WO2016077349A1 - HEPATITIS D VIRUS (HDV) iRNA COMPOSITIONS AND METHODS OF USE THEREOF - Google Patents
HEPATITIS D VIRUS (HDV) iRNA COMPOSITIONS AND METHODS OF USE THEREOF Download PDFInfo
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Definitions
- Hepatitis D virus or hepatitis delta virus is a human pathogen. Indeed HDV infection is highly endemic to several African countries, the Amazonian region, and the Middle East, while its prevalence is low in industrialized countries, except in the Mediterranean. However, the virus is defective and depends on obligatory helper functions provided by the hepatitis B virus (HBV) for transmission; indeed, HDV requires a simultaneous infection with HBV (co -infection) or superimposition on a pre-existing HBV infection (superinfection) to become infectious and thrive. In particular, HDV requires the HBV viral envelope containing the surface antigen of hepatitis B.
- HBV hepatitis B virus
- HDV is unique in human virology; it has a circular RNA genome of about 1,700 bases (see, e.g., Genbank Accession No. M21012.1 (GL329989)) and is therefore the smallest infectious agent in man, and is similar to viroids and satellite RNAs of plants.
- HDV replicates by a rolling circle mechanism unknown to animal cells, possesses a self-cleaving ribozyme and is transcribed by host RNA polymerases that normally accept only DNA templates (Ciancio and Rizzetto, Nat. Rev. 11:68-71, 2014).
- HDV is a circular, single stranded RNA virus that ranges from 1,672 (strain dFr45, Genbank accession number AX741144) to 1,697 nucleotides (dFr47, GenBank accession number AX741149).
- a unique open reading frame encodes the small and large hepatitis delta (sHD and IHD, respectively) antigens by way of an editing step in the hepatocyte nucleus.
- HDV-1 The genetic diversity of HDV is related to the geographic origin of the isolates and there are at least eight genotypes that are referred to as HDV-1 through HDV-8.
- HDV-2 (previously labeled HDV-IIa) is found in Japan, Taiwan, and Yakoutia, Russia
- HDV-4 (previously labeled HDV-IIb) in Taiwan and Japan
- HDV-3 which causes epidemics of severe and fulminant hepatitis in the Amazonian region (9); and HDV-5, HDV-6, HDV- 7, and HDV-8 in Africa (LeGal et al, Emerg. Infect. Dis. 12: 1447-1450, 2006).
- hepatitis B surface antigen (HBsAg) carriers throughout the globe were estimated to also be infected with HDV.
- Subjects infected with HBV are at increased risk of developing serious liver disease, such as chronic hepatitis, cirrhosis, liver failure and hepatocellular carcinoma (HCC) resulting in an estimated 600,000 deaths each year, HDV infection in such subjects (either co-infection or superinfection) can lead to severe acute and chronic forms of liver disease in association with HBV.
- both superinfection and coinfection with HDV results in more severe complications compared to infection with HBV alone.
- hepatitis D has the highest fatality rate of all the hepatitis infections, at 20%.
- the present invention provides iRNA compositions which effect the RNA- induced silencing complex (RlSC)-mediated cleavage of RNA transcripts of a Hepatitis D virus (HDV) gene.
- the HDV gene may be within a cell, e.g., a cell within a subject, such as a human.
- the present invention also provides methods and therapies for treating a subject having a disorder that would benefit from inhibiting or reducing the expression of an HDV gene, e.g., an HDV infection and/or an HDV-associated disease, such as hepatitis B virus infection, chronic hepatitis B infection (CHB), chronic Hepatitis D infection (CHD), cirrhosis, liver failure, and hepatocellular carcinoma (HCC), using iRNA compositions which effect the RNA-induced silencing complex (RlSC)-mediated cleavage of RNA transcripts of an HDV gene for inhibiting the expression of an HDV gene.
- an HDV infection and/or an HDV-associated disease such as hepatitis B virus infection, chronic hepatitis B infection (CHB), chronic Hepatitis D infection (CHD), cirrhosis, liver failure, and hepatocellular carcinoma (HCC)
- iRNA compositions which effect the RNA-induced silencing complex (RlSC)-mediated clea
- the methods for treatment of HDV can comprise agents and therapies useful for treating an HBV infection and/or an HBV-associated disorder, such as hepatitis D virus infection, chronic hepatitis D infection (CHD), chronic Hepatitis B infection (CHB), cirrhosis, liver failure, and hepatocellular carcinoma (HCC).
