440] and
  • [0441] (b) an antisense strand having:
    • [0442] (i) a length of 23 nucleotides;
    • [0443] (ii) 2′-OMe modifications at positions 1, 3, 7, 9, 11, 13, 15, 17, and 19 to 23, and 2′-F modifications at positions 2, 4 to 6, 8, 10, 12, 14, 16, and 18 (counting from the 5′ end); and
    • [0444] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0445] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0446] (a) a sense strand having:
    • [0447] (i) a length of 21 nucleotides;
    • [0448] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0449] (iii) 2′-OMe modifications at positions 1 to 6, 8, 10, 12, 14, and 16 to 21, and 2′-F modifications at positions 7, 9, 11, 13, and 15; and
    • [0450] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0451] and
  • [0452] (b) an antisense strand having:
    • [0453] (i) a length of 23 nucleotides;
    • [0454] (ii) 2′-OMe modifications at positions 1, 5, 7, 9, 11, 13, 15, 17, 19, and 21 to 23, and 2′-F modifications at positions 2 to 4, 6, 8, 10, 12, 14, 16, 18, and 20 (counting from the 5′ end); and
    • [0455] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0456] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0457] (a) a sense strand having:
    • [0458] (i) a length of 21 nucleotides;
    • [0459] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0460] (iii) 2′-OMe modifications at positions 1 to 9, and 12 to 21, and 2′-F modifications at positions 10, and 11; and
    • [0461] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0462] and
  • [0463] (b) an antisense strand having:
    • [0464] (i) a length of 23 nucleotides;
    • [0465] (ii) 2′-OMe modifications at positions 1, 3, 5, 7, 9, 11 to 13, 15, 17, 19, and 21 to 23, and 2′-F modifications at positions 2, 4, 6, 8, 10, 14, 16, 18, and 20 (counting from the 5′ end); and
    • [0466] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0467] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0468] (a) a sense strand having:
    • [0469] (i) a length of 21 nucleotides;
    • [0470] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0471] (iii) 2′-F modifications at positions 1, 3, 5, 7, 9 to 11, and 13, and 2′-OMe modifications at positions 2, 4, 6, 8, 12, and 14 to 21; and
    • [0472] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0473] and
  • [0474] (b) an antisense strand having:
    • [0475] (i) a length of 23 nucleotides;
    • [0476] (ii) 2′-OMe modifications at positions 1, 3, 5 to 7, 9, 11 to 13, 15, 17 to 19, and 21 to 23, and 2′-F modifications at positions 2, 4, 8, 10, 14, 16, and 20 (counting from the 5′ end); and
    • [0477] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0478] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0479] (a) a sense strand having:
    • [0480] (i) a length of 21 nucleotides;
    • [0481] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0482] (iii) 2′-OMe modifications at positions 1, 2, 4, 6, 8, 12, 14, 15, 17, and 19 to 21, and 2′-F modifications at positions 3, 5, 7, 9 to 11, 13, 16, and 18; and
    • [0483] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0484] and
  • [0485] (b) an antisense strand having:
    • [0486] (i) a length of 25 nucleotides;
    • [0487] (ii) 2′-OMe modifications at positions 1, 4, 6, 7, 9, 11 to 13, 15, 17, and 19 to 23, 2′-F modifications at positions 2, 3, 5, 8, 10, 14, 16, and 18, and desoxy-nucleotides (e.g. dT) at positions 24 and 25 (counting from the 5′ end); and
    • [0488] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a four nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0489] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0490] (a) a sense strand having:
    • [0491] (i) a length of 21 nucleotides;
    • [0492] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0493] (iii) 2′-OMe modifications at positions 1 to 6, 8, and 12 to 21, and 2′-F modifications at positions 7, and 9 to 11; and
    • [0494] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0495] and
  • [0496] (b) an antisense strand having:
    • [0497] (i) a length of 23 nucleotides;
    • [0498] (ii) 2′-OMe modifications at positions 1, 3 to 5, 7, 8, 10 to 13, 15, and 17 to 23, and 2′-F modifications at positions 2, 6, 9, 14, and 16 (counting from the 5′ end); and
    • [0499] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0500] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0501] (a) a sense strand having:
    • [0502] (i) a length of 21 nucleotides;
    • [0503] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0504] (iii) 2′-OMe modifications at positions 1 to 6, 8, and 12 to 21, and 2′-F modifications at positions 7, and 9 to 11; and
    • [0505] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0506] and
  • [0507] (b) an antisense strand having:
    • [0508] (i) a length of 23 nucleotides;
    • [0509] (ii) 2′-OMe modifications at positions 1, 3 to 5, 7, 10 to 13, 15, and 17 to 23, and 2′-F modifications at positions 2, 6, 8, 9, 14, and 16 (counting from the 5′ end); and
    • [0510] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 21 and 22, and between nucleotide positions 22 and 23 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0511] In another particular embodiment, a RNAi agent of the present invention comprises:

• • [0512] (a) a sense strand having:
    • [0513] (i) a length of 19 nucleotides;
    • [0514] (ii) an ASGPR ligand attached to the 3′-end, wherein said ASGPR ligand comprises three GalNAc derivatives attached through a trivalent branched linker;
    • [0515] (iii) 2′-OMe modifications at positions 1 to 4, 6, and 10 to 19, and 2′-F modifications at positions 5, and 7 to 9; and
    • [0516] (iv) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, and between nucleotide positions 2 and 3 (counting from the 5′ end);
  • [0517] and
  • [0518] (b) an antisense strand having:
    • [0519] (i) a length of 21 nucleotides;
    • [0520] (ii) 2′-OMe modifications at positions 1, 3 to 5, 7, 10 to 13, 15, and 17 to 21, and 2′-F modifications at positions 2, 6, 8, 9, 14, and 16 (counting from the 5′ end); and
    • [0521] (iii) phosphorothioate internucleotide linkages between nucleotide positions 1 and 2, between nucleotide positions 2 and 3, between nucleotide positions 19 and 20, and between nucleotide positions 20 and 21 (counting from the 5′ end);
      wherein the RNAi agents have a two nucleotide overhang at the 3′-end of the antisense strand, and a blunt end at the 5′-end of the antisense strand.

[0522] In certain embodiments, the iRNA for use in the methods of the invention is an agent selected from agents listed in any one of Tables 2-7. These agents may further comprise a ligand.

[0523] Another modification of the RNA of an iRNA of the invention involves chemically linking to the iRNA one or more ligands, moieties or conjugates that enhance the activity, cellular distribution, or cellular uptake of the iRNA e.g., into a cell. Such moieties include but are not limited to lipid moieties such as a cholesterol moiety (Letsinger et al., Proc. Natl. Acid. Sci. USA, 1989, 86: 6553-6556). In other embodiments, the ligand is cholic acid (Manoharan et al., Biorg. Med. Chem. Let., 1994, 4:1053-1060), a thioether, e.g., beryl-S-tritylthiol (Manoharan et al., Ann. N.Y. Acad. Sci., 1992, 660:306-309; Manoharan et al., Biorg. Med. Chem. Let., 1993, 3:2765-2770), a thiocholesterol (Oberhauser et al., Nucl. Acids Res., 1992, 20:533-538), an aliphatic chain, e.g., dodecandiol or undecyl residues (Saison-Behmoaras et al., EMBO J, 1991, 10:1111-1118; Kabanov et al., FEBS Lett., 1990, 259:327-330; Svinarchuk et al., Biochimie, 1993, 75:49-54), a phospholipid, e.g., di-hexadecyl-rac-glycerol or triethyl-ammonium 1,2-di-O-hexadecyl-rac-glycero-3-phosphonate (Manoharan et al., Tetrahedron Lett., 1995, 36:3651-3654; Shea et al., Nucl. Acids Res., 1990, 18:3777-3783), a polyamine or a polyethylene glycol chain (Manoharan et al., Nucleosides & Nucleotides, 1995, 14:969-973), or adamantane acetic acid (Manoharan et al., Tetrahedron Lett., 1995, 36:3651-3654), a palmityl moiety (Mishra et al., Biochim. Biophys. Acta, 1995, 1264:229-237), or an octadecylamine or hexylamino-carbonyloxycholesterol moiety (Crooke et al., J. Pharmacol. Exp. Ther., 1996, 277:923-937).

[0524] In certain embodiments, a ligand alters the distribution, targeting, or lifetime of an iRNA agent into which it is incorporated. In certain embodiments a ligand provides an enhanced affinity for a selected target, e.g., molecule, cell or cell type, compartment, e.g., a cellular or organ compartment, tissue, organ or region of the body, as, e.g., compared to a species absent such a ligand. Typical ligands will not take part in duplex pairing in a duplexed nucleic acid.

[0525] Ligands can include a naturally occurring substance, such as a protein (e.g., human serum albumin (HSA), low-density lipoprotein (LDL), or globulin); carbohydrate (e.g., a dextran, pullulan, chitin, chitosan, inulin, cyclodextrin, N-acetylglucosamine, N-acetylgalactosamine, or hyaluronic acid); or a lipid. The ligand can also be a recombinant or synthetic molecule, such as a synthetic polymer, e.g., a synthetic polyamino acid. Examples of polyamino acids include polyamino acid is a polylysine (PLL), poly L-aspartic acid, poly L-glutamic acid, styrene-maleic acid anhydride copolymer, poly(L-lactide-co-glycolied) copolymer, divinyl ether-maleic anhydride copolymer, N-(2-hydroxypropyl)methacrylamide copolymer (HMPA), polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyurethane, poly(2-ethylacryllic acid), N-isopropylacrylamide polymers, or polyphosphazine. Example of polyamines include: polyethylenimine, polylysine (PLL), spermine, spermidine, polyamine, pseudopeptide-polyamine, peptidomimetic polyamine, dendrimer polyamine, arginine, amidine, protamine, cationic lipid, cationic porphyrin, quaternary salt of a polyamine, or an alpha helical peptide.

[0526] Ligands can also include targeting groups, e.g., a cell or tissue targeting agent, e.g., a lectin, glycoprotein, lipid or protein, e.g., an antibody, that binds to a specified cell type such as a kidney cell. A targeting group can be a thyrotropin, melanotropin, lectin, glycoprotein, surfactant protein A, Mucin carbohydrate, multivalent lactose, multivalent galactose, N-acetyl-galactosamine, N-acetyl-glucosamine multivalent mannose, multivalent fucose, glycosylated polyaminoacids, multivalent galactose, transferrin, bisphosphonate, polyglutamate, polyaspartate, a lipid, cholesterol, a steroid, bile acid, folate, vitamin B12, vitamin A, biotin, or an RGD peptide or RGD peptide mimetic. In certain embodiments, the ligand is a multivalent galactose, e.g., an N-acetyl-galactosamine.

[0527] Other examples of ligands include dyes, intercalating agents (e.g. acridines), cross-linkers (e.g. psoralene, mitomycin C), porphyrins (TPPC4, texaphyrin, Sapphyrin), polycyclic aromatic hydrocarbons (e.g., phenazine, dihydrophenazine), artificial endonucleases (e.g. EDTA), lipophilic molecules, e.g., cholesterol, cholic acid, adamantane acetic acid, 1-pyrene butyric acid, dihydrotestosterone, 1,3-Bis-O(hexadecyl)glycerol, geranyloxyhexyl group, hexadecylglycerol, borneol, menthol, 1,3-propanediol, heptadecyl group, palmitic acid, myristic acid, O3-(oleoyl)lithocholic acid, O3-(oleoyl)cholenic acid, dimethoxytrityl, or phenoxazine) and peptide conjugates (e.g., antennapedia peptide, Tat peptide), alkylating agents, phosphate, amino, mercapto, PEG (e.g., PEG-40K), mPEG, [mPEG]₂, polyamino, alkyl, substituted alkyl, radiolabeled markers, enzymes, haptens (e.g. biotin), transport/absorption facilitators (e.g., aspirin, vitamin E, folic acid), synthetic ribonucleases (e.g., imidazole, bisimidazole, histamine, imidazole clusters, acridine-imidazole conjugates, Eu3+ complexes of tetraazamacrocycles), dinitrophenyl, HRP, or AP.

[0528] Ligands can be proteins, e.g., glycoproteins, or peptides, e.g., molecules having a specific affinity for a co-ligand, or antibodies e.g., an antibody, that binds to a specified cell type such as a hepatic cell. Ligands can also include hormones and hormone receptors. They can also include non-peptidic species, such as lipids, lectins, carbohydrates, vitamins, cofactors, multivalent lactose, multivalent galactose, N-acetyl-galactosamine, N-acetyl-glucosamine multivalent mannose, or multivalent fucose. The ligand can be, for example, a lipopolysaccharide, an activator of p38 MAP kinase, or an activator of NF-κB.

[0529] The ligand can be a substance, e.g., a drug, which can increase the uptake of the iRNA agent into the cell, for example, by disrupting the cell's cytoskeleton, e.g., by disrupting the cell's microtubules, microfilaments, or intermediate filaments. The drug can be, for example, taxol, vincristine, vinblastine, cytochalasin, nocodazole, japlakinolide, latrunculin A, phalloidin, swinholide A, indanocine, or myoservin.

[0530] In some embodiments, a ligand attached to an iRNA as described herein acts as a pharmacokinetic modulator (PK modulator). PK modulators include lipophiles, bile acids, steroids, phospholipid analogues, peptides, protein binding agents, polyethylene glycol (PEG), vitamins, etc. Exemplary PK modulators include, but are not limited to, cholesterol, fatty acids, cholic acid, lithocholic acid, dialkylglycerides, diacylglyceride, phospholipids, sphingolipids, naproxen, ibuprofen, vitamin E, biotin. Oligonucleotides that comprise a number of phosphorothioate linkages are also known to bind to serum protein, thus short oligonucleotides, e.g., oligonucleotides of about 5 bases, 10 bases, 15 bases, or bases, comprising multiple of phosphorothioate linkages in the backbone are also amenable to the present invention as ligands (e.g. as PK modulating ligands). In addition, aptamers that bind serum components (e.g. serum proteins) are also suitable for use as PK modulating ligands in the embodiments described herein.

[0531] Ligand-conjugated iRNAs of the invention may be synthesized by the use of an oligonucleotide that bears a pendant reactive functionality, such as that derived from the attachment of a linking molecule onto the oligonucleotide (described below). This reactive oligonucleotide may be reacted directly with commercially-available ligands, ligands that are synthesized bearing any of a variety of protecting groups, or ligands that have a linking moiety attached thereto.

[0532] The oligonucleotides used in the conjugates of the present invention may be conveniently and routinely made through the well-known technique of solid-phase synthesis. Equipment for such synthesis is sold by several vendors including, for example, Applied Biosystems® (Foster City, Calif.). Any other methods for such synthesis known in the art may additionally or alternatively be employed. It is also known to use similar techniques to prepare other oligonucleotides, such as the phosphorothioates and alkylated derivatives.

[0533] In the ligand-conjugated iRNAs and ligand-molecule bearing sequence-specific linked nucleosides of the present invention, the oligonucleotides and oligonucleosides may be assembled on a suitable DNA synthesizer utilizing standard nucleotide or nucleoside precursors, or nucleotide or nucleoside conjugate precursors that already bear the linking moiety, ligand-nucleotide or nucleoside-conjugate precursors that already bear the ligand molecule, or non-nucleoside ligand-bearing building blocks.

[0534] When using nucleotide-conjugate precursors that already bear a linking moiety, the synthesis of the sequence-specific linked nucleosides is typically completed, and the ligand molecule is then reacted with the linking moiety to form the ligand-conjugated oligonucleotide. In some embodiments, the oligonucleotides or linked nucleosides of the present invention are synthesized by an automated synthesizer using phosphoramidites derived from ligand-nucleoside conjugates in addition to the standard phosphoramidites and non-standard phosphoramidites that are commercially available and routinely used in oligonucleotide synthesis.

A. Lipid Conjugates

[0535] In certain embodiments, the ligand or conjugate is a lipid or lipid-based molecule. Such a lipid or lipid-based molecule may bind a serum protein, e.g., human serum albumin (HSA). An HSA binding ligand allows for distribution of the conjugate to a target tissue, e.g., a non-kidney target tissue of the body. For example, the target tissue can be the liver, including parenchymal cells of the liver. Other molecules that can bind HSA can also be used as ligands. For example, naproxen or aspirin can be used. A lipid or lipid-based ligand can (a) increase resistance to degradation of the conjugate, (b) increase targeting or transport into a target cell or cell membrane, or (c) can be used to adjust binding to a serum protein, e.g., HSA.

[0536] A lipid based ligand can be used to inhibit, e.g., control the binding of the conjugate to a target tissue. For example, a lipid or lipid-based ligand that binds to HSA more strongly will be less likely to be targeted to the kidney and therefore less likely to be cleared from the body. A lipid or lipid-based ligand that binds to HSA less strongly can be used to target the conjugate to the kidney.

[0537] In certain embodiments, the lipid based ligand binds HSA. It may bind HSA with a sufficient affinity such that the conjugate will be distributed to a non-kidney tissue. However, the affinity is typically not so strong that the HSA-ligand binding cannot be reversed.

[0538] In other embodiments, the lipid based ligand binds HSA weakly or not at all, such that the conjugate may be distributed to the kidney. Other moieties that target to kidney cells can also be used in place of, or in addition to, the lipid based ligand.

[0539] In another aspect, the ligand is a moiety, e.g., a vitamin, which is taken up by a target cell, e.g., a proliferating cell. These are particularly useful for treating disorders characterized by unwanted cell proliferation, e.g., of the malignant or non-malignant type, e.g., cancer cells. Exemplary vitamins include vitamin A, E, and K. Other exemplary vitamins include are B vitamin, e.g., folic acid, B12, riboflavin, biotin, pyridoxal or other vitamins or nutrients taken up by target cells such as liver cells. Also included are HSA and low density lipoprotein (LDL).

B. Cell Permeation Agents

[0540] In another aspect, the ligand is a cell-permeation agent, such as a helical cell-permeation agent. In certain embodiments, the agent is amphipathic. An exemplary agent is a peptide such as tat or antennopedia. If the agent is a peptide, it can be modified, including a peptidylmimetic, invertomers, non-peptide or pseudo-peptide linkages, and use of D-amino acids. The helical agent is typically an alpha-helical agent and can have a lipophilic and a lipophobic phase.

[0541] The ligand can be a peptide or peptidomimetic. A peptidomimetic (also referred to herein as an oligopeptidomimetic) is a molecule capable of folding into a defined three-dimensional structure similar to a natural peptide. The attachment of peptide and peptidomimetics to iRNA agents can affect pharmacokinetic distribution of the iRNA, such as by enhancing cellular recognition and absorption. The peptide or peptidomimetic moiety can be about 5-50 amino acids long, e.g., about 5, 10, 15, 20, 25, 30, 35, 40, 45, or 50 amino acids long.

[0542] A peptide or peptidomimetic can be, for example, a cell permeation peptide, cationic peptide, amphipathic peptide, or hydrophobic peptide (e.g., consisting primarily of Tyr, Trp, or Phe). The peptide moiety can be a dendrimer peptide, constrained peptide or crosslinked peptide. In another alternative, the peptide moiety can include a hydrophobic membrane translocation sequence (MTS). An exemplary hydrophobic MTS-containing peptide is RFGF having the amino acid sequence AAVALLPAVLLALLAP (SEQ ID NO: 19). An RFGF analogue (e.g., amino acid sequence AALLPVLLAAP (SEQ ID NO: 20) containing a hydrophobic MTS can also be a targeting moiety. The peptide moiety can be a “delivery” peptide, which can carry large polar molecules including peptides, oligonucleotides, and protein across cell membranes. For example, sequences from the HIV Tat protein (GRKKRRQRRRPPQ (SEQ ID NO: 21) and the Drosophila Antennapedia protein (RQIKIWFQNRRMKWKK (SEQ ID NO: 22) have been found to be capable of functioning as delivery peptides. A peptide or peptidomimetic can be encoded by a random sequence of DNA, such as a peptide identified from a phage-display library, or one-bead-one-compound (OBOC) combinatorial library (Lam et al., Nature, 354:82-84, 1991). Examples of a peptide or peptidomimetic tethered to a dsRNA agent via an incorporated monomer unit for cell targeting purposes is an arginine-glycine-aspartic acid (RGD)-peptide, or RGD mimic A peptide moiety can range in length from about 5 amino acids to about 40 amino acids. The peptide moieties can have a structural modification, such as to increase stability or direct conformational properties. Any of the structural modifications described below can be utilized.

[0543] An RGD peptide for use in the compositions and methods of the invention may be linear or cyclic, and may be modified, e.g., glycosylated or methylated, to facilitate targeting to a specific tissue(s). RGD-containing peptides and peptidomimetics may include D-amino acids, as well as synthetic RGD mimics. In addition to RGD, one can use other moieties that target the integrin ligand. Certain conjugates of this ligand target PECAM-1 or VEGF.

[0544] A “cell permeation peptide” is capable of permeating a cell, e.g., a microbial cell, such as a bacterial or fungal cell, or a mammalian cell, such as a human cell. A microbial cell-permeating peptide can be, for example, an α-helical linear peptide (e.g., LL-37 or Ceropin P1), a disulfide bond-containing peptide (e.g., α-defensin, β-defensin or bactenecin), or a peptide containing only one or two dominating amino acids (e.g., PR-39 or indolicidin). A cell permeation peptide can also include a nuclear localization signal (NLS). For example, a cell permeation peptide can be a bipartite amphipathic peptide, such as MPG, which is derived from the fusion peptide domain of HIV-1 gp41 and the NLS of SV40 large T antigen (Simeoni et al., Nucl. Acids Res. 31:2717-2724, 2003).

C. Carbohydrate Conjugates

[0545] In some embodiments of the compositions and methods of the invention, an iRNA further comprises a carbohydrate. The carbohydrate conjugated iRNA is advantageous for the in vivo delivery of nucleic acids, as well as compositions suitable for in vivo therapeutic use, as described herein. As used herein, “carbohydrate” refers to a compound which is either a carbohydrate per se made up of one or more monosaccharide units having at least 6 carbon atoms (which can be linear, branched or cyclic) with an oxygen, nitrogen or sulfur atom bonded to each carbon atom; or a compound having as a part thereof a carbohydrate moiety made up of one or more monosaccharide units each having at least six carbon atoms (which can be linear, branched or cyclic), with an oxygen, nitrogen or sulfur atom bonded to each carbon atom. Representative carbohydrates include the sugars (mono-, di-, tri-, and oligosaccharides containing from about 4, 5, 6, 7, 8, or 9 monosaccharide units), and polysaccharides such as starches, glycogen, cellulose and polysaccharide gums. Specific monosaccharides include C5 and above (e.g., C5, C6, C7, or C8) sugars; di- and trisaccharides include sugars having two or three monosaccharide units (e.g., C5, C6, C7, or C8).

[0546] In certain embodiments, a carbohydrate conjugate for use in the compositions and methods of the invention is a monosaccharide.

[0547] In one embodiment, a carbohydrate conjugate for use in the compositions and methods of the invention is selected from the group consisting of:

[0548]

[0549] In another embodiment, a carbohydrate conjugate for use in the compositions and methods of the invention is a monosaccharide. In one embodiment, the monosaccharide is an N-acetylgalactosamine, such as

[0550]

[0551] Another representative carbohydrate conjugate for use in the embodiments described herein includes, but is not limited to,

[0552]
when one of X or Y is an oligonucleotide, the other is a hydrogen.

[0553] In certain embodiments of the invention, the GalNAc or GalNAc derivative is attached to an iRNA agent of the invention via a monovalent linker. In some embodiments, the GalNAc or GalNAc derivative is attached to an iRNA agent of the invention via a bivalent linker. In yet other embodiments of the invention, the GalNAc or GalNAc derivative is attached to an iRNA agent of the invention via a trivalent linker.

[0554] In one embodiment, the double stranded RNAi agents of the invention comprise one or more GalNAc or GalNAc derivative attached to the iRNA agent. The GalNAc may be attached to any nucleotide via a linker on the sense strand or antisense strand. The GalNac may be attached to the 5′-end of the sense strand, the 3′ end of the sense strand, the 5′-end of the antisense strand, or the 3′-end of the antisense strand. In one embodiment, the GalNAc is attached to the 3′ end of the sense strand, e.g., via a trivalent linker.

[0555] In other embodiments, the double stranded RNAi agents of the invention comprise a plurality (e.g., 2, 3, 4, 5, or 6) GalNAc or GalNAc derivatives, each independently attached to a plurality of nucleotides of the double stranded RNAi agent through a plurality of linkers, e.g., monovalent linkers.

[0556] In some embodiments, for example, when the two strands of an iRNA agent of the invention is part of one larger molecule connected by an uninterrupted chain of nucleotides between the 3′-end of one strand and the 5′-end of the respective other strand forming a hairpin loop comprising, a plurality of unpaired nucleotides, each unpaired nucleotide within the hairpin loop may independently comprise a GalNAc or GalNAc derivative attached via a monovalent linker.

[0557] In some embodiments, the carbohydrate conjugate further comprises one or more additional ligands as described above, such as, but not limited to, a PK modulator or a cell permeation peptide.

[0558] Additional carbohydrate conjugates and linkers suitable for use in the present invention include those described in PCT Publication Nos. WO 2014/179620 and WO 2014/179627, the entire contents of each of which are incorporated herein by reference.

D. Linkers

[0559] In some embodiments, the conjugate or ligand described herein can be attached to an iRNA oligonucleotide with various linkers that can be cleavable or non-cleavable.

[0560] The term “linker” or “linking group” means an organic moiety that connects two parts of a compound, e.g., covalently attaches two parts of a compound. Linkers typically comprise a direct bond or an atom such as oxygen or sulfur, a unit such as NRB, C(O), C(O)NH, SO, SO₂, SO₂NH or a chain of atoms, such as, but not limited to, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, arylalkyl, arylalkenyl, arylalkynyl, heteroarylalkyl, heteroarylalkenyl, heteroarylalkynyl, heterocyclylalkyl, heterocyclylalkenyl, heterocyclylalkynyl, aryl, heteroaryl, heterocyclyl, cycloalkyl, cycloalkenyl, alkylarylalkyl, alkylarylalkenyl, alkylarylalkynyl, alkenylarylalkyl, alkenylarylalkenyl, alkenylarylalkynyl, alkynylarylalkyl, alkynylarylalkenyl, alkynylarylalkynyl, alkylheteroarylalkyl, alkylheteroarylalkenyl, alkylheteroarylalkynyl, alkenylheteroarylalkyl, alkenylheteroarylalkenyl, alkenylheteroarylalkynyl, alkynylheteroarylalkyl, alkynylheteroarylalkenyl, alkynylheteroarylalkynyl, alkylheterocyclylalkyl, alkylheterocyclylalkenyl, alkylhererocyclylalkynyl, alkenylheterocyclylalkyl, alkenylheterocyclylalkenyl, alkenylheterocyclylalkynyl, alkynylheterocyclylalkyl, alkynylheterocyclylalkenyl, alkynylheterocyclylalkynyl, alkylaryl, alkenylaryl, alkynylaryl, alkylheteroaryl, alkenylheteroaryl, alkynylhereroaryl, which one or more methylenes can be interrupted or terminated by O, S, S(O), SO₂, N(R8), C(O), substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, or substituted or unsubstituted heterocyclic; where R8 is hydrogen, acyl, aliphatic, or substituted aliphatic. In one embodiment, the linker is about 1-24 atoms, 2-24, 3-24, 4-24, 5-24, 6-24, 6-18, 7-18, 8-18, 7-17, 8-17, 6-16, 7-17, or 8-16 atoms.

[0561] A cleavable linking group is one which is sufficiently stable outside the cell, but which upon entry into a target cell is cleaved to release the two parts the linker is holding together. In a certain embodiment, the cleavable linking group is cleaved at least about 10 times, 20, times, 30 times, 40 times, 50 times, 60 times, 70 times, 80 times, 90 times, or more, or at least 100 times faster in a target cell or under a first reference condition (which can, e.g., be selected to mimic or represent intracellular conditions) than in the blood of a subject, or under a second reference condition (which can, e.g., be selected to mimic or represent conditions found in the blood or serum).

[0562] Cleavable linking groups are susceptible to cleavage agents, e.g., pH, redox potential, or the presence of degradative molecules. Generally, cleavage agents are more prevalent or found at higher levels or activities inside cells than in serum or blood. Examples of such degradative agents include: redox agents which are selected for particular substrates or which have no substrate specificity, including, e.g., oxidative or reductive enzymes or reductive agents such as mercaptans, present in cells, that can degrade a redox cleavable linking group by reduction; esterases; endosomes or agents that can create an acidic environment, e.g., those that result in a pH of five or lower; enzymes that can hydrolyze or degrade an acid cleavable linking group by acting as a general acid, peptidases (which can be substrate specific), and phosphatases.

[0563] A cleavable linkage group, such as a disulfide bond can be susceptible to pH. The pH of human serum is 7.4, while the average intracellular pH is slightly lower, ranging from about 7.1-7.3. Endosomes have a more acidic pH, in the range of 5.5-6.0, and lysosomes have an even more acidic pH at around 5.0. Some linkers will have a cleavable linking group that is cleaved at a selected pH, thereby releasing a cationic lipid from the ligand inside the cell, or into the desired compartment of the cell.

[0564] A linker can include a cleavable linking group that is cleavable by a particular enzyme. The type of cleavable linking group incorporated into a linker can depend on the cell to be targeted. For example, a liver-targeting ligand can be linked to a cationic lipid through a linker that includes an ester group. Liver cells are rich in esterases, and therefore the linker will be cleaved more efficiently in liver cells than in cell types that are not esterase-rich. Other cell-types rich in esterases include cells of the lung, renal cortex, and testis.

[0565] Linkers that contain peptide bonds can be used when targeting cell types rich in peptidases, such as liver cells and synoviocytes.

[0566] In general, the suitability of a candidate cleavable linking group can be evaluated by testing the ability of a degradative agent (or condition) to cleave the candidate linking group. It will also be desirable to also test the candidate cleavable linking group for the ability to resist cleavage in the blood or when in contact with other non-target tissue. Thus, one can determine the relative susceptibility to cleavage between a first and a second condition, where the first is selected to be indicative of cleavage in a target cell and the second is selected to be indicative of cleavage in other tissues or biological fluids, e.g., blood or serum. The evaluations can be carried out in cell free systems, in cells, in cell culture, in organ or tissue culture, or in whole animals. It can be useful to make initial evaluations in cell-free or culture conditions and to confirm by further evaluations in whole animals. In certain embodiments, useful candidate compounds are cleaved at least about 2, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 times faster in the cell (or under in vitro conditions selected to mimic intracellular conditions) as compared to blood or serum (or under in vitro conditions selected to mimic extracellular conditions).

i. Redox Cleavable Linking Groups

[0567] In certain embodiments, a cleavable linking group is a redox cleavable linking group that is cleaved upon reduction or oxidation. An example of reductively cleavable linking group is a disulphide linking group (—S—S—). To determine if a candidate cleavable linking group is a suitable “reductively cleavable linking group,” or for example is suitable for use with a particular iRNA moiety and particular targeting agent one can look to methods described herein. For example, a candidate can be evaluated by incubation with dithiothreitol (DTT), or other reducing agent using reagents know in the art, which mimic the rate of cleavage which would be observed in a cell, e.g., a target cell. The candidates can also be evaluated under conditions which are selected to mimic blood or serum conditions. In one, candidate compounds are cleaved by at most about 10% in the blood. In other embodiments, useful candidate compounds are degraded at least about 2, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90, or about 100 times faster in the cell (or under in vitro conditions selected to mimic intracellular conditions) as compared to blood (or under in vitro conditions selected to mimic extracellular conditions). The rate of cleavage of candidate compounds can be determined using standard enzyme kinetics assays under conditions chosen to mimic intracellular media and compared to conditions chosen to mimic extracellular media.

ii. Phosphate-Based Cleavable Linking Groups

[0568] In other embodiments, a cleavable linker comprises a phosphate-based cleavable linking group. A phosphate-based cleavable linking group is cleaved by agents that degrade or hydrolyze the phosphate group. An example of an agent that cleaves phosphate groups in cells are enzymes such as phosphatases in cells. Examples of phosphate-based linking groups are —O—P(O)(ORk)-O—, —O—P(S)(ORk)-O—, —O—P(S)(SRk)-O—, —S—P(O)(ORk)-O—, —O—P(O)(ORk)-S—, —S—P(O)(ORk)-S—, —O—P(S)(ORk)-S—, —S—P(S)(ORk)-O—, —O—P(O)(Rk)-O—, —O—P(S)(Rk)-O—, —S—P(O)(Rk)-O—, —S—P(S)(Rk)-O—, —S—P(O)(Rk)-S—, —O—P(S)(Rk)-S. Additional embodiments include —O—P(O)(OH)—O—, —O—P(S)(OH)—O—, —O—P(S)(SH)—O—, —S—P(O)(OH)—O—, —O—P(O)(OH)—S—, —S—P(O)(OH)—S—, —O—P(S)(OH)—S—, —S—P(S)(OH)—O—, —O—P(O)(H)—O—, —O—P(S)(H)—O—, —S—P(O)(H)—O, —S—P(S)(H)—O—, —S—P(O)(H)—S—, and —O—P(S)(H)—S—, wherein Rk at each occurrence can be, independently, C1-C20 alkyl, C1-C20 haloalkyl, C6-C10 aryl, or C7-C12 aralkyl. In certain embodiments a phosphate-based linking group is —O—P(O)(OH)—O—. These candidates can be evaluated using methods analogous to those described above.

iii. Acid Cleavable Linking Groups

[0569] In other embodiments, a cleavable linker comprises an acid cleavable linking group. An acid cleavable linking group is a linking group that is cleaved under acidic conditions. In certain embodiments acid cleavable linking groups are cleaved in an acidic environment with a pH of about 6.5 or lower (e.g., about 6.0, 5.5, 5.0, or lower), or by agents such as enzymes that can act as a general acid. In a cell, specific low pH organelles, such as endosomes and lysosomes can provide a cleaving environment for acid cleavable linking groups. Examples of acid cleavable linking groups include but are not limited to hydrazones, esters, and esters of amino acids. Acid cleavable groups can have the general formula —C═NN—, C(O)O, or —OC(O). One exemplary embodiment is when the carbon attached to the oxygen of the ester (the alkoxy group) is an aryl group, substituted alkyl group, or tertiary alkyl group such as dimethyl pentyl or t-butyl. These candidates can be evaluated using methods analogous to those described above.

iv. Ester-Based Linking Groups

[0570] In other embodiments, a cleavable linker comprises an ester-based cleavable linking group. An ester-based cleavable linking group is cleaved by enzymes such as esterases and amidases in cells. Examples of ester-based cleavable linking groups include, but are not limited to, esters of alkylene, alkenylene and alkynylene groups. Ester cleavable linking groups have the general formula —C(O)O—, or —OC(O)—. These candidates can be evaluated using methods analogous to those described above.

v. Peptide-Based Cleaving Groups

[0571] In yet other embodiments, a cleavable linker comprises a peptide-based cleavable linking group. A peptide-based cleavable linking group is cleaved by enzymes such as peptidases and proteases in cells. Peptide-based cleavable linking groups are peptide bonds formed between amino acids to yield oligopeptides (e.g., dipeptides, tripeptides etc.) and polypeptides. Peptide-based cleavable groups do not include the amide group (—C(O)NH—). The amide group can be formed between any alkylene, alkenylene or alkynelene. A peptide bond is a special type of amide bond formed between amino acids to yield peptides and proteins. The peptide based cleavage group is generally limited to the peptide bond (i.e., the amide bond) formed between amino acids yielding peptides and proteins and does not include the entire amide functional group. Peptide-based cleavable linking groups have the general formula —NHCHR^AC(O)NHCHR^BC(O)—, where R^A and R^B are the R groups of the two adjacent amino acids. These candidates can be evaluated using methods analogous to those described above.

[0572] In some embodiments, an iRNA of the invention is conjugated to a carbohydrate through a linker. Non-limiting examples of iRNA carbohydrate conjugates with linkers of the compositions and methods of the invention include, but are not limited to,

[0573]
when one of X or Y is an oligonucleotide, the other is a hydrogen.

[0574] In certain embodiments of the compositions and methods of the invention, a ligand is one or more “GalNAc” (N-acetylgalactosamine) derivatives attached through a bivalent or trivalent branched linker.

[0575] In one embodiment, a dsRNA of the invention is conjugated to a bivalent or trivalent branched linker selected from the group of structures shown in any of formula (XLV)-(XLVI):

[0576]

• • [0577] wherein:
  • [0578] q2A, q2B, q3A, q3B, q4A, q4B, q5A, q5B and q5C represent independently for each occurrence 0-20 and wherein the repeating unit can be the same or different;
  • [0579] P^2A, P^2B, P^3A, P^3B, P^4A, P^4B, P^5A, P^5B, P^5C, T^2A, T^2B, T^3A, T^3B, T^4A, T^4B, T^4A, T^5B, T^5C are each independently for each occurrence absent, CO, NH, O, S, OC(O), NHC(O), CH₂, CH₂NH or CH₂O;
  • [0580] Q^2A, Q^2B, Q^3A, Q^3B, Q^4A, Q^4B, Q^5A, Q^5B, Q^5C are independently for each occurrence absent, alkylene, substituted alkylene wherein one or more methylenes can be interrupted or terminated by one or more of O, S, S(O), SO₂, N(R^N), C(R′)═C(R″), CEC or C(O);
  • [0581] R^2A, R^2B, R^3A, R^3B, R^4A, R^4B, R^5A, R^5B, R^5C are each independently for each occurrence absent, NH, O, S, CH₂, C(O)O, C(O)NH, NHCH(R^a)C(O), —C(O)—CH(R^a)—NH—, CO, CH═N—O,

[0582]
or heterocyclyl;

• • [0583] L^2A, L^2B, L^3A, L^3B, L^4A, L^4B, L^5A, L^5B and L^5C represent the ligand; i.e. each independently for each occurrence a monosaccharide (such as GalNAc), disaccharide, trisaccharide, tetrasaccharide, oligosaccharide, or polysaccharide; and R^a is H or amino acid side chain. Trivalent conjugating GalNAc derivatives are particularly useful for use with RNAi agents for inhibiting the expression of a target gene, such as those of formula (XLIX):

[0584]

• • [0585] wherein L^5A, L^5B and L^5C represent a monosaccharide, such as GalNAc derivative.

[0586] Examples of suitable bivalent and trivalent branched linker groups conjugating GalNAc derivatives include, but are not limited to, the structures recited above as formulas II, VII, XI, X, and XIII.

[0587] Representative U.S. Patents that teach the preparation of RNA conjugates include, but are not limited to, U.S. Pat. Nos. 4,828,979; 4,948,882; 5,218,105; 5,525,465; 5,541,313; 5,545,730; 5,552,538; 5,578,717, 5,580,731; 5,591,584; 5,109,124; 5,118,802; 5,138,045; 5,414,077; 5,486,603; 5,512,439; 5,578,718; 5,608,046; 4,587,044; 4,605,735; 4,667,025; 4,762,779; 4,789,737; 4,824,941; 4,835,263; 4,876,335; 4,904,582; 4,958,013; 5,082,830; 5,112,963; 5,214,136; 5,082,830; 5,112,963; 5,214,136; 5,245,022; 5,254,469; 5,258,506; 5,262,536; 5,272,250; 5,292,873; 5,317,098; 5,371,241, 5,391,723; 5,416,203, 5,451,463; 5,510,475; 5,512,667; 5,514,785; 5,565,552; 5,567,810; 5,574,142; 5,585,481; 5,587,371; 5,595,726; 5,597,696; 5,599,923; 5,599,928; 5,688,941; 6,294,664; 6,320,017; 6,576,752; 6,783,931; 6,900,297; 7,037,646; and 8,106,022, the entire contents of each of which are hereby incorporated herein by reference.

[0588] It is not necessary for all positions in a given compound to be uniformly modified, and in fact more than one of the aforementioned modifications can be incorporated in a single compound or even at a single nucleoside within an iRNA. The present invention also includes iRNA compounds that are chimeric compounds.

[0589] “Chimeric” iRNA compounds or “chimeras,” in the context of this invention, are iRNA compounds, such as dsRNAi agents, that contain two or more chemically distinct regions, each made up of at least one monomer unit, i.e., a nucleotide in the case of a dsRNA compound. These iRNAs typically contain at least one region wherein the RNA is modified so as to confer upon the iRNA increased resistance to nuclease degradation, increased cellular uptake, or increased binding affinity for the target nucleic acid. An additional region of the iRNA can serve as a substrate for enzymes capable of cleaving RNA:DNA or RNA:RNA hybrids. By way of example, RNase H is a cellular endonuclease which cleaves the RNA strand of an RNA:DNA duplex. Activation of RNase H, therefore, results in cleavage of the RNA target, thereby greatly enhancing the efficiency of iRNA inhibition of gene expression. Consequently, comparable results can often be obtained with shorter iRNAs when chimeric dsRNAs are used, compared to phosphorothioate deoxy dsRNAs hybridizing to the same target region. Cleavage of the RNA target can be routinely detected by gel electrophoresis and, if necessary, associated nucleic acid hybridization techniques known in the art.