- HBV-associated disorder such as hepatitis D virus infection, chronic hepatitis D infection (CHD), chronic Hepatitis B infection (CHB), cirrhosis, liver failure, and hepatocellular carcinoma (HCC).
- the RNAi agents of the invention have been designed to target regions in the HDV genomes that are conserved across at least two, preferably 3, or more of the 8 serotypes of HDV (HDV- 1, HDV-2, HDV-3, HDV-4, HDV-5, HDV-6, HDV-7, and HDV-8).
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:29, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:30, wherein substantially all of the nucleotides of the sense strand and
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- HDV hepatitis D virus
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:31, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:32, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:33, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:34, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:35, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:36, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:37, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:38, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:39, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:40, wherein substantially all of the nucleotides of the sense strand and
- nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:41, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:42, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:43, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:44, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include 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 3 nucleotides from the nucleotide sequence of SEQ ID NO:2551, and the antisense strand comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO: 2552, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent
- the sense strand of the double stranded RNAi agents comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from nucleotides 1451-1484, nucleotides 1455-1480, nucleotides 1455- 1474, or nucleotides 1417-1443 of the nucleotide sequence of SEQ ID NO:2551.
- the one or more of the 3 nucleotide differences in the nucleotide sequence of the antisense strand is a nucleotide mismatch in the antisense strand.
- the one or more of the 3 nucleotide differences in the nucleotide sequence of the antisense strand is a nucleotide mismatch in the sense strand.
- all of the nucleotides of the sense strand and all of the nucleotides of the antisense strand are modified nucleotides.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from any one of the sequences listed in any one of Tables 11, 12, 31, and 32.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequences of the sense strand and the antisense strand sequences of any one of duplexes AD-70260.1, AD- 70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD- 70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD- 67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD- 70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, and AD-70275.1.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequences of the sense strand and the antisense strand sequences of any one of duplexes AD-70260.1, AD-70232.1, AD- 70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, and AD-70295.1.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- methyl modified nucleotide, a 2'-fluoro modified nucleotide, a 2'-deoxy-modified nucleotide, a locked nucleotide, an unlocked nucleotide, a conforaiationally restricted nucleotide, a constrained ethyl nucleotide, an abasic nucleotide, a 2'-amino-modified nucleotide, a 2'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleotide
- the at least one strand comprises a 3' overhang of at least 1 nucleotide. In another embodiment, the at least one strand comprises a 3' overhang of at least 2 nucleotides. In one embodiment, the double- stranded region is 15-30 nucleotide pairs in length. In another embodiment, the double- stranded region is 17-23 nucleotide pairs in length. In yet another embodiment, the double- stranded region is 17-25 nucleotide pairs in length. In one embodiment, the e double- stranded region is 23-27 nucleotide pairs in length. In another embodiment, the double- stranded region is 19-21 nucleotide pairs in length. In yet another embodiment, the double- stranded region is 21-23 nucleotide pairs in length.
- each strand has 15-30 nucleotides. In another embodiment, each strand has 19-30 nucleotides.
- the ligand is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N
- the RNAi agent is conjugated to the ligand as shown in the following schematic
- the RNAi agent is selected from the group of RNAi agents listed in any one of Tables 11, 12, 31, and 32.
- the agent is selected from the group consisting of AD- 70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD- 70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD- 67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD- 70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, and AD-70275.1.
- the present invention provides double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the double stranded RNAi agents include a sense strand and an antisense strand forming a double- stranded region, wherein the sense strand comprises any one of the sense sequences from Tables 11, 12, 31, and 32, and the antisense strand comprises any one of the antisense sequences from Tables 11, 12, 31, and 32, wherein substantially all of the nucleotides of the sense strand and substantially all of the nucleotides of the antisense strand are modified nucleotides, wherein the sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.
- the sense strand is selected from the group consisting of the sense strand sequences of AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1.
- the antisense strand is selected from the group consisting of the antisense strand sequences of AD-70260.1, AD-70232.1, AD- 70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD- 70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD- 67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD- 70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1.
- RNAi agents comprising sense and antisense nucleotide sequences which are at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over their entire length to the foregoing sense and antisense nucleotide sequences
- all of the nucleotides of the sense strand and all of the nucleotides of the antisense strand comprise a modification.