[0590] In certain instances, the RNA of an iRNA can be modified by a non-ligand group. A number of non-ligand molecules have been conjugated to iRNAs in order to enhance the activity, cellular distribution or cellular uptake of the iRNA, and procedures for performing such conjugations are available in the scientific literature. Such non-ligand moieties have included lipid moieties, such as cholesterol (Kubo, T. et al., Biochem. Biophys. Res. Comm., 2007, 365(1):54-61; Letsinger et al., Proc. Natl. Acad. Sci. USA, 1989, 86:6553), cholic acid (Manoharan et al., Bioorg. Med. Chem. Lett., 1994, 4:1053), a thioether, e.g., hexyl-S-tritylthiol (Manoharan et al., Ann. N.Y. Acad. Sci., 1992, 660:306; Manoharan et al., Bioorg. Med. Chem. Let., 1993, 3:2765), a thiocholesterol (Oberhauser et al., Nucl. Acids Res., 1992, 20:533), an aliphatic chain, e.g., dodecandiol or undecyl residues (Saison-Behmoaras et al., EMBO J., 1991, 10:111; Kabanov et al., FEBS Lett., 1990, 259:327; Svinarchuk et al., Biochimie, 1993, 75:49), a phospholipid, e.g., di-hexadecyl-rac-glycerol or triethylammonium 1,2-di-O-hexadecyl-rac-glycero-3-H-phosphonate (Manoharan et al., Tetrahedron Lett., 1995, 36:3651; Shea et al., Nucl. Acids Res., 1990, 18:3777), a polyamine or a polyethylene glycol chain (Manoharan et al., Nucleosides & Nucleotides, 1995, 14:969), or adamantane acetic acid (Manoharan et al., Tetrahedron Lett., 1995, 36:3651), a palmityl moiety (Mishra et al., Biochim. Biophys. Acta, 1995, 1264:229), or an octadecylamine or hexylamino-carbonyl-oxycholesterol moiety (Crooke et al., J. Pharmacol. Exp. Ther., 1996, 277:923). Representative United States patents that teach the preparation of such RNA conjugates have been listed above. Typical conjugation protocols involve the synthesis of RNAs bearing an aminolinker at one or more positions of the sequence. The amino group is then reacted with the molecule being conjugated using appropriate coupling or activating reagents. The conjugation reaction can be performed either with the RNA still bound to the solid support or following cleavage of the RNA, in solution phase. Purification of the RNA conjugate by HPLC typically affords the pure conjugate.

[0591] The delivery of an iRNA of the invention to a cell e.g., a cell within a subject, such as a human subject (e.g., a subject in need thereof, such as a subject susceptible to or diagnosed with a MASP2-associated disorder, e.g., inflammation) can be achieved in a number of different ways. For example, delivery may be performed by contacting a cell with an iRNA of the invention either in vitro or in vivo. In vivo delivery may also be performed directly by administering a composition comprising an iRNA, e.g., a dsRNA, to a subject. Alternatively, in vivo delivery may be performed indirectly by administering one or more vectors that encode and direct the expression of the iRNA. These alternatives are discussed further below.

[0592] In general, any method of delivering a nucleic acid molecule (in vitro or in vivo) can be adapted for use with an iRNA of the invention (see e.g., Akhtar S. and Julian R L. (1992) Trends Cell. Biol. 2(5):139-144 and WO94/02595, which are incorporated herein by reference in their entireties). For in vivo delivery, factors to consider in order to deliver an iRNA molecule include, for example, biological stability of the delivered molecule, prevention of non-specific effects, and accumulation of the delivered molecule in the target tissue. RNA interference has also shown success with local delivery to the CNS by direct injection (Dorn, G., et al. (2004) Nucleic Acids 32:e49; Tan, P H., et al (2005) Gene Ther. 12:59-66; Makimura, H., et al (2002) BMC Neurosci. 3:18; Shishkina, G T., et al (2004) Neuroscience 129:521-528; Thakker, E R., et al (2004) Proc. Natl. Acad. Sci. U.S.A. 101:17270-17275; Akaneya, Y., et al (2005) J. Neurophysiol. 93:594-602). Modification of the RNA or the pharmaceutical carrier can also permit targeting of the iRNA to the target tissue and avoid undesirable off-target effects. iRNA molecules can be modified by chemical conjugation to lipophilic groups such as cholesterol to enhance cellular uptake and prevent degradation. For example, an iRNA directed against ApoB conjugated to a lipophilic cholesterol moiety was injected systemically into mice and resulted in knockdown of apoB mRNA in both the liver and jejunum (Soutschek, J., et al (2004) Nature 432:173-178).

[0593] In an alternative embodiment, the iRNA can be delivered using drug delivery systems such as a nanoparticle, a dendrimer, a polymer, liposomes, or a cationic delivery system. Positively charged cationic delivery systems facilitate binding of an iRNA molecule (negatively charged) and also enhance interactions at the negatively charged cell membrane to permit efficient uptake of an iRNA by the cell. Cationic lipids, dendrimers, or polymers can either be bound to an iRNA, or induced to form a vesicle or micelle (see e.g., Kim S H, et al (2008) Journal of Controlled Release 129(2):107-116) that encases an iRNA. The formation of vesicles or micelles further prevents degradation of the iRNA when administered systemically. Methods for making and administering cationic-iRNA complexes are well within the abilities of one skilled in the art (see e.g., Sorensen, D R, et al (2003) J. Mol. Biol 327:761-766; Verma, U N, et al (2003) Clin. Cancer Res. 9:1291-1300; Arnold, A S et al (2007) J. Hypertens. 25:197-205, which are incorporated herein by reference in their entirety). Some non-limiting examples of drug delivery systems useful for systemic delivery of iRNAs include DOTAP (Sorensen, D R., et al (2003), supra; Verma, U N, et al (2003), supra), “solid nucleic acid lipid particles” (Zimmermann, T S, et al (2006) Nature 441:111-114), cardiolipin (Chien, P Y, et al (2005) Cancer Gene Ther. 12:321-328; Pal, A, et al (2005) Int J. Oncol. 26:1087-1091), polyethyleneimine (Bonnet M E, et al (2008) Pharm. Res. August 16 Epub ahead of print; Aigner, A. (2006) J. Biomed. Biotechnol. 71659), Arg-Gly-Asp (RGD) peptides (Liu, S. (2006) Mol. Pharm. 3:472-487), and polyamidoamines (Tomalia, D A, et al (2007) Biochem. Soc. Trans. 35:61-67; Yoo, H., et al (1999) Pharm. Res. 16:1799-1804). In some embodiments, an iRNA forms a complex with cyclodextrin for systemic administration. Methods for administration and pharmaceutical compositions of iRNAs and cyclodextrins can be found in U.S. Pat. No. 7,427,605, which is herein incorporated by reference in its entirety.

[0594] A. Vector Encoded iRNAs of the Invention

[0595] iRNA targeting the MASP2 gene can be expressed from transcription units inserted into DNA or RNA vectors (see, e.g., Couture, A, et al., TIG. (1996), 12:5-10; Skillern, A, et al., International PCT Publication No. WO 00/22113, Conrad, International PCT Publication No. WO 00/22114, and Conrad, U.S. Pat. No. 6,054,299). Expression can be transient (on the order of hours to weeks) or sustained (weeks to months or longer), depending upon the specific construct used and the target tissue or cell type. These transgenes can be introduced as a linear construct, a circular plasmid, or a viral vector, which can be an integrating or non-integrating vector. The transgene can also be constructed to permit it to be inherited as an extrachromosomal plasmid (Gassmann, et al., Proc. Natl. Acad. Sci. USA (1995) 92:1292).

[0596] Viral vector systems which can be utilized with the methods and compositions described herein include, but are not limited to, (a) adenovirus vectors; (b) retrovirus vectors, including but not limited to lentiviral vectors, moloney murine leukemia virus, etc.; (c) adeno-associated virus vectors; (d) herpes simplex virus vectors; (e) SV 40 vectors; (f) polyoma virus vectors; (g) papilloma virus vectors; (h) picornavirus vectors; (i) pox virus vectors such as an orthopox, e.g., vaccinia virus vectors or avipox, e.g. canary pox or fowl pox; and (j) a helper-dependent or gutless adenovirus. Replication-defective viruses can also be advantageous. Different vectors will or will not become incorporated into the cells' genome. The constructs can include viral sequences for transfection, if desired. Alternatively, the construct can be incorporated into vectors capable of episomal replication, e.g. EPV and EBV vectors. Constructs for the recombinant expression of an iRNA will generally require regulatory elements, e.g., promoters, enhancers, etc., to ensure the expression of the iRNA in target cells. Other aspects to consider for vectors and constructs are known in the art.

[0597] The present invention also includes pharmaceutical compositions and formulations which include the iRNAs of the invention. In one embodiment, provided herein are pharmaceutical compositions containing an iRNA, as described herein, and a pharmaceutically acceptable carrier. The pharmaceutical compositions containing the iRNA are useful for preventing or treating a MASP2-associated disorder, e.g., inflammation. Such pharmaceutical compositions are formulated based on the mode of delivery. One example is compositions that are formulated for systemic administration via parenteral delivery, e.g., by subcutaneous (SC), intramuscular (IM), or intravenous (IV) delivery. The pharmaceutical compositions of the invention may be administered in dosages sufficient to inhibit expression of a MASP2 gene.

[0598] In some embodiments, the pharmaceutical compositions of the invention are sterile. In another embodiment, the pharmaceutical compositions of the invention are pyrogen free.

[0599] The pharmaceutical compositions of the invention may be administered in dosages sufficient to inhibit expression of a MASP2 gene. In general, a suitable dose of an iRNA of the invention will be in the range of about 0.001 to about 200.0 milligrams per kilogram body weight of the recipient per day, generally in the range of about 1 to 50 mg per kilogram body weight per day. Typically, a suitable dose of an iRNA of the invention will be in the range of about 0.1 mg/kg to about 5.0 mg/kg, about 0.3 mg/kg and about 3.0 mg/kg. A repeat-dose regimen may include administration of a therapeutic amount of iRNA on a regular basis, such as every month, once every 3-6 months, or once a year. In certain embodiments, the iRNA is administered about once per month to about once per six months.

[0600] After an initial treatment regimen, the treatments can be administered on a less frequent basis. Duration of treatment can be determined based on the severity of disease.

[0601] In other embodiments, a single dose of the pharmaceutical compositions can be long lasting, such that doses are administered at not more than 1, 2, 3, or 4 month intervals. In some embodiments of the invention, a single dose of the pharmaceutical compositions of the invention is administered about once per month. In other embodiments of the invention, a single dose of the pharmaceutical compositions of the invention is administered quarterly (i.e., about every three months). In other embodiments of the invention, a single dose of the pharmaceutical compositions of the invention is administered twice per year (i.e., about once every six months).

[0602] The skilled artisan will appreciate that certain factors can influence the dosage and timing required to effectively treat a subject, including but not limited to mutations present in the subject, previous treatments, the general health or age of the subject, and other diseases present. Moreover, treatment of a subject with a prophylactically or therapeutically effective amount, as appropriate, of a composition can include a single treatment or a series of treatments.

[0603] The iRNA can be delivered in a manner to target a particular tissue (e.g., hepatocytes).

[0604] Pharmaceutical compositions of the present invention include, but are not limited to, solutions, emulsions, and liposome-containing formulations. These compositions can be generated from a variety of components that include, but are not limited to, preformed liquids, self-emulsifying solids, and self-emulsifying semisolids. Formulations include those that target the liver.

[0605] The pharmaceutical formulations of the present invention, which can conveniently be presented in unit dosage form, can be prepared according to conventional techniques well known in the pharmaceutical industry. Such techniques include the step of bringing into association the active ingredients with the pharmaceutical carrier(s) or excipient(s). In general, the formulations are prepared by uniformly and intimately bringing into association the active ingredients with liquid carriers.

A. Additional Formulations

i. Emulsions

[0606] The compositions of the present invention can be prepared and formulated as emulsions. Emulsions are typically heterogeneous systems of one liquid dispersed in another in the form of droplets usually exceeding 0.1 μm in diameter (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, N.Y.; Idson, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 199; Rosoff, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., Volume 1, p. 245; Block in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 2, p. 335; Higuchi et al., in Remington's Pharmaceutical Sciences, Mack Publishing Co., Easton, Pa., 1985, p. 301). Emulsions are often biphasic systems comprising two immiscible liquid phases intimately mixed and dispersed with each other. In general, emulsions can be of either the water-in-oil (w/o) or the oil-in-water (o/w) variety. When an aqueous phase is finely divided into and dispersed as minute droplets into a bulk oily phase, the resulting composition is called a water-in-oil (w/o) emulsion. Alternatively, when an oily phase is finely divided into and dispersed as minute droplets into a bulk aqueous phase, the resulting composition is called an oil-in-water (o/w) emulsion. Emulsions can contain additional components in addition to the dispersed phases, and the active drug which can be present as a solution either in the aqueous phase, oily phase or itself as a separate phase. Pharmaceutical excipients such as emulsifiers, stabilizers, dyes, and anti-oxidants can also be present in emulsions as needed. Pharmaceutical emulsions can also be multiple emulsions that are comprised of more than two phases such as, for example, in the case of oil-in-water-in-oil (o/w/o) and water-in-oil-in-water (w/o/w) emulsions. Such complex formulations often provide certain advantages that simple binary emulsions do not. Multiple emulsions in which individual oil droplets of an o/w emulsion enclose small water droplets constitute a w/o/w emulsion. Likewise, a system of oil droplets enclosed in globules of water stabilized in an oily continuous phase provides an o/w/o emulsion.

[0607] Emulsions are characterized by little or no thermodynamic stability. Often, the dispersed or discontinuous phase of the emulsion is well dispersed into the external or continuous phase and maintained in this form through the means of emulsifiers or the viscosity of the formulation. Other means of stabilizing emulsions entail the use of emulsifiers that can be incorporated into either phase of the emulsion. Emulsifiers can broadly be classified into four categories: synthetic surfactants, naturally occurring emulsifiers, absorption bases, and finely dispersed solids (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY; Idson, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 199).

[0608] Synthetic surfactants, also known as surface active agents, have found wide applicability in the formulation of emulsions and have been reviewed in the literature (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY; Rieger, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 285; Idson, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), Marcel Dekker, Inc., New York, N.Y., 1988, volume 1, p. 199). Surfactants are typically amphiphilic and comprise a hydrophilic and a hydrophobic portion. The ratio of the hydrophilic to the hydrophobic nature of the surfactant has been termed the hydrophile/lipophile balance (HLB) and is a valuable tool in categorizing and selecting surfactants in the preparation of formulations. Surfactants can be classified into different classes based on the nature of the hydrophilic group: nonionic, anionic, cationic, and amphoteric (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY Rieger, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 285).

[0609] A large variety of non-emulsifying materials are also included in emulsion formulations and contribute to the properties of emulsions. These include fats, oils, waxes, fatty acids, fatty alcohols, fatty esters, humectants, hydrophilic colloids, preservatives, and antioxidants (Block, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 335; Idson, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 199).

[0610] The application of emulsion formulations via dermatological, oral, and parenteral routes, and methods for their manufacture have been reviewed in the literature (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY; Idson, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 199).

ii. Microemulsions

[0611] In one embodiment of the present invention, the compositions of iRNAs and nucleic acids are formulated as microemulsions. A microemulsion can be defined as a system of water, oil, and amphiphile which is a single optically isotropic and thermodynamically stable liquid solution (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, L V., Popovich N G., and Ansel H C., 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY; Rosoff, in Pharmaceutical Dosage Forms, Lieberman, Rieger and Banker (Eds.), 1988, Marcel Dekker, Inc., New York, N.Y., volume 1, p. 245). Typically, microemulsions are systems that are prepared by first dispersing an oil in an aqueous surfactant solution and then adding a sufficient amount of a fourth component, generally an intermediate chain-length alcohol to form a transparent system. Therefore, microemulsions have also been described as thermodynamically stable, isotropically clear dispersions of two immiscible liquids that are stabilized by interfacial films of surface-active molecules (Leung and Shah, in: Controlled Release of Drugs: Polymers and Aggregate Systems, Rosoff, M., Ed., 1989, VCH Publishers, New York, pages 185-215).

iii. Microparticles

[0612] An iRNA of the invention may be incorporated into a particle, e.g., a microparticle. Microparticles can be produced by spray-drying, but may also be produced by other methods including lyophilization, evaporation, fluid bed drying, vacuum drying, or a combination of these techniques.

iv. Penetration Enhancers

[0613] In one embodiment, the present invention employs various penetration enhancers to effect the efficient delivery of nucleic acids, particularly iRNAs, to the skin of animals Most drugs are present in solution in both ionized and nonionized forms. However, usually only lipid soluble or lipophilic drugs readily cross cell membranes. It has been discovered that even non-lipophilic drugs can cross cell membranes if the membrane to be crossed is treated with a penetration enhancer. In addition to aiding the diffusion of non-lipophilic drugs across cell membranes, penetration enhancers also enhance the permeability of lipophilic drugs.

[0614] Penetration enhancers can be classified as belonging to one of five broad categories, i.e., surfactants, fatty acids, bile salts, chelating agents, and non-chelating non-surfactants (see e.g., Malmsten, M. Surfactants and polymers in drug delivery, Informa Health Care, New York, NY, 2002; Lee et al., Critical Reviews in Therapeutic Drug Carrier Systems, 1991, p. 92). Each of the above mentioned classes of penetration enhancers and their use in manufacture of pharmaceutical compositions and delivery of pharmaceutical agents are well known in the art.

v. Excipients

[0615] In contrast to a carrier compound, a “pharmaceutical carrier” or “excipient” is a pharmaceutically acceptable solvent, suspending agent, or any other pharmacologically inert vehicle for delivering one or more nucleic acids to an animal. The excipient can be liquid or solid and is selected, with the planned manner of administration in mind, so as to provide for the desired bulk, consistency, etc., when combined with a nucleic acid and the other components of a given pharmaceutical composition. Such agents are well known in the art.

vi. Other Components

[0616] The compositions of the present invention can additionally contain other adjunct components conventionally found in pharmaceutical compositions, at their art-established usage levels. Thus, for example, the compositions can contain additional, compatible, pharmaceutically-active materials such as, for example, antipruritics, astringents, local anesthetics or anti-inflammatory agents, or can contain additional materials useful in physically formulating various dosage forms of the compositions of the present invention, such as dyes, flavoring agents, preservatives, antioxidants, opacifiers, thickening agents and stabilizers. However, such materials, when added, should not unduly interfere with the biological activities of the components of the compositions of the present invention. The formulations can be sterilized and, if desired, mixed with auxiliary agents, e.g., lubricants, preservatives, stabilizers, wetting agents, emulsifiers, salts for influencing osmotic pressure, buffers, colorings, flavorings, or aromatic substances, and the like which do not deleteriously interact with the nucleic acid(s) of the formulation.

[0617] Aqueous suspensions can contain substances which increase the viscosity of the suspension including, for example, sodium carboxymethylcellulose, sorbitol, or dextran. The suspension can also contain stabilizers.

[0618] In some embodiments, pharmaceutical compositions featured in the invention include (a) one or more iRNA and (b) one or more agents which function by a non-iRNA mechanism and which are useful in treating a MASP2-associated disorder, e.g., inflammation.

[0619] Toxicity and prophylactic efficacy of such compounds can be determined by standard pharmaceutical procedures in cell cultures or experimental animals, e.g., for determining the LD50 (the dose lethal to 50% of the population) and the ED50 (the dose prophylactically effective in 50% of the population). The dose ratio between toxic and therapeutic effects is the therapeutic index and it can be expressed as the ratio LD50/ED50. Compounds that exhibit high therapeutic indices are typical.

[0620] The data obtained from cell culture assays and animal studies can be used in formulating a range of dosage for use in humans. The dosage of compositions featured herein in the invention lies generally within a range of circulating concentrations that include the ED50, such as an ED80 or ED90, with little or no toxicity. The dosage can vary within this range depending upon the dosage form employed and the route of administration utilized. For any compound used in the methods featured in the invention, the prophylactically effective dose can be estimated initially from cell culture assays. A dose can be formulated in animal models to achieve a circulating plasma concentration range of the compound or, when appropriate, of the polypeptide product of a target sequence (e.g., achieving a decreased concentration of the polypeptide) that includes the IC50 (i.e., the concentration of the test compound which achieves a half-maximal inhibition of symptoms) or higher levels of inhibition as determined in cell culture. Such information can be used to more accurately determine useful doses in humans. Levels in plasma can be measured, for example, by high performance liquid chromatography.

[0621] In addition to their administration, as discussed above, the iRNAs featured in the invention can be administered in combination with other known agents used for the prevention or treatment of a MASP2-associated disorder, e.g., inflammation. In any event, the administering physician can adjust the amount and timing of iRNA administration on the basis of results observed using standard measures of efficacy known in the art or described herein.

[0622] The present invention also provides methods of inhibiting expression of a MASP2 gene in a cell. The methods include contacting a cell with an RNAi agent, e.g., double stranded RNA agent, in an amount effective to inhibit expression of MASP2 in the cell, thereby inhibiting expression of MASP2 in the cell.

[0623] Contacting of a cell with an iRNA, e.g., a double stranded RNA agent, may be done in vitro or in vivo. Contacting a cell in vivo with the iRNA includes contacting a cell or group of cells within a subject, e.g., a human subject, with the iRNA. Combinations of in vitro and in vivo methods of contacting a cell are also possible. Contacting a cell may be direct or indirect, as discussed above. Furthermore, contacting a cell may be accomplished via a targeting ligand, including any ligand described herein or known in the art. In certain embodiments, the targeting ligand is a carbohydrate moiety, e.g., a GalNAc₃ ligand, or any other ligand that directs the RNAi agent to a site of interest.

[0624] The term “inhibiting,” as used herein, is used interchangeably with “reducing,” “silencing,” “downregulating”, “suppressing”, and other similar terms, and includes any level of inhibition.

[0625] The phrase “inhibiting expression of a MASP2” is intended to refer to inhibition of expression of any MASP2 gene (such as, e.g., a mouse MASP2 gene, a rat MASP2 gene, a monkey MASP2 gene, or a human MASP2 gene) as well as variants or mutants of a MASP2 gene. Thus, the MASP2 gene may be a wild-type MASP2 gene, a mutant MASP2 gene, or a transgenic MASP2 gene in the context of a genetically manipulated cell, group of cells, or organism.

[0626] “Inhibiting expression of a MASP2 gene” includes any level of inhibition of a MASP2 gene, e.g., at least partial suppression of the expression of a MASP2 gene. The expression of the MASP2 gene may be assessed based on the level, or the change in the level, of any variable associated with MASP2 gene expression, e.g., MASP2 mRNA level or MASP2 protein level. This level may be assessed in an individual cell or in a group of cells, including, for example, a sample derived from a subject. It is understood that MASP2 is expressed predominantly in the liver, but also in the brain, gall bladder, heart, and kidney, and is present in circulation.

[0627] Inhibition may be assessed by a decrease in an absolute or relative level of one or more variables that are associated with MASP2 expression compared with a control level. The control level may be any type of control level that is utilized in the art, e.g., a pre-dose baseline level, or a level determined from a similar subject, cell, or sample that is untreated or treated with a control (such as, e.g., buffer only control or inactive agent control).

[0628] In some embodiments of the methods of the invention, expression of a MASP2 gene is inhibited by at least 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, or to below the level of detection of the assay. In certain embodiments, expression of a MASP2 gene is inhibited by at least 70%. It is further understood that inhibition of MASP2 expression in certain tissues, e.g., in liver, without a significant inhibition of expression in other tissues, e.g., brain, may be desirable. In certain embodiments, expression level is determined using the assay method provided in Example 2 with a 10 nM siRNA concentration in the appropriate species matched cell line.

[0629] In certain embodiments, inhibition of expression in vivo is determined by knockdown of the human gene in a rodent expressing the human gene, e.g., an AAV-infected mouse expressing the human target gene (i.e., MASP2), e.g., when administered as a single dose, e.g., at 3 mg/kg at the nadir of RNA expression. Knockdown of expression of an endogenous gene in a model animal system can also be determined, e.g., after administration of a single dose at, e.g., 3 mg/kg at the nadir of RNA expression. Such systems are useful when the nucleic acid sequence of the human gene and the model animal gene are sufficiently close such that the human iRNA provides effective knockdown of the model animal gene. RNA expression in liver is determined using the PCR methods provided in Example 2.

[0630] Inhibition of the expression of a MASP2 gene may be manifested by a reduction of the amount of mRNA expressed by a first cell or group of cells (such cells may be present, for example, in a sample derived from a subject) in which a MASP2 gene is transcribed and which has or have been treated (e.g., by contacting the cell or cells with an iRNA of the invention, or by administering an iRNA of the invention to a subject in which the cells are or were present) such that the expression of a MASP2 gene is inhibited, as compared to a second cell or group of cells substantially identical to the first cell or group of cells but which has not or have not been so treated (control cell(s) not treated with an iRNA or not treated with an iRNA targeted to the gene of interest). In some embodiments, the inhibition is assessed by the method provided in Example 2 using a 10 nM siRNA concentration in the species matched cell line and expressing the level of mRNA in treated cells as a percentage of the level of mRNA in control cells, using the following formula:

[0631] $\frac{\left(\mathrm{mRNA}\mathrm{in}\mathrm{control}\mathrm{cells}\right)-\left(\mathrm{mRNA}\mathrm{in}\mathrm{treated}\mathrm{cells}\right)}{\left(\mathrm{mRNA}\mathrm{in}\mathrm{control}\mathrm{cells}\right)}•100\%$

[0632] In other embodiments, inhibition of the expression of a MASP2 gene may be assessed in terms of a reduction of a parameter that is functionally linked to MASP2 gene expression, e.g., MASP2 protein level in blood or serum from a subject. MASP2 gene silencing may be determined in any cell expressing MASP2, either endogenous or heterologous from an expression construct, and by any assay known in the art.

[0633] Inhibition of the expression of a MASP2 protein may be manifested by a reduction in the level of the MASP2 protein that is expressed by a cell or group of cells or in a subject sample (e.g., the level of protein in a blood sample derived from a subject). As explained above, for the assessment of mRNA suppression, the inhibition of protein expression levels in a treated cell or group of cells may similarly be expressed as a percentage of the level of protein in a control cell or group of cells, or the change in the level of protein in a subject sample, e.g., blood or serum derived therefrom.

[0634] A control cell, a group of cells, or subject sample that may be used to assess the inhibition of the expression of a MASP2 gene includes a cell, group of cells, or subject sample that has not yet been contacted with an RNAi agent of the invention. For example, the control cell, group of cells, or subject sample may be derived from an individual subject (e.g., a human or animal subject) prior to treatment of the subject with an RNAi agent or an appropriately matched population control.

[0635] The level of MASP2 mRNA that is expressed by a cell or group of cells may be determined using any method known in the art for assessing mRNA expression. In one embodiment, the level of expression of MASP2 in a sample is determined by detecting a transcribed polynucleotide, or portion thereof, e.g., mRNA of the MASP2 gene. RNA may be extracted from cells using RNA extraction techniques including, for example, using acid phenol/guanidine isothiocyanate extraction (RNAzol B; Biogenesis), RNeasy™ RNA preparation kits (Qiagen®) or PAXgene™ (PreAnalytix™, Switzerland). Typical assay formats utilizing ribonucleic acid hybridization include nuclear run-on assays, RT-PCR, RNase protection assays, northern blotting, in situ hybridization, and microarray analysis.

[0636] In some embodiments, the level of expression of MASP2 is determined using a nucleic acid probe. The term “probe”, as used herein, refers to any molecule that is capable of selectively binding to a specific MASP2. Probes can be synthesized by one of skill in the art, or derived from appropriate biological preparations. Probes may be specifically designed to be labeled. Examples of molecules that can be utilized as probes include, but are not limited to, RNA, DNA, proteins, antibodies, and organic molecules.

[0637] Isolated mRNA can be used in hybridization or amplification assays that include, but are not limited to, Southern or northern analyses, polymerase chain reaction (PCR) analyses and probe arrays. One method for the determination of mRNA levels involves contacting the isolated mRNA with a nucleic acid molecule (probe) that can hybridize to MASP2 mRNA. In one embodiment, the mRNA is immobilized on a solid surface and contacted with a probe, for example by running the isolated mRNA on an agarose gel and transferring the mRNA from the gel to a membrane, such as nitrocellulose. In an alternative embodiment, the probe(s) are immobilized on a solid surface and the mRNA is contacted with the probe(s), for example, in an Affymetrix® gene chip array. A skilled artisan can readily adapt known mRNA detection methods for use in determining the level of MASP2 mRNA.

[0638] An alternative method for determining the level of expression of MASP2 in a sample involves the process of nucleic acid amplification or reverse transcriptase (to prepare cDNA) of for example mRNA in the sample, e.g., by RT-PCR (the experimental embodiment set forth in Mullis, 1987, U.S. Pat. No. 4,683,202), ligase chain reaction (Barany (1991) Proc. Natl. Acad. Sci. USA 88:189-193), self sustained sequence replication (Guatelli et al. (1990) Proc. Natl. Acad. Sci. USA 87:1874-1878), transcriptional amplification system (Kwoh et al. (1989) Proc. Natl. Acad. Sci. USA 86:1173-1177), Q-Beta Replicase (Lizardi et al. (1988) Bio/Technology 6:1197), rolling circle replication (Lizardi et al., U.S. Pat. No. 5,854,033) or any other nucleic acid amplification method, followed by the detection of the amplified molecules using techniques well known to those of skill in the art. These detection schemes are especially useful for the detection of nucleic acid molecules if such molecules are present in very low numbers. In particular aspects of the invention, the level of expression of MASP2 is determined by quantitative fluorogenic RT-PCR (i.e., the TaqMan′ System). In certain embodiments, expression level is determined by the method provided in Example 2 using, e.g., a 10 nM siRNA concentration, in the species matched cell line.

[0639] The expression levels of MASP2 mRNA may be monitored using a membrane blot (such as used in hybridization analysis such as northern, Southern, dot, and the like), or microwells, sample tubes, gels, beads or fibers (or any solid support comprising bound nucleic acids). See U.S. Pat. Nos. 5,770,722, 5,874,219, 5,744,305, 5,677,195 and 5,445,934, which are incorporated herein by reference. The determination of MASP2 expression level may also comprise using nucleic acid probes in solution.

[0640] In certain embodiments, the level of mRNA expression is assessed using branched DNA (bDNA) assays or real time PCR (qPCR). The use of these methods is described and exemplified in the Examples presented herein. In certain embodiments, expression level is determined by the method provided in Example 2 using a 10 nM siRNA concentration in the species matched cell line.

[0641] The level of MASP2 protein expression may be determined using any method known in the art for the measurement of protein levels. Such methods include, for example, electrophoresis, capillary electrophoresis, high performance liquid chromatography (HPLC), thin layer chromatography (TLC), hyperdiffusion chromatography, fluid or gel precipitin reactions, absorption spectroscopy, a colorimetric assays, spectrophotometric assays, flow cytometry, immunodiffusion (single or double), immunoelectrophoresis, western blotting, radioimmunoassay (RIA), enzyme-linked immunosorbent assays (ELISAs), immunofluorescent assays, electrochemiluminescence assays, and the like.

[0642] In some embodiments, the efficacy of the methods of the invention are assessed by a decrease in MASP2 mRNA or protein level (e.g., in a liver biopsy).

[0643] In some embodiments of the methods of the invention, the iRNA is administered to a subject such that the iRNA is delivered to a specific site within the subject. The inhibition of expression of MASP2 may be assessed using measurements of the level or change in the level of MASP2 mRNA or MASP2 protein in a sample derived from fluid or tissue from the specific site within the subject (e.g., liver or blood).

[0644] As used herein, the terms detecting or determining a level of an analyte are understood to mean performing the steps to determine if a material, e.g., protein, RNA, is present. As used herein, methods of detecting or determining include detection or determination of an analyte level that is below the level of detection for the method used.

[0645] The present invention also provides methods of using an iRNA of the invention or a composition containing an iRNA of the invention to inhibit expression of MASP2, thereby preventing or treating a MASP2-associated disorder, e.g., arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0646] In the methods of the invention the cell may be contacted with the siRNA in vitro or in vivo, i.e., the cell may be within a subject.

[0647] A cell suitable for treatment using the methods of the invention may be any cell that expresses a MASP2 gene, e.g., a liver cell, a kidney cell, or a heart cell. A cell suitable for use in the methods of the invention may be a mammalian cell, e.g., a primate cell (such as a human cell, including human cell in a chimeric non-human animal, or a non-human primate cell, e.g., a monkey cell or a chimpanzee cell), or a non-primate cell. In certain embodiments, the cell is a human cell, e.g., a human liver cell. In the methods of the invention, MASP2 expression is inhibited in the cell by at least 50, 55, 60, 65, 70, 75, 80, 85, 90, or 95, or to a level below the level of detection of the assay.

[0648] The in vivo methods of the invention may include administering to a subject a composition containing an iRNA, where the iRNA includes a nucleotide sequence that is complementary to at least a part of an RNA transcript of the MASP2 gene of the mammal to which the RNAi agent is to be administered. The composition can be administered by any means known in the art including, but not limited to oral, intraperitoneal, or parenteral routes, including intracranial (e.g., intraventricular, intraparenchymal, and intrathecal), intravenous, intramuscular, subcutaneous, transdermal, airway (aerosol), nasal, rectal, and topical (including buccal and sublingual) administration. In certain embodiments, the compositions are administered by intravenous infusion or injection. In certain embodiments, the compositions are administered by subcutaneous injection. In certain embodiments, the compositions are administered by intramuscular injection.

[0649] In one aspect, the present invention also provides methods for inhibiting the expression of a MASP2 gene in a mammal. The methods include administering to the mammal a composition comprising a dsRNA that targets a MASP2 gene in a cell of the mammal and maintaining the mammal for a time sufficient to obtain degradation of the mRNA transcript of the MASP2 gene, thereby inhibiting expression of the MASP2 gene in the cell. Reduction in gene expression can be assessed by any methods known in the art and by methods, e.g. qRT-PCR, described herein, e.g., in Example 2. Reduction in protein production can be assessed by any methods known it the art, e.g. ELISA. In certain embodiments, a puncture liver biopsy sample serves as the tissue material for monitoring the reduction in the MASP2 gene or protein expression. In other embodiments, a blood sample serves as the subject sample for monitoring the reduction in the MASP2 protein expression.

[0650] The present invention further provides methods of treatment in a subject in need thereof, e.g., a subject diagnosed with a MASP2-associated disorder, such as, arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0651] The present invention further provides methods of prophylaxis in a subject in need thereof. The treatment methods of the invention include administering an iRNA of the invention to a subject, e.g., a subject that would benefit from a reduction of MASP2 expression, in a prophylactically effective amount of an iRNA targeting a MASP2 gene or a pharmaceutical composition comprising an iRNA targeting a MASP2 gene.

[0652] In one embodiment, a MASP2-associated disease is selected from the group consisting of arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0653] In one embodiment, a MASP2-associated disease is arthritis. Arthritis is a disorder that affects joints and causes inflammation, joint pain and swelling. There are several types of arthritis, including the most common types osteoarthritis and rheumatoid arthritis. Osteoarthritis is a slow, progressive degenerative joint disease that results from the breakdown of cartilage in the joint. Rheumatoid arthritis is an autoimmune disease causes inflammation in the joints but may also affect other parts of the body, such as the lungs, skin and heart.

[0654] In one embodiment, a MASP2-associated disease is IgA nephropathy. IgA nephropathy, also called Berger's disease, is a kidney disease caused by accumulation of IgA antibody in the kidney glomeruli resulting in inflammation or glomerulonephritis. Most patients present with a non-aggressive form of the disease while a small percentage develop aggressive disease. Over time, IgA nephropathy can cause kidney disease and lead to kidney failure.

[0655] In one embodiment, a MASP2-associated disease is thrombotic microangiopathy. In thrombotic microangiopathy, thrombosis occurs in the capillaries and arterioles resulting from a vascular endothelial injury. There are several types of thrombotic microangiopathies, including, for example, hemolytic uremic syndrome, thrombotic thrombocytopenic purpura and atypical uremic syndrome. Patients with thrombotic microangiopathies typically present with anemia, thrombocytopenia and kidney failure.

[0656] In one embodiment, a MASP2-associated disease is diabetic nephropathy. diabetic nephropathy is a kidney disease caused by diabetes and is the leading cause of chronic kidney disease in the United States. Diabetic nephropathy is characterized by high protein levels in the urine, glomerular lesions and a reduction in glomerular filtration rate.

[0657] In one embodiment, a MASP2-associated disease is membranous nephropathy. Membranous nephropathy is characterized by formation of immune complexes in the glomerulus in the kidney. The immune complexes trigger complement activation which causes epithelial and mesenchymal cells to release proteases and other agents that damage capillary walls. Membranous nephropathy typically presents with proteinuria and edema and is a slow progressing disease.

[0658] An iRNA of the invention may be administered as a “free iRNA.” A free iRNA is administered in the absence of a pharmaceutical composition. The naked iRNA may be in a suitable buffer solution. The buffer solution may comprise acetate, citrate, prolamine, carbonate, or phosphate, or any combination thereof. In one embodiment, the buffer solution is phosphate buffered saline (PBS). The pH and osmolarity of the buffer solution containing the iRNA can be adjusted such that it is suitable for administering to a subject.

[0659] Alternatively, an iRNA of the invention may be administered as a pharmaceutical composition, such as a dsRNA liposomal formulation.

[0660] Subjects that would benefit from an inhibition of MASP2 gene expression are subjects susceptible to or diagnosed with a MASP2-associated disorder, such as arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0661] In an embodiment, the method includes administering a composition featured herein such that expression of the target MASP2 gene is decreased, such as for about 1, 2, 3, 4, 5, 6, 1-6, 1-3, or 3-6 months per dose. In certain embodiments, the composition is administered once every 3-6 months.

[0662] In certain embodiments, the iRNAs useful for the methods and compositions featured herein specifically target RNAs (primary or processed) of the target MASP2 gene. Compositions and methods for inhibiting the expression of these genes using iRNAs can be prepared and performed as described herein.

[0663] Administration of the iRNA according to the methods of the invention may result prevention or treatment of a MASP2-associated disorder, e.g., arthritis, IgA nephropathy, thrombotic microangiopathy, diabetic nephropathy and membranous nephropathy.

[0664] In certain embodiments, subjects can be administered a therapeutic amount of dsRNA, such as about 0.01 mg/kg to about 200 mg/kg. In other embodiments, subjects can be administered a therapeutic amount of dsRNA, such as about 0.01 mg/kg to about 500 mg/kg. In yet other embodiments, subjects can be administered a therapeutic amount of dsRNA of about 500 mg/kg or more.

[0665] The iRNA is typically administered subcutaneously, i.e., by subcutaneous injection. One or more injections may be used to deliver the desired dose of iRNA to a subject. The injections may be repeated over a period of time.

[0666] The administration may be repeated on a regular basis. In certain embodiments, after an initial treatment regimen, the treatments can be administered on a less frequent basis. A repeat-dose regimen may include administration of a therapeutic amount of iRNA on a regular basis, such as once per month to once a year. In certain embodiments, the iRNA is administered about once per month to about once every three months, or about once every three months to about once every six months.

[0667] The invention further provides methods and uses of an iRNA agent or a pharmaceutical composition thereof for treating a subject that would benefit from reduction and/or inhibition of MASP2 gene expression, e.g., a subject having a MASP2-associated disease, in combination with other pharmaceuticals and/or other therapeutic methods, e.g., with known pharmaceuticals and/or known therapeutic methods, such as, for example, those which are currently employed for treating these disorders.

[0668] Accordingly, in some aspects of the invention, the methods which include either a single iRNA agent of the invention, further include administering to the subject one or more additional therapeutic agents.

[0669] The iRNA agent and an additional therapeutic agent and/or treatment may be administered at the same time and/or in the same combination, e.g., parenterally, or the additional therapeutic agent can be administered as part of a separate composition or at separate times and/or by another method known in the art or described herein.