- At least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy-thymine (dT) nucleotide, a 2'-0-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'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'-hydroxly- modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl-modified nucleotide, a morph
- the 5'-phosphate mimic is a 5'-vinyl phosphate (5'-VP).
- the ligand is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N
- the RNAi agent is conjugated to the ligand as shown in the following schematic
- the present invention provides compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:29, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:30, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:31, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:32, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- HDV hepati
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:33, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:34, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- HDV hepati
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:35, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:36, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the
- the present invention provides compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:37, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:38, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:39, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:40, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- HDV hepati
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:41, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:42, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- HDV hepati
- the present invention provides compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:43, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:44, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- compositions comprising two or more double stranded RNAi agents for inhibiting expression of hepatitis D virus (HDV) in a cell, wherein each double stranded RNAi agent independently comprises a sense strand and an antisense strand forming a double- stranded region, wherein each of the sense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:2551, and each of the antisense strands independently comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequence of SEQ ID NO:2552, wherein substantially all of the nucleotides of each of the sense strands and substantially all of the nucleotides of each of the antisense strands are independently modified nucleotides, wherein each of the sense strands are independently conjugated to a ligand attached at the 3
- HDV hepati
- the sense strand of one or both of the first and second double stranded RNAi agents comprises at least 15 contiguous nucleotides from nucleotides 1451-1484, nucleotides 1455-1480, nucleotides 1455-1474, or nucleotides 1417-1443 of the nucleotide sequence of SEQ ID NO:2551.
- the one or more of the 3 nucleotide differences in the nucleotide sequence of the antisense strand is a nucleotide mismatch in the antisense strand. In another embodiment, the one or more of the 3 nucleotide differences in the nucleotide sequence of the antisense strand is a nucleotide mismatch in the sense strand.
- all of the nucleotides of the sense strand and all of the nucleotides of the antisense strand are modified nucleotides.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from any one of the sequences listed in any one of Tables 11, 12, 31, and 32.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequences of the sense strand and the antisense strand sequences of any one of duplexes AD-70260.1, AD- 70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD- 70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD- 67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD- 70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1.
- the sense strand and the antisense strand comprise a region of complementarity which comprises at least 15 contiguous nucleotides differing by no more than 3 nucleotides from the nucleotide sequences of the sense strand and antisense strand sequences of any one of duplexes AD-70260.1, AD- 70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD- 70278.1, or AD-70295.1.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- 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'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleotide, a
- the present invention provides compositions for inhibiting expression of hepatitis D virus (HDV) in a cell, the composition comprising (a) a first double- stranded RNAi agent comprising a first sense strand and a first antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the first sense strand and substantially all of the nucleotides of the first antisense strand are modified nucleotides, wherein the first sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker; and (b) a second double- stranded RNAi agent comprising a second sense strand and a second antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the second sense strand and substantially all of the nucleotides of the
- the first and second sense strands each independently comprise a sequence selected from the group consisting of any one of the sense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- first and second antisense strands each
- the first and second sense strand and/or all of the nucleotides of the first and second antisense strand comprise a modification.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- methyl modified nucleotide, a 2'-fluoro modified nucleotide, a 2'-deoxy-modified nucleotide, a locked nucleotide, an unlocked nucleotide, a conforaiationally restricted nucleotide, a constrained ethyl nucleotide, an abasic nucleotide, a 2'-amino-modified nucleotide, a 2'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleotide
- the first and second RNAi agent are selected from the group consisting of any one of the the sequences provided in Tables 11, 12, 31, and 32.
- the first and second RNAi agent are selected from the group consisting of any one of AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1.
- the first and second RNAi agent are selected from the group consisting of any one of AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, or AD-70295.1.
- the present invention provides a double stranded RNAi agent comprising any one of the RNAi agents listed in any one of Tables 11, 12, 31, 32,
- the agent is selected from the group consisting of AD- 70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD- 70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD- 67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD- 70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD- 70275.1.
- the agent is selected from the group consisting of AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, or AD-70295.1.
- the present invention also provides vectors and cells comprising the double stranded RNAi agent of the invention.
- the present invention provides pharmaceutical compositions comprising the double stranded RNAi agents of the invention, or the compositions of the invention, or the vectors of the invention.
- the double stranded RNAi agent is administered in an unbuffered solution.
- the unbuffered solution is saline or water.