[0670] For example, additional therapeutics and therapeutic methods suitable for treating a subject that would benefit from reduction in MASP2 expression, e.g., a subject having a MASP2-associated disease, include plasmaphoresis, thrombolytic therapy (e.g., streptokinase), antiplatelet agents, folic acid, corticosteroids; immunosuppressive agents; estrogens, methotrexate, 6-MP, azathioprine sulphasalazine, mesalazine, olsalazine, chloroquinine/hydroxychloroquine, pencillamine, aurothiomalate (intramuscular and oral), azathioprine, cochicine, corticosteroids (oral, inhaled and local injection), beta-2 adrenoreceptor agonists (salbutamol, terbutaline, salmeteral), xanthines (theophylline, aminophylline), cromoglycate, nedocromil, ketotifen, ipratropium and oxitropium, cyclosporin, FK506, rapamycin, mycophenolate mofetil, leflunomide, NSAIDs, for example, ibuprofen, corticosteroids such as prednisolone, phosphodiesterase inhibitors, adensosine agonists, antithrombotic agents, complement inhibitors, adrenergic agents, agents which interfere with signalling by proinflammatory cytokines, such as TNF-α or IL-1 (e.g., IRAK, NIK, IKK, p38 or MAP kinase inhibitors), IL-1β converting enzyme inhibitors, TNFα converting enzyme (TACE) inhibitors, T-cell signalling inhibitors, such as kinase inhibitors, metalloproteinase inhibitors, sulfasalazine, azathioprine, 6-mercaptopurines, angiotensin converting enzyme inhibitors, soluble cytokine receptors and derivatives thereof (e.g., soluble p55 or p75 TNF receptors and the derivatives p75TNFRIgG (Enbrel™ and p55TNFRIgG (Lenercept)), sIL-1RI, sIL-1RII, and sIL-6R), anti-inflammatory cytokines (e.g., IL-4, IL-10, IL-11, IL-13 and TGFβ), celecoxib, folic acid, hydroxychloroquine sulfate, rofecoxib, etanercept, infliximonoclonal antibody, naproxen, valdecoxib, sulfasalazine, methylprednisolone, meloxicam, methylprednisolone acetate, gold sodium thiomalate, aspirin, triamcinolone acetonide, propoxyphene napsylate/apap, folate, nabumetone, diclofenac, piroxicam, etodolac, diclofenac sodium, oxaprozin, oxycodone hydrochloride, hydrocodone bitartrate/apap, diclofenac sodium/misoprostol, fentanyl, anakinra, human recombinant, tramadol hydrochloride, salsalate, sulindac, cyanocobalamin/folic acid/pyridoxine, acetaminophen, alendronate sodium, prednisolone, morphine sulfate, lidocaine hydrochloride, indomethacin, glucosamine sulf/chondroitin, amitriptyline hydrochloride, sulfadiazine, oxycodone hydrochloride/acetaminophen, olopatadine hydrochloride, misoprostol, naproxen sodium, omeprazole, cyclophosphamide, rituximonoclonal antibody, IL-1 TRAP, MRA, CTLA4-IG, IL-18 BP, anti-IL-18, Anti-IL15, BIRB-796, SC10-469, VX-702, AMG-548, VX-740, Roflumilast, IC-485, CDC-801, Mesopram, cyclosporine, cytokine suppressive anti-inflammatory drug(s) (CSAIDs); CDP-571/BAY-10-3356 (humanized anti-TNFα antibody; Celltech/Bayer); cA2/infliximonoclonal antibody (chimeric anti-TNFα antibody; Centocor); 75 kdTNFR-IgG/etanercept (75 kD TNF receptor-IgG fusion protein; Immunex; see e.g., (1994) Arthr. Rheum. 37: 5295; (1996) J. Invest. Med. 44: 235A); 55 kdTNF-IgG (55 kD TNF receptor-IgG fusion protein; Hoffmann-LaRoche); IDEC-CE9.1/SB 210396 (non-depleting primatized anti-CD4 antibody; IDEC/SmithKline; see e.g., (1995) Arthr. Rheum. 38: S185); DAB 486-IL-2 and/or DAB 389-IL-2 (IL-2 fusion proteins; Seragen; see e.g., (1993) Arthrit. Rheum. 36: 1223); Anti-Tac (humanized anti-IL-2R^a; Protein Design Labs/Roche); IL-4 (anti-inflammatory cytokine; DNAX/Schering); IL-10 (SCH 52000; recombinant IL-10, anti-inflammatory cytokine; DNAX/Schering); IL-4; IL-10 and/or IL-4 agonists (e.g., agonist antibodies); IL-1RA (IL-1 receptor antagonist; Synergen/Amgen); anakinra (Kineret®/Amgen); TNF-bp/s-TNF (soluble TNF binding protein; see e.g., (1996) Arthr. Rheum. 39(9 (supplement)): 5284; (1995) Amer. J. Physiol.—Heart and Circ. Physiol. 268: 37-42); R973401 (phosphodiesterase Type IV inhibitor; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S282); MK-966 (COX-2 Inhibitor; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S81); Iloprost (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S82); methotrexate; thalidomide (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): 5282) and thalidomide-related drugs (e.g., Celgen); leflunomide (anti-inflammatory and cytokine inhibitor; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): 5131; (1996) Inflamm. Res. 45: 103-107); tranexamic acid (inhibitor of plasminogen activation; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S284); T-614 (cytokine inhibitor; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S282); prostaglandin E1 (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S282); Tenidap (non-steroidal anti-inflammatory drug; see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S280); Naproxen (non-steroidal anti-inflammatory drug; see e.g., (1996) Neuro. Report 7: 1209-1213); Meloxicam (non-steroidal anti-inflammatory drug); Ibuprofen (non-steroidal anti-inflammatory drug); Piroxicam (non-steroidal anti-inflammatory drug); Diclofenac (non-steroidal anti-inflammatory drug); Indomethacin (non-steroidal anti-inflammatory drug); Sulfasalazine (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S281); Azathioprine (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S281); ICE inhibitor (inhibitor of the enzyme interleukin-1β converting enzyme); zap-70 and/or lck inhibitor (inhibitor of the tyrosine kinase zap-70 or lck); VEGF inhibitor and/or VEGF-R inhibitor (inhibitors of vascular endothelial cell growth factor or vascular endothelial cell growth factor receptor; inhibitors of angiogenesis); corticosteroid anti-inflammatory drugs (e.g., SB203580); TNF-convertase inhibitors; anti-IL-12 antibodies; anti-IL-18 antibodies; interleukin-11 (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S296); interleukin-13 (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S308); interleukin-17 inhibitors (see e.g., (1996) Arthr. Rheum. 39(9 (supplement): S120); gold; penicillamine; chloroquine; chlorambucil; hydroxychloroquine; cyclosporine; cyclophosphamide; total lymphoid irradiation; anti-thymocyte globulin; anti-CD4 antibodies; CD5-toxins; orally-administered peptides and collagen; lobenzarit disodium; Cytokine Regulating Agents (CRAs) HP228 and HP466 (Houghten Pharmaceuticals, Inc.); ICAM-1 antisense phosphorothioate oligo-deoxynucleotides (ISIS 2302; Isis Pharmaceuticals, Inc.); soluble complement receptor 1 (TP10; T Cell Sciences, Inc.); prednisone; orgotein; glycosaminoglycan polysulphate; minocycline; anti-IL2R antibodies; marine and botanical lipids (fish and plant seed fatty acids; see e.g., DeLuca et al. (1995) Rheum. Dis. Clin. North Am. 21: 759-777); auranofin; phenylbutazone; meclofenamic acid; flufenamic acid; intravenous immune globulin; zileuton; azaribine; mycophenolic acid (RS-61443); tacrolimus (FK-506); sirolimus (rapamycin); amiprilose (therafectin); cladribine (2-chlorodeoxyadenosine); methotrexate; bcl-2 inhibitors (see Bruncko, M. et al. (2007) J. Med. Chem. 50(4): 641-662); antivirals and immune-modulating agents, small molecule inhibitor of KDR, small molecule inhibitor of Tie-2; methotrexate; prednisone; celecoxib; folic acid; hydroxychloroquine sulfate; rofecoxib; etanercept; infliximonoclonal antibody; leflunomide; naproxen; valdecoxib; sulfasalazine; methylprednisolone; ibuprofen; meloxicam; methylprednisolone acetate; gold sodium thiomalate; aspirin; azathioprine; triamcinolone acetonide; propxyphene napsylate/apap; folate; nabumetone; diclofenac; piroxicam; etodolac; diclofenac sodium; oxaprozin; oxycodone hcl; hydrocodone bitartrate/apap; diclofenac sodium/misoprostol; fentanyl; anakinra, human recombinant; tramadol hcl; salsalate; sulindac; cyanocobalamin/fa/pyridoxine; acetaminophen; alendronate sodium; prednisolone; morphine sulfate; lidocaine hydrochloride; indomethacin; glucosamine sulfate/chondroitin; cyclosporine; amitriptyline hydrochloride; sulfadiazine; oxycodone hcl/acetaminophen; olopatadine hcl; misoprostol; naproxen sodium; omeprazole; mycophenolate mofetil; cyclophosphamide; rituximonoclonal antibody; IL-1 TRAP; MRA; CTLA4-IG; IL-18 BP; IL-12/23; anti-IL 18; anti-IL 15; BIRB-796; SC10-469; VX-702; AMG-548; VX-740; Roflumilast; IC-485; CDC-801; mesopram, albuterol, salmeterol/fluticasone, montelukast sodium, fluticasone propionate, budesonide, prednisone, salmeterol xinafoate, levalbuterol hcl, albuterol sulfate/ipratropium, prednisolone sodium phosphate, triamcinolone acetonide, beclomethasone dipropionate, ipratropium bromide, azithromycin, pirbuterol acetate, prednisolone, theophylline anhydrous, methylprednisolone sodium succinate, clarithromycin, zafirlukast, formoterol fumarate, influenza virus vaccine, methylprednisolone, amoxicillin trihydrate, flunisolide, allergy injection, cromolyn sodium, fexofenadine hydrochloride, flunisolide/menthol, amoxicillin/clavulanate, levofloxacin, inhaler assist device, guaifenesin, dexamethasone sodium phosphate, moxifloxacin hcl, doxycycline hyclate, guaifenesin/d-methorphan, p-ephedrine/cod/chlorphenir, gatifloxacin, cetirizine hydrochloride, mometasone furoate, salmeterol xinafoate, benzonatate, cephalexin, pe/hydrocodone/chlorphenir, cetirizine hcl/pseudoephed, phenylephrine/cod/promethazine, codeine/promethazine, cefprozil, dexamethasone, guaifenesin/pseudoephedrine, chlorpheniramine/hydrocodone, nedocromil sodium, terbutaline sulfate, epinephrine, methylprednisolone, metaproterenol sulfate, aspirin, nitroglycerin, metoprolol tartrate, enoxaparin sodium, heparin sodium, clopidogrel bisulfate, carvedilol, atenolol, morphine sulfate, metoprolol succinate, warfarin sodium, lisinopril, isosorbide mononitrate, digoxin, furosemide, simvastatin, ramipril, tenecteplase, enalapril maleate, torsemide, retavase, losartan potassium, quinapril hcl/mag carb, bumetanide, alteplase, enalaprilat, amiodarone hydrochloride, tirofiban hcl m-hydrate, diltiazem hydrochloride, captopril, irbesartan, valsartan, propranolol hydrochloride, fosinopril sodium, lidocaine hydrochloride, eptifibatide, cefazolin sodium, atropine sulfate, aminocaproic acid, spironolactone, interferon, sotalol hydrochloride, potassium chloride, docusate sodium, dobutamine hcl, alprazolam, pravastatin sodium, atorvastatin calcium, midazolam hydrochloride, meperidine hydrochloride, isosorbide dinitrate, epinephrine, dopamine hydrochloride, bivalirudin, rosuvastatin, ezetimibe/simvastatin, avasimibe, and cariporide.

[0671] In some aspects, the additional therapeutic agent is an iRNA agent targeting a C5 gene, such as described in U.S. Pat. No. 9,249,415, U.S. Provisional Patent Application Nos. 62/174,933, filed on Jun. 12, 2015, 62/263,066, filed on Dec. 4, 2015, the entire contents of each of which are hereby incorporated herein by reference.

[0672] In other aspects, the additional therapeutic agent is an anti-complement component C5 antibody, or antigen-binding fragment thereof (e.g., eculizumab). Eculizumab is a humanized monoclonal IgG2/4, kappa light chain antibody that specifically binds complement component C5 with high affinity and inhibits cleavage of C5 to C5a and C5b, thereby inhibiting the generation of the terminal complement complex C5b-9. Eculizumab is described in U.S. Pat. No. 6,355,245, the entire contents of which are incorporated herein by reference.

[0673] In yet other aspects, the additional therapeutic is a MASP2 monoclonal antibody. In one embodiment, the MASP2 monoclonal antibody is Narsoplimab (OMS721), a human antibody.

[0674] The present invention also provides kits for performing any of the methods of the invention. Such kits include one or more dsRNA agent(s) and instructions for use, e.g., instructions for administering a prophylactically or therapeutically effective amount of a dsRNA agent(s). The dsRNA agent may be in a vial or a pre-filled syringe. The kits may optionally further comprise means for administering the dsRNA agent (e.g., an injection device, such as a pre-filled syringe), or means for measuring the inhibition of MASP2 (e.g., means for measuring the inhibition of MASP2 mRNA, MASP2 protein, and/or MASP2 activity). Such means for measuring the inhibition of MASP2 may comprise a means for obtaining a sample from a subject, such as, e.g., a plasma sample. The kits of the invention may optionally further comprise means for determining the therapeutically effective or prophylactically effective amount.

[0675] This invention is further illustrated by the following examples which should not be construed as limiting. The entire contents of all references, patents and published patent applications cited throughout this application, as well as the informal Sequence Listing and Figures, are hereby incorporated herein by reference.

Source of Reagents

[0676] Where the source of a reagent is not specifically given herein, such reagent can be obtained from any supplier of reagents for molecular biology at a quality/purity standard for application in molecular biology.

siRNA Design

[0677] siRNAs targeting the human MASP2 gene (human NCBI refseqIDs NM_006610.3, NM_006610.4 and NM_139208.2; NCBI GeneID: 10747) were designed using custom R and Python scripts. The human NM_006610.3 REFSEQ mRNA has a length of 2471 bases; NM_006610.4 REFSEQ mRNA, has a length of 2455 bases; and NM_139208.2 REFSEQ mRNA has a length of 749 bases.

[0678] siRNAs targeting the mouse MASP2 gene (mouse: NCBI refseqID NM_001003893.2) were designed using custom R and Python scripts. The mouse NM_001003893.2 REFSEQ mRNA, has a length of 3061 bases.

[0679] Detailed lists of the unmodified MASP2 sense and antisense strand nucleotide sequences are shown in Tables 2, 4, and 6. Detailed lists of the modified MASP2 sense and antisense strand nucleotide sequences are shown in Tables 3, 5, and 7.

[0680] It is to be understood that, throughout the application, a duplex name without a decimal is equivalent to a duplex name with a decimal which merely references the batch number of the duplex. For example, AD-68438 is equivalent to AD-68438.1.

siRNA Synthesis

[0681] siRNAs were synthesized and annealed using routine methods known in the art.

[0682] Briefly, siRNA sequences were synthesized at 1 μmol scale on a Mermade 192 synthesizer (BioAutomation) using the solid support mediated phosphoramidite chemistry. The solid support was controlled pore glass (500 A) loaded with custom GalNAc ligand or universal solid support (AM biochemical). Ancillary synthesis reagents, 2′-F and 2′-O-Methyl RNA and deoxy phosphoramidites were obtained from Thermo-Fisher (Milwaukee, WI) and Hongene (China). 2′F 2′-O-Methyl, GNA (glycol nucleic acids), 5′phosphate and other modifications were introduced using the corresponding phosphoramidites. Synthesis of 3′ GalNAc conjugated single strands was performed on a GalNAc modified CPG support. Custom CPG universal solid support was used for the synthesis of antisense single strands. Coupling time for all phosphoramidites (100 mM in acetonitrile) was 5 minutes employing 5-Ethylthio-1H-tetrazole (ETT) as activator (0.6 M in acetonitrile). Phosphorothioate linkages were generated using a 50 mM solution of 3-((Dimethylamino-methylidene) amino)-3H-1,2,4-dithiazole-3-thione (DDTT, obtained from Chemgenes (Wilmington, MA, USA)) in anhydrous acetonitrile/pyridine (1:1 v/v). Oxidation time was 3 minutes. All sequences were synthesized with final removal of the DMT group (“DMT off”).

[0683] Upon completion of the solid phase synthesis, oligoribonucleotides were cleaved from the solid support and deprotected in sealed 96 deep well plates using 200 μL Aqueous Methylamine reagents at 60° C. for 20 minutes. For sequences containing 2′ ribo residues (2′-OH) that are protected with a tert-butyl dimethyl silyl (TBDMS) group, a second step deprotection was performed using TEA·3HF (triethylamine trihydro fluoride) reagent. To the methylamine deprotection solution, 200 μL of dimethyl sulfoxide (DMSO) and 300 μl TEA·3HF reagent was added and the solution was incubated for additional 20 minutes at 60° C. At the end of cleavage and deprotection step, the synthesis plate was allowed to come to room temperature and was precipitated by addition of 1 mL of acetontile: ethanol mixture (9:1). The plates were cooled at −80° C. for 2 hours, supernatant decanted carefully with the aid of a multi-channel pipette. The oligonucleotide pellet was re-suspended in 20 mM NaOAc buffer and were desalted using a 5 mL HiTrap size exclusion column (GE Healthcare) on an AKTA Purifier System equipped with an A905 autosampler and a Frac 950 fraction collector. Desalted samples were collected in 96-well plates. Samples from each sequence were analyzed by LC-MS to confirm the identity, UV (260 nm) for quantification and a selected set of samples by IEX chromatography to determine purity.

[0684] Annealing of single strands was performed on a Tecan liquid handling robot. Equimolar mixture of sense and antisense single strands were combined and annealed in 96-well plates. After combining the complementary single strands, the 96-well plate was sealed tightly and heated in an oven at 100° C. for 10 minutes and allowed to come slowly to room temperature over a period 2-3 hours. The concentration of each duplex was normalized to 10 μM in 1×PBS and then submitted for in vitro screening assays.

Cell Culture and 384-Well Transfections

[0685] Hep3b cells (ATCC, Manassas, VA) were grown to near confluence at 37° C. in an atmosphere of 5% CO₂ in Eagle's Minimum Essential Medium (Gibco) supplemented with 10% FBS (ATCC) before being released from the plate by trypsinization. For mouse and cynomolgus monkey cross reactive duplexes, primary mouse hepatocytes (PMH) or primary cynomolgus monkey hepatocytes (PCH) were freshly isolated less than 1 hour prior to transfections and grown in primary hepatocyte media. For Hep3B, PMH and PCH, transfection was carried out by adding 14.8 μL of Opti-MEM plus 0.2 μl of Lipofectamine RNAiMax per well (Invitrogen, Carlsbad Calif. cat #13778-150) to 5 μL of each siRNA duplex to an individual well in a 96-well plate. The mixture was then incubated at room temperature for 15 minutes. Eighty μL of complete growth media without antibiotic containing ~2×10⁴ Hep3B cells, PMH or PCH were then added to the siRNA mixture. Cells were incubated for 24 hours prior to RNA purification. Single dose experiments were performed at 10 nM and 0.1 nM final duplex concentration.

Total RNA Isolation Using DYNABEADS mRNA Isolation Kit (Invitrogen™, Part #: 610-12)

[0686] Cells were lysed in 75 μL of Lysis/Binding Buffer containing 3 μL of beads per well and mixed for 10 minutes on an electrostatic shaker. The washing steps were automated on a Biotek EL406, using a magnetic plate support. Beads were washed (in 90 L), once in Buffer A, once in Buffer B, and twice in Buffer E, with aspiration steps in between. Following a final aspiration, complete 10 μL RT mixture was added to each well, as described below.

cDNA Synthesis Using ABI High Capacity cDNA Reverse Transcription Kit (Applied Biosystems, Foster City, CA, Cat #4368813)

[0687] A master mix of 1 μL 10× Buffer, 0.4 μL 25× dNTPs, 1 μL Random primers, 0.5 μL Reverse Transcriptase, 0.5 μL RNase inhibitor and 6.6 μL of H₂O per reaction were added per well. Plates were sealed, agitated for 10 minutes on an electrostatic shaker, and then incubated at 37° C. for 2 hours. Following this, the plates were agitated at 80° C. for 8 minutes.

Real Time PCR

[0688] Two microliter (μL) of cDNA were added to a master mix containing 0.5 μL of human GAPDH TaqMan Probe (4326317E) or 0.5 μL Mouse GAPDH TaqMan Probe (4352339E), 0.5 μL human MASP2 probe (Hs00198244_m1 (long isoform-specific) or Hs00373722_m1 (shared with both long and short isoforms)) or 0.5 μL mouse MASP2 probe (Mm01263692_m1 (long-isoform specific) or Mm00521962_g1 (both isoforms)), 2 μL nuclease-free water and 5 μL Lightcycler 480 probe master mix (Roche Cat #04887301001) per well in a 384 well plates (Roche cat #04887301001). Real time PCR was done in a LightCycler480 Real Time PCR system (Roche). Each duplex was tested at least two times and data were normalized to cells transfected with a non-targeting control siRNA. To calculate relative fold change, real time data were analyzed using the ΔΔCt method and normalized to assays performed with cells transfected with a non-targeting control siRNA.

[0689] The results of the screening of the dsRNA agents listed in Tables 2 and 3 in PCH cells are shown in Table 8. The results of the screening of the dsRNA agents listed in Tables 2 and 3 in PMH cells are shown in Table 9. Tables 8 and 9 indicate the cross reactivity of the MASP2 probe with human (h), cynomolgus monkey (c), mouse (m) and rat (r) MASP2. Tables 8 and 9 also indicate whether the MASP2 probe recognizes only the long isoform (long-specific) of MASP2 or recognizes both the long and short MASP2 isoforms (shared). The results of the screening of the dsRNA agents listed in Tables 4 and 5 in Hep3B cells are shown in Table 10.

[0690]

TABLE 1
Abbreviations of nucleotide monomers used in nucleic acid sequence representation. It will be
understood that these monomers, when present in an oligonucleotide, are mutually linked by 5′-3′-
phosphodiester bonds; and it is understood that when the nucleotide contains a 2′-fluoro modification,
then the fluoro replaces the hydroxy at that position of the parent nucleotide (i.e., it is a 2′-deoxy-2′-
fluoronucleotide).
Abbreviation	Nucleotide(s)
A	Adenosine-3′-phosphate
Ab	beta-L-adenosine-3′-phosphate
Abs	beta-L-adenosine-3′-phosphorothioate
Af	2′-fluoroadenosine-3′-phosphate
Afs	2′-fluoroadenosine-3′-phosphorothioate
As	adenosine-3′-phosphorothioate
C	cytidine-3′-phosphate
Cb	beta-L-cytidine-3′-phosphate
Cbs	beta-L-cytidine-3′-phosphorothioate
Cf	2′-fluorocytidine-3′-phosphate
Cfs	2′-fluorocytidine-3′-phosphorothioate
Cs	cytidine-3′-phosphorothioate
G	guanosine-3′-phosphate
Gb	beta-L-guanosine-3′-phosphate
Gbs	beta-L-guanosine-3′-phosphorothioate
Gf	2′-fluoroguanosine-3′-phosphate
Gfs	2′-fluoroguanosine-3′-phosphorothioate
Gs	guanosine-3′-phosphorothioate
T	5′-methyluridine-3′-phosphate
Tf	2′-fluoro-5-methyluridine-3′-phosphate
Tfs	2′-fluoro-5-methyluridine-3′-phosphorothioate
Ts	5-methyluridine-3′-phosphorothioate
U	Uridine-3′-phosphate
Uf	2′-fluorouridine-3′-phosphate
Ufs	2′-fluorouridine-3′-phosphorothioate
Us	uridine-3′-phosphorothioate
N	any nucleotide, modified or unmodified
a	2′-O-methyladenosine-3′-phosphate
as	2′-O-methyladenosine-3′-phosphorothioate
c	2′-O-methylcytidine-3′-phosphate
cs	2′-O-methylcytidine-3′-phosphorothioate
g	2′-O-methylguanosine-3′-phosphate
gs	2′-O-methylguanosine-3′-phosphorothioate
t	2′-O-methyl-5-methyluridine-3′-phosphate
ts	2′-O-methyl-5-methyluridine-3′-phosphorothioate
u	2′-O-methyluridine-3′-phosphate
us	2′-O-methyluridine-3′-phosphorothioate
s	phosphorothioate linkage
L96	N-[tris(GalNAc-alkyl)-amido-dodecanoyl)]-4-hydroxyprolinol
	[Hyp-(GalNAc-alkyl)3]
(Agn)	Adenosine-glycol nucleic acid (GNA)
(Cgn)	Cytidine-glycol nucleic acid (GNA)
(Ggn)	Guanosine-glycol nucleic acid (GNA)
(Tgn)	Thymidine-glycol nucleic acid (GNA) S-Isomer
P	Phosphate
VP	Vinyl-phosphonate
dA	2′-deoxyadenosine-3′-phosphate
dAs	2′-deoxyadenosine-3′-phosphorothioate
dC	2′-deoxycytidine-3′-phosphate
dCs	2′-deoxycytidine-3′-phosphorothioate
dG	2′-deoxyguanosine-3′-phosphate
dGs	2′-deoxyguanosine-3′-phosphorothioate
dT	2′-deoxythymidine-3′-phosphate
dTs	2′-deoxythymidine-3′-phosphorothioate
dU	2′-deoxyuridine
dUs	2′-deoxyuridine-3′-phosphorothioate

[0691]

TABLE 2
Unmodified Sense and Antisense Strand Sequences of MASP2 dsRNA Agents
	Sense				Antisense
Duplex	Sequence			Range in	Sequence		Range in
Name	5′ to 3′	SEQ ID NO:	Source	Source	5′ to 3′	SEQ ID NO:	Source
AD-	GUGUGUGAGGC	24	NM_006610.3	1263-1283	UAAUCCAUCAGC	70	1261-1283
68438.1	UGAUGGAUUA				CUCACACACAU
AD-	CACCUACAAAG	25	NM_006610.3	1190-1210	UGAAUCACAGCU	71	1188-1210
68439.1	CUGUGAUUCA				UUGUAGGUGGU
AD-	ACCUACAAAGC	26	NM_006610.3	1191-1211	UUGAAUCACAGC	72	1189-1211
68440.1	UGUGAUUCAA				UUUGUAGGUGG
AD-	AGAAAGAUGGA	27	NM_006610.3	1078-1098	UGUCCCAAGAUC	73	1076-1098
68441.1	UCUUGGGACA				CAUCUUUCUGA
AD-	AGGCUGAUGGA	28	NM_006610.3	1270-1290	UCGUCCAGAAUC	74	1268-1290
68442.1	UUCUGGACGA				CAUCAGCCUCA
AD-	GACCACACAGG	29	NM_006610.3	885-905	UAUCUUCCAGCC	75	883-905
68443.1	CUGGAAGAUA				UGUGUGGUCUC
AD-	CGACUUUCUCA	30	NM_006610.3	761-781	UUUUGAAUCUUG	76	759-781
68444.1	AGAUUCAAAA				AGAAAGUCGUA
AD-	GUAAAUAUGUG	31	NM_006610.3	1255-1275	UAGCCUCACACA	77	1253-1275
68445.1	UGUGAGGCUA				CAUAUUUACCA
AD-	GAUUCUGGACG	32	NM_006610.3	1279-1299	UUUUGGAGCUCG	78	1277-1299
68446.1	AGCUCCAAAA				UCCAGAAUCCA
AD-	AAAGCUGUGAU	33	NM_006610.3	1197-1217	UCUGUACUGAAU	79	1195-1217
68447.1	UCAGUACAGA				CACAGCUUUGU
AD-	CUGGCUAUGAG	34	NM_006610.3	1021-1041	UUUGCAGAAGCU	80	1019-1041
68448.1	CUUCUGCAAA				CAUAGCCAGUC
AD-	UCUGGACUUUG	35	NM_006610.3	704-724	AAGGACUCCACA	81	702-724
68449.1	UGGAGUCCUU				AAGUCCAGAAU
AD-	AGGUGGUUUGU	36	NM_006610.3	1968-1988	UAUUCCUCCCAC	82	1966-1988
68450.1	GGGAGGAAUA				AAACCACCUCU
AD-	UGGAUUCUGGA	37	NM_006610.3	1277-1297	UUGGAGCUCGUC	83	1275-1297
68451.1	CGAGCUCCAA				CAGAAUCCAUC
AD-	UGAUUCAGUAC	38	NM_006610.3	1204-1224	UUUCACAGCUGU	84	1202-1224
68452.1	AGCUGUGAAA				ACUGAAUCACA
AD-	CUACAAAGCUG	39	NM_006610.3	1193-1213	UACUGAAUCACA	85	1191-1213
68453.1	UGAUUCAGUA				GCUUUGUAGGU
AD-	CUGUGAUUCAG	40	NM_006610.3	1201-1221	UACAGCUGUACU	86	1199-1221
68454.1	UACAGCUGUA				GAAUCACAGCU
AD-	CUGGUGAUUUU	41	NM_006610.3	1390-1410	UUUGCCAAGGAA	87	1388-1410
68455.1	CCUUGGCAAA				AAUCACCAGGU
AD-	GCUGAUGGAUU	42	NM_006610.3	1272-1292	UCUCGUCCAGAA	88	1270-1292
68456.1	CUGGACGAGA				UCCAUCAGCCU
AD-	UCUGGACGAGC	43	NM_006610.3	1282-1302	UUCCUUUGGAGC	89	1280-1302
68457.1	UCCAAAGGAA				UCGUCCAGAAU
AD-	CCACGUUUCAC	44	NM_006610.3	959-979	UCUUGCACAGGU	90	957-979
68458.1	CUGUGCAAGA				GAAACGUGGCC
AD-	AGCUGUGAUUC	45	NM_006610.3	1199-1219	UAGCUGUACUGA	91	1197-1219
68459.1	AGUACAGCUA				AUCACAGCUUU
AD-	UCCAGCCUGGA	46	NM_139208.2	363-383	UAAGGUAAUGUC	92	361-383
68460.1	CAUUACCUUA				CAGGCUGGAGC
AD-	UACGUCCUGCA	47	NM_139208.2	543-563	UUUGUUACGGUG	93	541-563
68461.1	CCGUAACAAA				CAGGACGUAGC
AD-	AGCCGAGGACA	48	NM_139208.2	437-457	UACUCGUCAAUG	94	435-457
68462.1	UUGACGAGUA				UCCUCGGCUGC
AD-	AAGUGGCCUGA	49	NM_139208.2	93-113	UAACACAGGUUC	95	91-113
68463.1	ACCUGUGUUA				AGGCCACUUCG
AD-	CUCUGCGAGUA	50	NM_139208.2	243-263	UACGAAGUCGUA	96	241-263
68464.1	CGACUUCGUA				CUCGCAGAGGU
AD-	GAGUAUGCCAA	51	NM_139208.2	144-164	UUCCUGGUCAUU	97	142-164
68465.1	UGACCAGGAA				GGCAUACUCCC
AD-	UGGGCCCGAAG	52	NM_139208.2	85-105	UUUCAGGCCACU	98	83-105
68466.1	UGGCCUGAAA				UCGGGCCCAAG
AD-	CUUCGUCAAGC	53	NM_139208.2	257-277	UCCGAGCUCAGC	99	255-277
68467.1	UGAGCUCGGA				UUGACGAAGUC
AD-	GCAGCCGAGGA	54	NM_139208.2	435-455	UUCGUCAAUGUC	100	433-455
68468.1	CAUUGACGAA				CUCGGCUGCAU
AD-	UGGGCUCCAGC	55	NM_139208.2	358-378	UAAUGUCCAGGC	101	356-378
68469.1	CUGGACAUUA				UGGAGCCCAGC
AD-	GCACACCAUGA	56	NM_139208.2	26-46	UUCAGCAGCCUC	102	24-46
68470.1	GGCUGCUGAA				AUGGUGUGCCC
AD-	CACUUUCUACU	57	NM_139208.2	344-364	UAGCCCAGCGAG	103	342-364
68471.1	CGCUGGGCUA				UAGAAAGUGUC
AD-	GAGUAUGACUU	58	NM_	259-279	UAACUUGACAAA	104	257-279
68472.1	UGUCAAGUUA		001003893.2		GUCAUACUCGC
AD-	CAGGGUUUGAG	59	NM_	425-445	UAUAGAAGGCCU	105	423-445
68473.1	GCCUUCUAUA		001003893.2		CAAACCCUGUG
AD-	UCCCUUGUGAC	60	NM_	491-511	UGCAAUAAUGGU	106	489-511
68474.1	CAUUAUUGCA		001003893.2		CACAAGGGACU
AD-	CGCUGCGAGUA	61	NM_	253-273	UACAAAGUCAUA	107	251-273
68475.1	UGACUUUGUA		001003893.2		CUCGCAGCGGU
AD-	GUAUGACUUUG	62	NM_	261-281	UUCAACUUGACA	108	259-281
68476.1	UCAAGUUGAA		001003893.2		AAGUCAUACUC
AD-	UCUGCUGUGGA	63	NM_	66-86	UCCACCAAACUC	109	64-86
68477.1	GUUUGGUGGA		001003893.2		CACAGCAGACC
AD-	GCACCUGGCAA	64	NM_	340-360	UAAGGUGUCAUU	110	338-360
68478.1	UGACACCUUA		001003893.2		GCCAGGUGCCU
AD-	AGCGGAGGAUG	65	NM_	447-467	UAUUCAUCCACA	111	445-467
68479.1	UGGAUGAAUA		001003893.2		UCCUCCGCUGC
AD-	CCCAGCCUAAA	66	NM_	373-393	UAAGGUGACCUU	112	371-393
68480.1	GGUCACCUUA		001003893.2		UAGGCUGGGAC
AD-	CACGUGCUCAG	67	NM_	576-596	UAACAAAGGGCU	113	574-596
68481.1	CCCUUUGUUA		001003893.2		GAGCACGUGUG
AD-	ACUGAGCAGGC	68	NM_	331-351	AUUGCCAGGUGC	114	329-351
68482.1	ACCUGGCAAU		001003893.2		CUGCUCAGUGU
AD-	ACCGCUGCGAG	69	NM_	251-271	UAAAGUCAUACU	115	249-271
68483.1	UAUGACUUUA		001003893.2		CGCAGCGGUAA

[0692]

TABLE 3
Modified Sense and Antisense Strand Sequences of MASP2 dsRNA Agents
Duplex	Sense Sequence	SEQ	Antisense	SEQ	mRNA Target	SEQ
ID	5′ to 3′	ID NO:	Sequence 5′ to 3′	ID NO:	Sequence 5′ to 3′	ID NO:
AD-	gsusguguGfaGfGf	116	usAfsaucCfaUfCfag	162	AUGUGUGUGAGGCUGAU	208
68438.1	CfugauggauuaL96		ccUfcAfcacacsasu		GGAUUC
AD-	csasccuaCfaAfAf	117	usGfsaauCfaCfAfgc	163	ACCACCUACAAAGCUGU	209
68439.1	GfcugugauucaL96		uuUfgUfaggugsgsu		GAUUCA
AD-	ascscuacAfaAfGf	118	usUfsgaaUfcAfCfag	164	CCACCUACAAAGCUGUG	210
68440.1	CfugugauucaaL96		cuUfuGfuaggusgsg		AUUCAG
AD-	asgsaaagAfuGfGf	119	usGfsuccCfaAfGfau	165	UCAGAAAGAUGGAUCUU	211
68441.1	AfucuugggacaL96		ccAfuCfuuucusgsa		GGGACC
AD-	asgsgcugAfuGfGf	120	usCfsgucCfaGfAfau	166	UGAGGCUGAUGGAUUCU	212
68442.1	AfuucuggacgaL96		ccAfuCfagccuscsa		GGACGA
AD-	gsasccacAfcAfGf	121	usAfsucuUfcCfAfgc	167	GAGACCACACAGGCUGG	213
68443.1	GfcuggaagauaL96		cuGfuGfuggucsusc		AAGAUC
AD-	csgsacuuUfcUfCf	122	usUfsuugAfaUfCfuu	168	UACGACUUUCUCAAGAU	214
68444.1	AfagauucaaaaL96		gaGfaAfagucgsusa		UCAAAC
AD-	gsusaaauAfuGfUf	123	usAfsgccUfcAfCfac	169	UGGUAAAUAUGUGUGUG	215
68445.1	GfugugaggcuaL96		acAfuAfuuuacscsa		AGGCUG
AD-	gsasuucuGfgAfCf	124	usUfsuugGfaGfCfuc	170	UGGAUUCUGGACGAGCU	216
68446.1	GfagcuccaaaaL96		guCfcAfgaaucscsa		CCAAAG
AD-	asasagcuGfuGfAf	125	usCfsuguAfcUfGfaa	171	ACAAAGCUGUGAUUCAG	217
68447.1	UfucaguacagaL96		ucAfcAfgcuuusgsu		UACAGC
AD-	csusggcuAfuGfAf	126	usUfsugcAfgAfAfgc	172	GACUGGCUAUGAGCUUC	218
68448.1	GfcuucugcaaaL96		ucAfuAfgccagsusc		UGCAAG
AD-	uscsuggaCfuUfUf	127	asAfsggaCfuCfCfac	173	AUUCUGGACUUUGUGGA	219
68449.1	GfuggaguccuuL96		aaAfgUfccagasasu		GUCCUU
AD-	asgsguggUfuUfGf	128	usAfsuucCfuCfCfca	174	AGAGGUGGUUUGUGGGA	220
68450.1	UfgggaggaauaL96		caAfaCfcaccuscsu		GGAAUA
AD-	usgsgauuCfuGfGf	129	usUfsggaGfcUfCfgu	175	GAUGGAUUCUGGACGAG	221
68451.1	AfcgagcuccaaL96		ccAfgAfauccasusc		CUCCAA
AD-	usgsauucAfgUfAf	130	usUfsucaCfaGfCfug	176	UGUGAUUCAGUACAGCU	222
68452.1	CfagcugugaaaL96		uaCfuGfaaucascsa		GUGAAG
AD-	csusacaaAfgCfUf	131	usAfscugAfaUfCfac	177	ACCUACAAAGCUGUGAU	223
68453.1	GfugauucaguaL96		agCfuUfuguagsgsu		UCAGUA
AD-	csusgugaUfuCfAf	132	usAfscagCfuGfUfac	178	AGCUGUGAUUCAGUACA	224
68454.1	GfuacagcuguaL96		ugAfaUfcacagscsu		GCUGUG
AD-	csusggugAfuUfUf	133	usUfsugcCfaAfGfga	179	ACCUGGUGAUUUUCCUU	225
68455.1	UfccuuggcaaaL96		aaAfuCfaccagsgsu		GGCAAG
AD-	gscsugauGfgAfUf	134	usCfsucgUfcCfAfga	180	AGGCUGAUGGAUUCUGG	226
68456.1	UfcuggacgagaL96		auCfcAfucagcscsu		ACGAGC
AD-	uscsuggaCfgAfGf	135	usUfsccuUfuGfGfag	181	AUUCUGGACGAGCUCCA	227
68457.1	CfuccaaaggaaL96		cuCfgUfccagasasu		AAGGAG
AD-	cscsacguUfuCfAf	136	usCfsuugCfaCfAfgg	182	GGCCACGUUUCACCUGU	228
68458.1	CfcugugcaagaL96		ugAfaAfcguggscsc		GCAAGC
AD-	asgscuguGfaUfUf	137	usAfsgcuGfuAfCfug	183	AAAGCUGUGAUUCAGUA	229
68459.1	CfaguacagcuaL96		aaUfcAfcagcususu		CAGCUG
AD-	uscscagcCfuGfGf	138	usAfsaggUfaAfUfgu	184	GCUCCAGCCUGGACAUU	230
68460.1	AfcauuaccuuaL96		ccAfgGfcuggasgsc		ACCUUC
AD-	usascgucCfuGfCf	139	usUfsuguUfaCfGfgu	185	GCUACGUCCUGCACCGU	231
68461.1	AfccguaacaaaL96		gcAfgGfacguasgsc		AACAAG
AD-	asgsccgaGfgAfCf	140	usAfscucGfuCfAfau	186	GCAGCCGAGGACAUUGA	232
68462.1	AfuugacgaguaL96		guCfcUfcggcusgsc		CGAGUG
AD-	asasguggCfcUfGf	141	usAfsacaCfaGfGfuu	187	CGAAGUGGCCUGAACCU	233
68463.1	AfaccuguguuaL96		caGfgCfcacuuscsg		GUGUUC
AD-	csuscugcGfaGfUf	142	usAfscgaAfgUfCfgu	188	ACCUCUGCGAGUACGAC	234
68464.1	AfcgacuucguaL96		acUfcGfcagagsgsu		UUCGUC
AD-	gsasguauGfcCfAf	143	usUfsccuGfgUfCfau	189	GGGAGUAUGCCAAUGAC	235
68465.1	AfugaccaggaaL96		ugGfcAfuacucscsc		CAGGAG
AD-	usgsggccCfgAfAf	144	usUfsucaGfgCfCfac	190	CUUGGGCCCGAAGUGGC	236
68466.1	GfuggccugaaaL96		uuCfgGfgcccasasg		CUGAAC
AD-	csusucguCfaAfGf	145	usCfscgaGfcUfCfag	191	GACUUCGUCAAGCUGAG	237
68467.1	CfugagcucggaL96		cuUfgAfcgaagsusc		CUCGGG
AD-	gscsagccGfaGfGf	146	usUfscguCfaAfUfgu	192	AUGCAGCCGAGGACAUU	238
68468.1	AfcauugacgaaL96		ccUfcGfgcugcsasu		GACGAG
AD-	usgsggcuCfcAfGf	147	usAfsaugUfcCfAfgg	193	GCUGGGCUCCAGCCUGG	239
68469.1	CfcuggacauuaL96		cuGfgAfgcccasgsc		ACAUUA
AD-	gscsacacCfaUfGf	148	usUfscagCfaGfCfcu	194	GGGCACACCAUGAGGCU	240
68470.1	AfggcugcugaaL96		caUfgGfugugcscsc		GCUGAC
AD-	csascuuuCfuAfCf	149	usAfsgccCfaGfCfga	195	GACACUUUCUACUCGCU	241
68471.1	UfcgcugggcuaL96		guAfgAfaagugsusc		GGGCUC
AD-	gsasguauGfaCfUf	150	usAfsacuUfgAfCfaa	196	GCGAGUAUGACUUUGUC	242
68472.1	UfugucaaguuaL96		agUfcAfuacucsgsc		AAGUUG
AD-	csasggguUfuGfAf	151	usAfsuagAfaGfGfcc	197	CACAGGGUUUGAGGCCU	243
68473.1	GfgccuucuauaL96		ucAfaAfcccugsusg		UCUAUG
AD-	uscsccuuGfuGfAf	152	usGfscaaUfaAfUfgg	198	AGUCCCUUGUGACCAUU	244
68474.1	CfcauuauugcaL96		ucAfcAfagggascsu		AUUGCC
AD-	csgscugcGfaGfUf	153	usAfscaaAfgUfCfau	199	ACCGCUGCGAGUAUGAC	245
68475.1	AfugacuuuguaL96		acUfcGfcagcgsgsu		UUUGUC
AD-	gsusaugaCfuUfUf	154	usUfscaaCfuUfGfac	200	GAGUAUGACUUUGUCAA	246
68476.1	GfucaaguugaaL96		aaAfgUfcauacsusc		GUUGAG
AD-	uscsugcuGfuGfGf	155	usCfscacCfaAfAfcu	201	GGUCUGCUGUGGAGUUU	247
68477.1	AfguuugguggaL96		ccAfcAfgcagascsc		GGUGGC
AD-	gscsaccuGfgCfAf	156	usAfsaggUfgUfCfau	202	AGGCACCUGGCAAUGAC	248
68478.1	AfugacaccuuaL96		ugCfcAfggugcscsu		ACCUUC
AD-	asgscggaGfgAfUf	157	usAfsuucAfuCfCfac	203	GCAGCGGAGGAUGUGGA	249
68479.1	GfuggaugaauaL96		auCfcUfccgcusgsc		UGAAUG
AD-	cscscagcCfuAfAf	158	usAfsaggUfgAfCfcu	204	GUCCCAGCCUAAAGGUC	250
68480.1	AfggucaccuuaL96		uuAfgGfcugggsasc		ACCUUC
AD-	csascgugCfuCfAf	159	usAfsacaAfaGfGfgc	205	CACACGUGCUCAGCCCU	251
68481.1	GfcccuuuguuaL96		ugAfgCfacgugsusg		UUGUUC
AD-	ascsugagCfaGfGf	160	asUfsugcCfaGfGfug	206	ACACUGAGCAGGCACCU	252
68482.1	CfaccuggcaauL96		ccUfgCfucagusgsu		GGCAAU
AD-	ascscgcuGfcGfAf	161	usAfsaagUfcAfUfac	207	UUACCGCUGCGAGUAUG	253
68483.1	GfuaugacuuuaL96		ucGfcAfgcggusasa		ACUUUG