- the double stranded RNAi agent is administered with a buffer solution.
- the buffer solution comprises acetate, citrate, prolamine, carbonate, or phosphate or any combination thereof.
- the buffer solution is phosphate buffered saline (PBS).
- PBS phosphate buffered saline
- the present invention provides methods of inhibiting Hepatitis D virus (HDV) gene expression in a cell.
- the methods include contacting the cell with the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention; and maintaining the cell produced for a time sufficient to obtain degradation of the mRNA transcript of an HDV gene, thereby inhibiting expression of the HDV gene in the cell.
- HDV Hepatitis D virus
- the present invention provides methods of inhibiting replication of a Hepatitis D virus (HDV) in a cell.
- the methods include contacting the cell with the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention; and maintaining the cell produced for a time sufficient to obtain degradation of the mRNA transcript of an HDV gene, thereby inhibiting replication of the HDV in the cell.
- HDV Hepatitis D virus
- the cell is within a subject. In one embodiment, the subject is a human.
- the subject suffers from an HDV-associated disease.
- HDV gene expression is inhibited by at least about 30%, about 40%, about 50%, about 60%, about 70%, about 80%, about 90%, about 95%, about 98% or about 100%.
- replication of HDV in the cell is inhibited by at least about 30%, about 40%, about 50%, about 60%, about 70%, about 80%, about 90%, about 95%, about 98% or about 100%.
- the present invention provides methods of reducing the level of Hepatitis D virus (HDV) DNA in a subject infected with HDV.
- the methods include administering to the subject a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention, thereby reducing the level of HDV DNA in the subject.
- a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention thereby reducing the level of HDV DNA in the subject.
- the present invention provides methods of reducing the level of a Hepatitis D virus (HDV) antigen in a subject infected with HDV.
- the methods include administering to the subject a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention, thereby reducing the level of the HDV antigen in the subject.
- the level of the large HDV antigen may be reduced, the level of the small HDV antigen may be reduced, or the level of both the large and the small HDV antigens may be reduced.
- the present invention provides methods of reducing the viral load of Hepatitis D virus (HDV) in a subject infected with HDV.
- the methods include administering to the subject a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention, thereby reducing the viral load of HDV in the subject.
- a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention thereby reducing the viral load of HDV in the subject.
- the present invention provides methods of treating a subject having a Hepatitis D virus (HDV) infection.
- the methods include administering to the subject a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention, thereby treating the subject.
- HDV Hepatitis D virus
- the present invention provides methods of treating a subject having a Hepatitis D virus (HDV)-associated disorder.
- the methods include administering to the subject a therapeutically effective amount of the double stranded RNAi agent of the invention, or the composition of the invention, or the vector of the invention, or the pharmaceutical composition of the invention, thereby treating the subject.
- HDV Hepatitis D virus
- the HDV-associated disorder is selected from the group consisting of hepatitis B virus infection, acute hepatits B, acute hepatitis D; acute fulminant hepatitis D; chronic hepatitis D; liver fibrosis; end-stage liver disease; hepatocellular carcinoma.
- the present invention provides methods of treating a subject having a Hepatitis D virus (HDV) infection.
- the methods include administering to the subject a therapeutically effective amount of a double stranded RNAi agent, wherein the double stranded RNAi agent comprises a sense strand and an antisense strand forming a double- stranded region, wherein the sense strand comprises any one sense sequences from any one of Tables 11, 12, 31, and 32 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequence), and the antisense strand comprises any one of the antisense sequences from any one of Tables 11, 12, 31, and 32 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the for
- the sense strand comprises a sequence selected from the group consisting of any one of the sense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- the antisense strand comprises a sequence selected from the group consisting of any one of the antisense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- all of the nucleotides of the sense strand and all of the nucleotides of the antisense strand comprise a modification.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- methyl modified nucleotide, a 2'-fluoro modified nucleotide, a 2'-deoxy-modified nucleotide, a locked nucleotide, an unlocked nucleotide, a conforaiationally restricted nucleotide, a constrained ethyl nucleotide, an abasic nucleotide, a 2' -amino-modified nucleotide, a 2'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleot
- the ligand is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N
- the RNAi agent is conjugated to the ligand as shown in the following schematic
- the HDV-associated disorder is selected from the group consisting of hepatitis B virus infection, acute hepatits B, acute hepatitis D; acute fulminant hepatitis D; chronic hepatitis D; liver fibrosis; end-stage liver disease; hepatocellular carcinoma.
- the present invention provides methods of treating a subject having a Hepatitis D virus (HDV) infection.
- the methods include administering to the subject a therapeutically effective amount of a composition for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the composition includes: (a) a first double- stranded RNAi agent comprising a first sense strand and a first antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the first sense strand and substantially all of the nucleotides of the first antisense strand are modified nucleotides, wherein the first sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker; and (b) a second double- stranded RNAi agent comprising a second sense strand and a second antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the second sense strand and substantially all of the nucleotides of the second antisense strand are modified nucleotides, wherein the second sense strand is conjugated to a ligand
- the first and second sense strands each independently comprise a sequence selected from the group consisting of any one of the sense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- first and second antisense strands each
- the present invention provides methods of treating a subject having a Hepatitis D virus (HDV)-associated disorder.
- the methods include administering to the subject a therapeutically effective amount of a composition for inhibiting expression of hepatitis D virus (HDV) in a cell.
- the composition includes: (a) a first double- stranded RNAi agent comprising a first sense strand and a first antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the first sense strand and substantially all of the nucleotides of the first antisense strand are modified nucleotides, wherein the first sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker; and (b) a second double- stranded RNAi agent comprising a second sense strand and a second antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the second sense strand and substantially all of the nucleotides of the second antisense strand are modified nucleotides, wherein the second sense strand is conjugated to a ligand
- the first and second sense strands each independently comprise a sequence selected from the group consisting of any one of the sense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- the first and second antisense strands each independently comprise a sequence
- all of the nucleotides of the first and second sense strand and all of the nucleotides of the first and second antisense strand comprise a modification.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- 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'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleotide, a
- the ligand is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N
- the RNAi agent is conjugated to the ligand as shown in the following schematic
- the subject is a human.
- the HDV-associated disorder is selected from the group consisting of hepatitis B virus infection, acute hepatits B, acute hepatitis D; acute fulminant hepatitis D; chronic hepatitis D; liver fibrosis; end-stage liver disease; hepatocellular carcinoma.
- the methods of the invention further comprise treatment of hepatitis B virus (HBV) in the subject.
- HBV hepatitis B virus
- Methods of treatment can include any methods of treatment known in the art.
- HBV is treated in the subject using one of more if the iRNA agents provided herein.
- the methods of the invention further include methods to modulate, preferably decrease the expression of PD-Ll.
- Compositions and methods to reduce the expression of PD-Ll are provided, for example, in PCT publication no. WO2011/127180, which is hereby incorporated by reference.
- the double stranded RNAi agent is administered at a dose of about 0.01 mg/kg to about 10 mg/kg or about 0.5 mg/kg to about 50 mg/kg.
- the double stranded RNAi agent is administered at a dose of about 10 mg/kg to about 30 mg/kg. In another embodiment, the double stranded RNAi agent is administered at a dose of about 3 mg/kg. In one embodiment, the double stranded RNAi agent is administered at a dose of about 10 mg/kg.
- the double stranded RNAi agent is administered at a dose of about 0.5 mg/kg twice per week.
- the double stranded RNAi agent is administered at a fixed dose of about 50 mg to 200 mg. In one embodiment, the double stranded RNAi agent is administered subcutaneously. In another embodiment, the double stranded RNAi agent is administered intravenously. In another embodiment, the agent is administered intramuscularly.
- the RNAi agent is administered in two or more doses.
- the RNAi agent is administered at intervals selected from the group consisting of once every about 12 hours, once every about 24 hours, once every about 48 hours, once every about 72 hours, and once every about 96 hours.
- the RNAi agent is administered twice per week. In another embodiment, the RNAi agent is administered every other week.
- the methods of the invention further include
- the additional therapeutic agent is selected from the group consisting of an antiviral agent, a reverse transcriptase inhibitor, an immune stimulator, a therapeutic vaccine, a viral entry inhibitor, an oligonucleotide that inhibits the secretion or release of HbsAg, a capsid inhibitor, a cccDNA inhibitor, a double- stranded iRNA agent targeting HBV, and a combination of any of the foregoing.
- the methods of the invention further include administering administering to the subject a reverse transcriptase inhibitor. In yet another embodiment, the methods of the invention further include administering to the subject a reverse transcriptase inhibitor and an immune stimulator.