[0693]

TABLE 4
Unmodified Sense and Antisense Strand Sequences of MASP2 dsRNA Agents
	Sense			Antisense
Duplex	Sequence		Range in	Sequence		Range in
Name	5′ to 3′	SEQ ID NO:	NM_006610.3	5′ to 3′	SEQ ID NO:	NM_006610.3
AD-	GACAAUGACAU	254	1620-1640	AAUCAGUGCUAU	345	1618-1640
156804.1	AGCACUGAUU			GUCAUUGUCAA
AD-	AUUGUUGACCA	255	1806-1826	ACAUUUUUGAUG	346	1804-1826
156950.1	UCAAAAAUGU			GUCAACAAUCG
AD-	AUCUAAUGUAU	256	1783-1803	UUAUGUCGACAU	347	1781-1803
156927.1	GUCGACAUAA			ACAUUAGAUUU
AD-	AAUGACAUAGC	257	1623-1643	UUUAAUCAGUGC	348	1621-1643
156807.1	ACUGAUUAAA			UAUGUCAUUGU
AD-	UUUUCCUUGGC	258	1397-1417	AUCAGGACUUGCC	349	1395-1417
156581.1	AAGUCCUGAU			AAGGAAAAUC
AD-	AAUCUAAUGUA	259	1782-1802	UAUGUCGACAUA	350	1780-1802
156926.1	UGUCGACAUA			CAUUAGAUUUC
AD-	CUAGAAAUCUA	260	1777-1797	UGACAUACAUUA	351	1775-1797
156921.1	AUGUAUGUCA			GAUUUCUAGCA
AD-	UGAGCAAAAAC	261	1490-1510	UAUGCAUCAUGU	352	1488-1510
156674.1	AUGAUGCAUA			UUUUGCUCAUA
AD-	CUUUAUGAGGA	262	1712-1732	AUGUCAUCUGUCC	353	1710-1732
156889.1	CAGAUGACAU			UCAUAAAGGA
AD-	CACGCCUAUUU	263	1676-1696	UUUGGCAGACAA	354	1674-1696
156853.1	GUCUGCCAAA			AUAGGCGUGAU
AD-	ACAGGAGGGCG	264	1353-1373	UCCAUAUAUACGC	355	1351-1373
156538.1	UAUAUAUGGA			CCUCCUGUUG
AD-	ACAUGGCAGUU	265	2189-2209	UUGGAGCAACAA	356	2187-2209
157227.1	GUUGCUCCAA			CUGCCAUGUCC
AD-	CAGGUGCACUU	266	1438-1458	UGUCAUAUAAAA	357	1436-1458
156622.1	UUAUAUGACA			GUGCACCUGCU
AD-	AAAAUGUACUG	267	1820-1840	UCAUAUGCAGCA	358	1818-1840
156964.1	CUGCAUAUGA			GUACAUUUUUG
AD-	CAAUAGCAACA	268	1664-1684	AUAGGCGUGAUG	359	1662-1684
156841.1	UCACGCCUAU			UUGCUAUUGAU
AD-	AAACCUGGUGA	269	1386-1406	UCAAGGAAAAUC	360	1384-1406
156571.1	UUUUCCUUGA			ACCAGGUUUUG
AD-	AAUAGCAACAU	270	1665-1685	AAUAGGCGUGAU	361	1663-1685
156842.1	CACGCCUAUU			GUUGCUAUUGA
AD-	UCUGGACGAGC	271	1282-1302	UUCCUUUGGAGC	362	1280-1302
68457.2	UCCAAAGGAA			UCGUCCAGAAU
AD-	GUGUAACUGCU	272	1864-1884	AAAGCAUGUUAG	363	1862-1884
156990.1	AACAUGCUUU			CAGUUACACUU
AD-	CUAAUGUAUGU	273	1785-1805	UGGUAUGUCGAC	364	1783-1805
156929.1	CGACAUACCA			AUACAUUAGAU
AD-	UGUAAUGUCAC	274	2333-2353	AAUUUGAGCAGU	365	2331-2353
157334.1	UGCUCAAAUU			GACAUUACACU
AD-	AGAAAUCUAAU	275	1779-1799	UUCGACAUACAU	366	1777-1799
156923.1	GUAUGUCGAA			UAGAUUUCUAG
AD-	CAACAGGAGGG	276	1351-1371	UAUAUAUACGCCC	367	1349-1371
156536.1	CGUAUAUAUA			UCCUGUUGUG
AD-	ACAACAGGAGG	277	1350-1370	AUAUAUACGCCCU	368	1348-1370
156535.1	GCGUAUAUAU			CCUGUUGUGC
AD-	GCUUCUGCAAG	278	1031-1051	UGCAAGUGACCU	369	1029-1051
156255.1	GUCACUUGCA			UGCAGAAGCUC
AD-	GUUAUUAACUA	279	2046-2066	UCAGGGAAUAUA	370	2044-2066
157093.1	UAUUCCCUGA			GUUAAUAACUU
AD-	CUUUGACAAUG	280	1616-1636	AGUGCUAUGUCA	371	1614-1636
156800.1	ACAUAGCACU			UUGUCAAAGCC
AD-	AAGCCAGUCUC	281	2372-2392	AGUAUGAAAAGA	372	2370-2392
157371.1	UUUUCAUACU			GACUGGCUUUU
AD-	UAGCAACAUCA	282	1667-1687	UAAAUAGGCGUG	373	1665-1687
156844.1	CGCCUAUUUA			AUGUUGCUAUU
AD-	UCACGCCUAUU	283	1675-1695	UUGGCAGACAAA	374	1673-1695
156852.1	UGUCUGCCAA			UAGGCGUGAUG
AD-	GAAAUCUAAUG	284	1780-1800	UGUCGACAUACA	375	1778-1800
156924.1	UAUGUCGACA			UUAGAUUUCUA
AD-	AAGACUAUCAC	285	1541-1561	UUAUAAUGAGGU	376	1539-1561
156725.1	CUCAUUAUAA			GAUAGUCUUUU
AD-	CCUCAUUAUAC	286	1551-1571	UCAGGCUUGUGU	377	1549-1571
156735.1	ACAAGCCUGA			AUAAUGAGGUG
AD-	UUCCUUGGCAA	287	1399-1419	AUAUCAGGACUU	378	1397-1419
156583.1	GUCCUGAUAU			GCCAAGGAAAA
AD-	GAAGCUGAAUC	288	1701-1721	UCUCAUAAAGGA	379	1699-1721
156878.1	CUUUAUGAGA			UUCAGCUUCUU
AD-	UAUGAGGACAG	289	1715-1735	UCAAUGUCAUCU	380	1713-1735
156892.1	AUGACAUUGA			GUCCUCAUAAA
AD-	AGAAGCUGAAU	290	1700-1720	UUCAUAAAGGAU	381	1698-1720
156877.1	CCUUUAUGAA			UCAGCUUCUUU
AD-	AGCAACAUCAC	291	1668-1688	ACAAAUAGGCGU	382	1666-1688
156845.1	GCCUAUUUGU			GAUGUUGCUAU
AD-	UAUAUGGAGGG	292	1366-1386	UUGCCUUUUGCCC	383	1364-1386
156551.1	CAAAAGGCAA			UCCAUAUAUA
AD-	AUGGCAGUUGU	293	2191-2211	UGGUGGAGCAAC	384	2189-2211
157229.1	UGCUCCACCA			AACUGCCAUGU
AD-	GCCAGUCUCUU	294	2374-2394	UCAGUAUGAAAA	385	2372-2394
157373.1	UUCAUACUGA			GAGACUGGCUU
AD-	UCCUUGGCAAG	295	1400-1420	AAUAUCAGGACU	386	1398-1420
156584.1	UCCUGAUAUU			UGCCAAGGAAA
AD-	CCAGUCUGUGA	296	1314-1334	ACAAACAGGCUCA	387	1312-1334
156499.1	GCCUGUUUGU			CAGACUGGGA
AD-	AAAUGUACUGC	297	1821-1841	UUCAUAUGCAGC	388	1819-1841
156965.1	UGCAUAUGAA			AGUACAUUUUU
AD-	UUGUUGACCAU	298	1807-1827	UACAUUUUUGAU	389	1805-1827
156951.1	CAAAAAUGUA			GGUCAACAAUC
AD-	CAAAGUUGUAA	299	1652-1672	UUGCUAUUGAUU	390	1650-1672
156829.1	UCAAUAGCAA			ACAACUUUGUU
AD-	GAAAUGCCUGU	300	2129-2149	UAAGGUCUUCAC	391	2127-2149
157167.1	GAAGACCUUA			AGGCAUUUCUA
AD-	UAGAAAUCUAA	301	1778-1798	UCGACAUACAUU	392	1776-1798
156922.1	UGUAUGUCGA			AGAUUUCUAGC
AD-	AAGCUGAAUCC	302	1702-1722	UCCUCAUAAAGG	393	1700-1722
156879.1	UUUAUGAGGA			AUUCAGCUUCU
AD-	UGGCAAGUCCU	303	1404-1424	ACCUAAUAUCAG	394	1402-1424
156588.1	GAUAUUAGGU			GACUUGCCAAG
AD-	GAAGGUUAUAC	304	1593-1613	AGCAUCAUGAGU	395	1591-1613
156777.1	UCAUGAUGCU			AUAACCUUCAU
AD-	CUUGCUAGAAA	305	1773-1793	AUACAUUAGAUU	396	1771-1793
156917.1	UCUAAUGUAU			UCUAGCAAGAA
AD-	AGCCAGUCUCU	306	2373-2393	UAGUAUGAAAAG	397	2371-2393
157372.1	UUUCAUACUA			AGACUGGCUUU
AD-	CUAUCACCUCA	307	1545-1565	UUGUGUAUAAUG	398	1543-1565
156729.1	UUAUACACAA			AGGUGAUAGUC
AD-	GACCAUCAAAA	308	1812-1832	AGCAGUACAUUU	399	1810-1832
156956.1	AUGUACUGCU			UUGAUGGUCAA
AD-	ACGCCUAUUUG	309	1677-1697	UCUUGGCAGACA	400	1675-1697
156854.1	UCUGCCAAGA			AAUAGGCGUGA
AD-	GGGCGUAUAUA	310	1359-1379	UUGCCCUCCAUAU	401	1357-1379
156544.1	UGGAGGGCAA			AUACGCCCUC
AD-	UCAAUAGCAAC	311	1663-1683	UAGGCGUGAUGU	402	1661-1683
156840.1	AUCACGCCUA			UGCUAUUGAUU
AD-	AUAUAUGGAGG	312	1365-1385	UGCCUUUUGCCCU	403	1363-1385
156550.1	GCAAAAGGCA			CCAUAUAUAC
AD-	GCAGUUGUUGC	313	2194-2214	UUUGGGUGGAGC	404	2192-2214
157232.1	UCCACCCAAA			AACAACUGCCA
AD-	GUGAUUUUCCU	314	1393-1413	UGACUUGCCAAG	405	1391-1413
156577.1	UGGCAAGUCA			GAAAAUCACCA
AD-	ACAAUGACAUA	315	1621-1641	UAAUCAGUGCUA	406	1619-1641
156805.1	GCACUGAUUA			UGUCAUUGUCA
AD-	CAUCACGCCUA	316	1673-1693	UGCAGACAAAUA	407	1671-1693
156850.1	UUUGUCUGCA			GGCGUGAUGUU
AD-	AAGGUUAUACU	317	1594-1614	UAGCAUCAUGAG	408	1592-1614
156778.1	CAUGAUGCUA			UAUAACCUUCA
AD-	AACCUGGUGAU	318	1387-1407	UCCAAGGAAAAU	409	1385-1407
156572.1	UUUCCUUGGA			CACCAGGUUUU
AD-	AGACUAUCACC	319	1542-1562	UGUAUAAUGAGG	410	1540-1562
156726.1	UCAUUAUACA			UGAUAGUCUUU
AD-	GGUUUGUGGGA	320	1972-1992	ACACUAUUCCUCC	411	1970-1992
157059.1	GGAAUAGUGU			CACAAACCAC
AD-	ACCUCAUUAUA	321	1550-1570	UAGGCUUGUGUA	412	1548-1570
156734.1	CACAAGCCUA			UAAUGAGGUGA
AD-	GAGCCUGUUUG	322	1323-1343	UGAUAGUCCACA	413	1321-1343
156508.1	UGGACUAUCA			AACAGGCUCAC
AD-	GAGGGCGUAUA	323	1357-1377	UCCCUCCAUAUAU	414	1355-1377
156542.1	UAUGGAGGGA			ACGCCCUCCU
AD-	GGCGUAUAUAU	324	1360-1380	UUUGCCCUCCAUA	415	1358-1380
156545.1	GGAGGGCAAA			UAUACGCCCU
AD-	CCUUUAUGAGG	325	1711-1731	UGUCAUCUGUCCU	416	1709-1731
156888.1	ACAGAUGACA			CAUAAAGGAU
AD-	GCUGCAUAUGA	326	1830-1850	UGGUGGCUUUUC	417	1828-1850
156974.1	AAAGCCACCA			AUAUGCAGCAG
AD-	AAAUCUAAUGU	327	1781-1801	AUGUCGACAUAC	418	1779-1801
156925.1	AUGUCGACAU			AUUAGAUUUCU
AD-	GGCAAGUCCUG	328	1405-1425	UACCUAAUAUCA	419	1403-1425
156589.1	AUAUUAGGUA			GGACUUGCCAA
AD-	AUUUUUAGAAA	329	2122-2142	UUCACAGGCAUU	420	2120-2142
157160.1	UGCCUGUGAA			UCUAAAAAUGA
AD-	GCAGGUGCACU	330	1437-1457	UUCAUAUAAAAG	421	1435-1457
156621.1	UUUAUAUGAA			UGCACCUGCUG
AD-	GUUUGUGGGAG	331	1973-1993	UACACUAUUCCUC	422	1971-1993
157060.1	GAAUAGUGUA			CCACAAACCA
AD-	UCUCUUUUCAU	332	2379-2399	AACAGCCAGUAU	423	2377-2399
157378.1	ACUGGCUGUU			GAAAAGAGACU
AD-	UUUCCUUGGCA	333	1398-1418	UAUCAGGACUUG	424	1396-1418
156582.1	AGUCCUGAUA			CCAAGGAAAAU
AD-	GCAACAUCACG	334	1669-1689	UACAAAUAGGCG	425	1667-1689
156846.1	CCUAUUUGUA			UGAUGUUGCUA
AD-	AGGAGGGCGUA	335	1355-1375	UCUCCAUAUAUAC	426	1353-1375
156540.1	UAUAUGGAGA			GCCCUCCUGU
AD-	AGUUGUUGCUC	336	2196-2216	UUUUUGGGUGGA	427	2194-2216
157234.1	CACCCAAAAA			GCAACAACUGC
AD-	UGUGAGCCUGU	337	1320-1340	UAGUCCACAAACA	428	1318-1340
156505.1	UUGUGGACUA			GGCUCACAGA
AD-	CAAGUCCUGAU	338	1407-1427	UCCACCUAAUAUC	429	1405-1427
156591.1	AUUAGGUGGA			AGGACUUGCC
AD-	AAGUGUAACUG	339	1862-1882	AGCAUGUUAGCA	430	1860-1882
156988.1	CUAACAUGCU			GUUACACUUCC
AD-	AUAGCAACAUC	340	1666-1686	AAAUAGGCGUGA	431	1664-1686
156843.1	ACGCCUAUUU			UGUUGCUAUUG
AD-	CAGGAGGGCGU	341	1354-1374	UUCCAUAUAUAC	432	1352-1374
156539.1	AUAUAUGGAA			GCCCUCCUGUU
AD-	UUUGUGGGAGG	342	1974-1994	UGACACUAUUCCU	433	1972-1994
157061.1	AAUAGUGUCA			CCCACAAACC
AD-	AUCAAUAGCAA	343	1662-1682	AGGCGUGAUGUU	434	1660-1682
156839.1	CAUCACGCCU			GCUAUUGAUUA
AD-	AAAGUUGUAAU	344	1653-1673	UUUGCUAUUGAU	435	1651-1673
156830.1	CAAUAGCAAA			UACAACUUUGU

[0694]