- the reverse transcriptase inhibitor is sleeted from the group consisting of Tenofovir disoproxil fumarate (TDF), Tenofovir alafenamide, Lamivudine, Adefovir dipivoxil, Entecavir (ETV), Telbivudine, and AGX- 1009.
- the immune stimulator is selected from the group consisting of pegylated interferon alfa 2a (PEG-IFN-Cc2a), Interferon alfa-2b, a recombinant human interleukin-7, and aToll-like receptor 7 (TLR7) agonist.
- PEG-IFN-Cc2a pegylated interferon alfa 2a
- Interferon alfa-2b Interferon alfa-2b
- a recombinant human interleukin-7 a recombinant human interleukin-7
- TLR7 aToll-like receptor 7
- the double- stranded iRNA agent targeting HBV is any one of the agents provided in any one of Tables 3, 4, 6, 14, 15, 24, 25, 27, and 28.
- the agent is AD-65403, AD-66810, or a combination thereof.
- the present invention provides iRNA compositions, which effect the RNA- induced silencing complex (RlSC)-mediated cleavage of RNA transcripts of a Hepatitis D virus (HDV) 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 correponding gene (HDV gene) in mammals.
- RNAi agents of the invention have been designed to target regions in the HDV across various clades of HDV.
- HBV targeted RNAi agents of that have been designed to inhibit all steps of the HBV life cycle, e.g., replication, assembly, secretion of virus, and secretion of sub-viral antigens, by inhibiting expression of more than one HBV gene.
- steps of the HBV life cycle e.g., replication, assembly, secretion of virus, and secretion of sub-viral antigens
- an RNAi agent of the invention targeting a single HBV gene results in significant inhibition of expression of most or all HBV transcripts.
- an RNAi agent of the invention targeting the S gene will result in inhibition of not only S gene expression but also the expression of the "downstream" reverse transcriptase gene.
- RNAi agents of the invention have been designed to inhibit HBV viral replication by targeting HBV structural genes, and the HBV X gene thereby permiting a subject's immune sytem to detect and respond to the presence of HBsAg to produce anti-HBV antibodies to clear an HBV infection.
- HDV infection requires the presence of an HBV infection.
- iRNA targeting HDV can potently mediate RNAi, resulting in significant inhibition of expression of the HDV gene.
- iRNAs targeting an HBV gene can potently mediate RNAi, resulting in significant inhibition of expression of more than one HBV gene,is effective in treating HDV infection as well.
- methods and compositions including these iRNAs are useful for treating a subject having an HDV infection and/or an HDV-associated disease, by administration of a iRNA targeted to one or both of HBV and HDV.
- the compositions provided herein can be used in a subject with an HBV infection to prevent the development of an HDV infection.
- the present invention also provides methods for treating a subject having a disorder that would benefit from inhibiting or reducing the expression of an HBV gene, e.g., HDV infection, using iRNA compositions which effect the RNA- induced silencing complex (RlSC)-mediated cleavage of RNA transcripts of an HBV gene.
- iRNA compositions which effect the RNA- induced silencing complex (RlSC)-mediated cleavage of RNA transcripts of an HBV gene.
- Very low dosages of the iRNAs of the invention can be any convenient dosages.
- RNAi specifically and efficiently mediate RNA interference (RNAi), resulting in significant inhibition of expression of the correponding gene (HDV gene).
- the iRNAs of the invention include an RNA strand (the antisense strand) having a region which is about 30 nucleotides or less in length, e.g., 15-30, 15-29, 15-
- compositions containing iRNAs to inhibit the expression of an angiotensinogen gene as well as compositions, uses, and methods for treating subjects having diseases and disorders that would benefit from inhibition and/or reduction of the expression of an HDV gene.
- an element means one element or more than one element, e.g., a plurality of elements.
- Hepatitis D virus used interchangeably with the term “HDV” refers to the well-known noncytopathic, liver-tropic DNA virus belonging to the Hepadnaviridae family. See, e.g., Ciancio and Rizzetto, Nat. Rev. 11 :68-71, 2014; Le Gal et al., Emerg. Infect. Dis. 12: 1447- 1450, 2006; and Abbas and afzal, World J. Hep., 5:666-675, 2013, all of which are incorporated by reference. Unless otherwise indictate, HDV refers to all clades and variants of HDV.