TABLE 5
Modified Sense and Antisense Strand Sequences of MASP2 dsRNA Agents
		SEQ		SEQ	mRNA Target	SEQ
Duplex	Sense Sequence	ID	Antisense	ID	Sequence	ID
ID	5’ to 3’	NO:	Sequence 5’ to 3’	NO:	5’ to 3’	NO:
AD-	gsascaauGfaCfAf	436	asAfsucaGfuGfCfu	527	UUGACAAUGACAU	618
156804.	UfagcacugauuL96		augUfcAfuugucsas		AGCACUGAUU
1			a
AD-	asusuguuGfaCfCf	437	asCfsauuUfuUfGfa	528	CGAUUGUUGACCA	619
156950.	AfucaaaaauguL96		uggUfcAfacaauscsg		UCAAAAAUGU
1
AD-	asuscuaaUfgUfAf	438	usUfsaugUfcGfAfc	529	AAAUCUAAUGUAU	620
156927.	UfgucgacauaaL96		auaCfaUfuagaususu		GUCGACAUAC
1
AD-	asasugacAfuAfGf	439	usUfsuaaUfcAfGfu	530	ACAAUGACAUAGC	621
156807.	CfacugauuaaaL96		gcuAfuGfucauusgs		ACUGAUUAAA
1			u
AD-	ususuuccUfuGfGf	440	asUfscagGfaCfUfu	531	GAUUUUCCUUGGC	622
156581.	CfaaguccugauL96		gccAfaGfgaaaasusc		AAGUCCUGAU
1
AD-	asasucuaAfuGfUf	441	usAfsuguCfgAfCfa	532	GAAAUCUAAUGUA	623
156926.	AfugucgacauaL96		uacAfuUfagauusus		UGUCGACAUA
1			c
AD-	csusagaaAfuCfUf	442	usGfsacaUfaCfAfu	533	UGCUAGAAAUCUA	624
156921.	AfauguaugucaL96		uagAfuUfucuagscs		AUGUAUGUCG
1			a
AD-	usgsagcaAfaAfAf	443	usAfsugcAfuCfAfu	534	UAUGAGCAAAAAC	625
156674.	CfaugaugcauaL96		guuUfuUfgcucasus		AUGAUGCAUC
1			a
AD-	csusuuauGfaGfGf	444	asUfsgucAfuCfUfg	535	UCCUUUAUGAGGA	626
156889.	AfcagaugacauL96		uccUfcAfuaaagsgsa		CAGAUGACAU
1
AD-	csascgccUfaUfUf	445	usUfsuggCfaGfAfc	536	AUCACGCCUAUUU	627
156853.	UfgucugccaaaL96		aaaUfaGfgcgugsasu		GUCUGCCAAG
1
AD-	ascsaggaGfgGfCf	446	usCfscauAfuAfUfa	537	CAACAGGAGGGCG	628
156538.	GfuauauauggaL96		cgcCfcUfccugususg		UAUAUAUGGA
1
AD-	ascsauggCfaGfUf	447	usUfsggaGfcAfAfc	538	GGACAUGGCAGUU	629
157227.	UfguugcuccaaL96		aacUfgCfcauguscsc		GUUGCUCCAC
1
AD-	csasggugCfaCfUf	448	usGfsucaUfaUfAfa	539	AGCAGGUGCACUU	630
156622.	UfuuauaugacaL96		aagUfgCfaccugscsu		UUAUAUGACA
1
AD-	asasaaugUfaCfUf	449	usCfsauaUfgCfAfg	540	CAAAAAUGUACUG	631
156964.	GfcugcauaugaL96		cagUfaCfauuuusus		CUGCAUAUGA
1			g
AD-	csasauagCfaAfCf	450	asUfsaggCfgUfGfa	541	AUCAAUAGCAACA	632
156841.	AfucacgccuauL96		uguUfgCfuauugsas		UCACGCCUAU
1			u
AD-	asasaccuGfgUfGf	451	usCfsaagGfaAfAfa	542	CAAAACCUGGUGA	633
156571.	AfuuuuccuugaL96		ucaCfcAfgguuusus		UUUUCCUUGG
1			g
AD-	asasuagcAfaCfAf	452	asAfsuagGfcGfUfg	543	UCAAUAGCAACAU	634
156842.	UfcacgccuauuL96		augUfuGfcuauusgs		CACGCCUAUU
1			a
AD-	uscsuggaCfgAfGf	453	usUfsccuUfuGfGfa	544	AUUCUGGACGAGC	635
68457.2	CfuccaaaggaaL96		gcuCfgUfccagasasu		UCCAAAGGAG
AD-	gsusguaaCfuGfCf	454	asAfsagcAfuGfUfu	545	AAGUGUAACUGCU	636
156990.	UfaacaugcuuuL96		agcAfgUfuacacsusu		AACAUGCUUU
1
AD-	csusaaugUfaUfGf	455	usGfsguaUfgUfCfg	546	AUCUAAUGUAUGU	637
156929.	UfcgacauaccaL96		acaUfaCfauuagsasu		CGACAUACCG
1
AD-	usgsuaauGfuCfAf	456	asAfsuuuGfaGfCfa	547	AGUGUAAUGUCAC	638
157334.	CfugcucaaauuL96		gugAfcAfuuacascs		UGCUCAAAUU
1			u
AD-	asgsaaauCfuAfAf	457	usUfscgaCfaUfAfc	548	CUAGAAAUCUAAU	639
156923.	UfguaugucgaaL96		auuAfgAfuuucusas		GUAUGUCGAC
1			g
AD-	csasacagGfaGfGf	458	usAfsuauAfuAfCfg	549	CACAACAGGAGGG	640
156536.	GfcguauauauaL96		cccUfcCfuguugsus		CGUAUAUAUG
1			g
AD-	ascsaacaGfgAfGf	459	asUfsauaUfaCfGfc	550	GCACAACAGGAGG	641
156535.	GfgcguauauauL96		ccuCfcUfguugusgs		GCGUAUAUAU
1			c
AD-	gscsuucuGfcAfAf	460	usGfscaaGfuGfAfc	551	GAGCUUCUGCAAG	642
156255.	GfgucacuugcaL96		cuuGfcAfgaagcsusc		GUCACUUGCC
1
AD-	gsusuauuAfaCfUf	461	usCfsaggGfaAfUfa	552	AAGUUAUUAACUA	643
157093.	AfuauucccugaL96		uagUfuAfauaacsus		UAUUCCCUGG
1			u
AD-	csusuugaCfaAfUf	462	asGfsugcUfaUfGfu	553	GGCUUUGACAAUG	644
156800.	GfacauagcacuL96		cauUfgUfcaaagscsc		ACAUAGCACU
1
AD-	asasgccaGfuCfUf	463	asGfsuauGfaAfAfa	554	AAAAGCCAGUCUC	645
157371.	CfuuuucauacuL96		gagAfcUfggcuusus		UUUUCAUACU
1			u
AD-	usasgcaaCfaUfCf	464	usAfsaauAfgGfCfg	555	AAUAGCAACAUCA	646
156844.	AfcgccuauuuaL96		ugaUfgUfugcuasus		CGCCUAUUUG
1			u
AD-	uscsacgcCfuAfUf	465	usUfsggcAfgAfCfa	556	CAUCACGCCUAUU	647
156852.	UfugucugccaaL96		aauAfgGfcgugasus		UGUCUGCCAA
1			g
AD-	gsasaaucUfaAfUf	466	usGfsucgAfcAfUfa	557	UAGAAAUCUAAUG	648
156924.	GfuaugucgacaL96		cauUfaGfauuucsusa		UAUGUCGACA
1
AD-	asasgacuAfuCfAf	467	usUfsauaAfuGfAfg	558	AAAAGACUAUCAC	649
156725.	CfcucauuauaaL96		gugAfuAfgucuusus		CUCAUUAUAC
1			u
AD-	cscsucauUfaUfAf	468	usCfsaggCfuUfGfu	559	CACCUCAUUAUAC	650
156735.	CfacaagccugaL96		guaUfaAfugaggsus		ACAAGCCUGG
1			g
AD-	ususccuuGfgCfAf	469	asUfsaucAfgGfAfc	560	UUUUCCUUGGCAA	651
156583.	AfguccugauauL96		uugCfcAfaggaasasa		GUCCUGAUAU
1
AD-	gsasagcuGfaAfUf	470	usCfsucaUfaAfAfg	561	AAGAAGCUGAAUC	652
156878.	CfcuuuaugagaL96		gauUfcAfgcuucsus		CUUUAUGAGG
1			u
AD-	usasugagGfaCfAf	471	usCfsaauGfuCfAfu	562	UUUAUGAGGACAG	653
156892.	GfaugacauugaL96		cugUfcCfucauasasa		AUGACAUUGG
1
AD-	asgsaagcUfgAfAf	472	usUfscauAfaAfGfg	563	AAAGAAGCUGAAU	654
156877.	UfccuuuaugaaL96		auuCfaGfcuucusus		CCUUUAUGAG
1			u
AD-	asgscaacAfuCfAf	473	asCfsaaaUfaGfGfc	564	AUAGCAACAUCAC	655
156845.	CfgccuauuuguL96		gugAfuGfuugcusas		GCCUAUUUGU
1			u
AD-	usasuaugGfaGfGf	474	usUfsgccUfuUfUfg	565	UAUAUAUGGAGGG	656
156551.	GfcaaaaggcaaL96		cccUfcCfauauasusa		CAAAAGGCAA
1
AD-	asusggcaGfuUfGf	475	usGfsgugGfaGfCfa	566	ACAUGGCAGUUGU	657
157229.	UfugcuccaccaL96		acaAfcUfgccausgsu		UGCUCCACCC
1
AD-	gscscaguCfuCfUf	476	usCfsaguAfuGfAfa	567	AAGCCAGUCUCUU	658
157373.	UfuucauacugaL96		aagAfgAfcuggcsus		UUCAUACUGG
1			u
AD-	uscscuugGfcAfAf	477	asAfsuauCfaGfGfa	568	UUUCCUUGGCAAG	659
156584.	GfuccugauauuL96		cuuGfcCfaaggasasa		UCCUGAUAUU
1
AD-	cscsagucUfgUfGf	478	asCfsaaaCfaGfGfcu	569	UCCCAGUCUGUGA	660
156499.	AfgccuguuuguL96		caCfaGfacuggsgsa		GCCUGUUUGU
1
AD-	asasauguAfcUfGf	479	usUfscauAfuGfCfa	570	AAAAAUGUACUGC	661
156965.	CfugcauaugaaL96		gcaGfuAfcauuusus		UGCAUAUGAA
1			u
AD-	ususguugAfcCfAf	480	usAfscauUfuUfUfg	571	GAUUGUUGACCAU	662
156951.	UfcaaaaauguaL96		augGfuCfaacaasusc		CAAAAAUGUA
1
AD-	csasaaguUfgUfAf	481	usUfsgcuAfuUfGfa	572	AACAAAGUUGUAA	663
156829.	AfucaauagcaaL96		uuaCfaAfcuuugsus		UCAAUAGCAA
1			u
AD-	gsasaaugCfcUfGf	482	usAfsaggUfcUfUfc	573	UAGAAAUGCCUGU	664
157167.	UfgaagaccuuaL96		acaGfgCfauuucsusa		GAAGACCUUG
1
AD-	usasgaaaUfcUfAf	483	usCfsgacAfuAfCfa	574	GCUAGAAAUCUAA	665
156922.	AfuguaugucgaL96		uuaGfaUfuucuasgs		UGUAUGUCGA
1			c
AD-	asasgcugAfaUfCf	484	usCfscucAfuAfAfa	575	AGAAGCUGAAUCC	666
156879.	CfuuuaugaggaL96		ggaUfuCfagcuuscs		UUUAUGAGGA
1			u
AD-	usgsgcaaGfuCfCf	485	asCfscuaAfuAfUfc	576	CUUGGCAAGUCCU	667
156588.	UfgauauuagguL96		aggAfcUfugccasasg		GAUAUUAGGU
1
AD-	gsasagguUfaUfAf	486	asGfscauCfaUfGfa	577	AUGAAGGUUAUAC	668
156777.	CfucaugaugcuL96		guaUfaAfccuucsasu		UCAUGAUGCU
1
AD-	csusugcuAfgAfAf	487	asUfsacaUfuAfGfa	578	UUCUUGCUAGAAA	669
156917.	AfucuaauguauL96		uuuCfuAfgcaagsasa		UCUAAUGUAU
1
AD-	asgsccagUfcUfCf	488	usAfsguaUfgAfAfa	579	AAAGCCAGUCUCU	670
157372.	UfuuucauacuaL96		agaGfaCfuggcusus		UUUCAUACUG
1			u
AD-	csusaucaCfcUfCf	489	usUfsgugUfaUfAfa	580	GACUAUCACCUCA	671
156729.	AfuuauacacaaL96		ugaGfgUfgauagsus		UUAUACACAA
1			c
AD-	gsasccauCfaAfAf	490	asGfscagUfaCfAfu	581	UUGACCAUCAAAA	672
156956.	AfauguacugcuL96		uuuUfgAfuggucsas		AUGUACUGCU
1			a
AD-	ascsgccuAfuUfUf	491	usCfsuugGfcAfGfa	582	UCACGCCUAUUUG	673
156854.	GfucugccaagaL96		caaAfuAfggcgusgs		UCUGCCAAGA
1			a
AD-	gsgsgcguAfuAfUf	492	usUfsgccCfuCfCfa	583	GAGGGCGUAUAUA	674
156544.	AfuggagggcaaL96		uauAfuAfcgcccsusc		UGGAGGGCAA
1
AD-	uscsaauaGfcAfAf	493	usAfsggcGfuGfAfu	584	AAUCAAUAGCAAC	675
156840.	CfaucacgccuaL96		guuGfcUfauugasus		AUCACGCCUA
1			U
AD-	asusauauGfgAfGf	494	usGfsccuUfuUfGfc	585	GUAUAUAUGGAGG	676
156550.	GfgcaaaaggcaL96		ccuCfcAfuauausasc		GCAAAAGGCA
1
AD-	gscsaguuGfuUfGf	495	usUfsuggGfuGfGfa	586	UGGCAGUUGUUGC	677
157232.	CfuccacccaaaL96		gcaAfcAfacugcscsa		UCCACCCAAA
1
AD-	gsusgauuUfuCfCf	496	usGfsacuUfgCfCfa	587	UGGUGAUUUUCCU	678
156577.	UfuggcaagucaL96		aggAfaAfaucacscsa		UGGCAAGUCC
1
AD-	ascsaaugAfcAfUf	497	usAfsaucAfgUfGfc	588	UGACAAUGACAUA	679
156805.	AfgcacugauuaL96		uauGfuCfauuguscs		GCACUGAUUA
1			a
AD-	csasucacGfcCfUf	498	usGfscagAfcAfAfa	589	AACAUCACGCCUA	680
156850.	AfuuugucugcaL96		uagGfcGfugaugsus		UUUGUCUGCC
1			u
AD-	asasgguuAfuAfCf	499	usAfsgcaUfcAfUfg	590	UGAAGGUUAUACU	681
156778.	UfcaugaugcuaL96		aguAfuAfaccuuscsa		CAUGAUGCUG
1
AD-	asasccugGfuGfAf	500	usCfscaaGfgAfAfa	591	AAAACCUGGUGAU	682
156572.	UfuuuccuuggaL96		aucAfcCfagguusus		UUUCCUUGGC
1			u
AD-	asgsacuaUfcAfCf	501	usGfsuauAfaUfGfa	592	AAAGACUAUCACC	683
156726.	CfucauuauacaL96		gguGfaUfagucusus		UCAUUAUACA
1			u
AD-	gsgsuuugUfgGfGf	502	asCfsacuAfuUfCfc	593	GUGGUUUGUGGGA	684
157059.	AfggaauaguguL96		uccCfaCfaaaccsasc		GGAAUAGUGU
1
AD-	ascscucaUfuAfUf	503	usAfsggcUfuGfUfg	594	UCACCUCAUUAUA	685
156734.	AfcacaagccuaL96		uauAfaUfgaggusgs		CACAAGCCUG
1			a
AD-	gsasgccuGfuUfUf	504	usGfsauaGfuCfCfa	595	GUGAGCCUGUUUG	686
156508.	GfuggacuaucaL96		caaAfcAfggcucsasc		UGGACUAUCA
1
AD-	gsasgggcGfuAfUf	505	usCfsccuCfcAfUfa	596	AGGAGGGCGUAUA	687
156542.	AfuauggagggaL96		uauAfcGfcccucscsu		UAUGGAGGGC
1
AD-	gsgscguaUfaUfAf	506	usUfsugcCfcUfCfc	597	AGGGCGUAUAUAU	688
156545.	UfggagggcaaaL96		auaUfaUfacgccscsu		GGAGGGCAAA
1
AD-	cscsuuuaUfgAfGf	507	usGfsucaUfcUfGfu	598	AUCCUUUAUGAGG	689
156888.	GfacagaugacaL96		ccuCfaUfaaaggsasu		ACAGAUGACA
1
AD-	gscsugcaUfaUfGf	508	usGfsgugGfcUfUfu	599	CUGCUGCAUAUGA	690
156974.	AfaaagccaccaL96		ucaUfaUfgcagcsasg		AAAGCCACCC
1
AD-	asasaucuAfaUfGf	509	asUfsgucGfaCfAfu	600	AGAAAUCUAAUGU	691
156925.	UfaugucgacauL96		acaUfuAfgauuuscs		AUGUCGACAU
1			u
AD-	gsgscaagUfcCfUf	510	usAfsccuAfaUfAfu	601	UUGGCAAGUCCUG	692
156589.	GfauauuagguaL96		cagGfaCfuugccsasa		AUAUUAGGUG
1
AD-	asusuuuuAfgAfAf	511	usUfscacAfgGfCfa	602	UCAUUUUUAGAAA	693
157160.	AfugccugugaaL96		uuuCfuAfaaaausgsa		UGCCUGUGAA
1
AD-	gscsagguGfcAfCf	512	usUfscauAfuAfAfa	603	CAGCAGGUGCACU	694
156621.	UfuuuauaugaaL96		aguGfcAfccugcsus		UUUAUAUGAC
1			g
AD-	gsusuuguGfgGfAf	513	usAfscacUfaUfUfc	604	UGGUUUGUGGGAG	695
157060.	GfgaauaguguaL96		cucCfcAfcaaacscsa		GAAUAGUGUC
1
AD-	uscsucuuUfuCfAf	514	asAfscagCfcAfGfu	605	AGUCUCUUUUCAU	696
157378.	UfacuggcuguuL96		augAfaAfagagascsu		ACUGGCUGUU
1
AD-	ususuccuUfgGfCf	515	usAfsucaGfgAfCfu	606	AUUUUCCUUGGCA	697
156582.	AfaguccugauaL96		ugcCfaAfggaaasasu		AGUCCUGAUA
1
AD-	gscsaacaUfcAfCf	516	usAfscaaAfuAfGfg	607	UAGCAACAUCACG	698
156846.	GfccuauuuguaL96		cguGfaUfguugcsus		CCUAUUUGUC
1			a
AD-	asgsgaggGfcGfUf	517	usCfsuccAfuAfUfa	608	ACAGGAGGGCGUA	699
156540.	AfuauauggagaL96		uacGfcCfcuccusgsu		UAUAUGGAGG
1
AD-	asgsuuguUfgCfUf	518	usUfsuuuGfgGfUfg	609	GCAGUUGUUGCUC	700
157234.	CfcacccaaaaaL96		gagCfaAfcaacusgsc		CACCCAAAAA
1
AD-	usgsugagCfcUfGf	519	usAfsgucCfaCfAfa	610	UCUGUGAGCCUGU	701
156505.	UfuuguggacuaL96		acaGfgCfucacasgsa		UUGUGGACUA
1
AD-	csasagucCfuGfAf	520	usCfscacCfuAfAfu	611	GGCAAGUCCUGAU	702
156591.	UfauuagguggaL96		aucAfgGfacuugscsc		AUUAGGUGGA
1
AD-	asasguguAfaCfUf	521	asGfscauGfuUfAfg	612	GGAAGUGUAACUG	703
156988.	GfcuaacaugcuL96		cagUfuAfcacuuscsc		CUAACAUGCU
1
AD-	asusagcaAfcAfUf	522	asAfsauaGfgCfGfu	613	CAAUAGCAACAUC	704
156843.	CfacgccuauuuL96		gauGfuUfgcuausus		ACGCCUAUUU
1			g
AD-	csasggagGfgCfGf	523	usUfsccaUfaUfAfu	614	AACAGGAGGGCGU	705
156539.	UfauauauggaaL96		acgCfcCfuccugsusu		AUAUAUGGAG
1
AD-	ususugugGfgAfGf	524	usGfsacaCfuAfUfu	615	GGUUUGUGGGAGG	706
157061.	GfaauagugucaL96		ccuCfcCfacaaascsc		AAUAGUGUCC
1
AD-	asuscaauAfgCfAf	525	asGfsgcgUfgAfUfg	616	UAAUCAAUAGCAA	707
156839.	AfcaucacgccuL96		uugCfuAfuugausus		CAUCACGCCU
1			a
AD-	asasaguuGfuAfAf	526	usUfsugcUfaUfUfg	617	ACAAAGUUGUAAU	708
156830.	UfcaauagcaaaL96		auuAfcAfacuuusgs		CAAUAGCAAC
1			u