- HDV produces one protein, namely HDAg. It comes in two forms; a 27kDa large-HDAg (also referred to herein as 1HD and large HDV antigen), and a small- HDAg of 24kDa (also referred to herein as sHD and small HDV antigen).
- the N- terminals of the two forms are identical, they differ by 19 more amino acids in the C- terminal of the large HDAg.
- Both isoforms are produced from the same reading frame which contains an UAG stop codon at codon 196, which normally produces only the small-HDAg.
- editing by cellular enzyme adenosine deaminase- 1 changes the stop codon to UCG, allowing the large-HDAg to be produced.
- HDAg-S is produced in the early stages of an infection and enters the nucleus and supports viral replication.
- HDAg-L in contrast, is produced during the later stages of an infection, acts as an inhibitor of viral replication, and is required for assembly of viral particles.
- HDV mRNA sequences are readily available using publicly available databases, e.g., GenBank, UniProt, and OMIM.
- HDV also refers to naturally occurring DNA sequence variations of the HDV genome.
- Hepatitis B virus used interchangeably with the term
- HBV refers to the well-known noncytopathic, liver-tropic DNA virus belonging to the Hepadnaviridae family.
- the HBV genome is partially double- stranded, circular DNA with overlapping reading frames.
- C The core protein is coded for by gene C (HBcAg).
- Hepatitis B antigen (HBeAg) is produced by proteolytic processing of the pre-core (pre-C) protein.
- the DNA polymerase is encoded by gene P.
- Gene S is the gene that codes for the surface antigen (HBsAg).
- the HBsAg gene is one long open reading frame but contains three in frame "start" (ATG) codons that divide the gene into three sections, pre-S l, pre-S2, and S.
- polypeptides of three different sizes called large, middle, and small are produced.
- the function of the non-structural protein coded for by gene X is not fully understood but it is associated with the development of liver cancer and encodes a decoy protein which permits HBsAg in the blood to sequester anti-HBsAg antibodies and allow infectious viral particles to escape immune detection.
- the proteins encoded by the HBV genome include: envelope proteins - i) small, Hepatitis B surface antigen (HBsAg); ii) middle - preS2 plus HBsAg; iii) large - preSl plus preS2 plus HBsAg; nucleocapsid protein, hepatitis B core antigen (HBcAg).
- Hepatitis B e antigen (HBeAg) is a non- structural protein produced during the HBV replication which shares 90% amino acids with the nucleocapsid HBcAg; and the X protein is a nonstructural protein (HBx) which functions in the cytoplasm to activate various signaling pathways, many of which are controlled by modulation of cytosolic calcium and in the nucleus to regulate transcription through a direct interaction with different transcription factors and, in some cases, enhance their binding to specific transcription elements.
- HBx nonstructural protein
- HBV is one of the few DNA viruses that utilize reverse transcriptase in the replication process which involves multiple stages including entry, uncoating and transport of the virus genome to the nucleus. Initially, replication of the HBV genome involves the generation of an RNA intermediate that is then reverse transcribed to produce the DNA viral genome.
- rcDNA viral genomic relaxed circular DNA
- cccDNA episomal covalently closed circular DNA
- pgRNA cytoplasmic viral pregenomic RNA
- nucleocapsid inside which polymerase-catalyzed reverse transcription yields minus- strand DNA, which is subsequently copied into plus-strand DNA to form the progeny rcDNA genome.
- the mature nucleocapsids are then either packaged with viral envelope proteins to egress as virion particles or shuttled to the nucleus to amplify the cccDNA reservoir through the intracellular cccDNA amplification pathway.
- cccDNA is an essential component of the HBV replication cycle and is responsible for the establishment of infection and viral persistence.
- HBV infection results in the production of two different particles: 1 ) the HBV virus itself (or Dane particle) which includes a viral capsid assembled from the HBcAg and is covered by the HBsAg and is capable of reinfecting cells and 2) sub viral particles (or SVPs) which are high density lipoprotein-like particles comprised of lipids, cholesterol, cholesterol esters and the small and medium forms of the hepatitis B surface antigen HBsAg which are non-infectious.
- SVPs sub viral particles
- HBV Eight genotypes of HBV, designated A to H, have been determined, each having a distinct geographical distribution.
- the virus is non-cytopathic, with virus-specific cellular immunity being the main determinant for the outcome of exposure to HBV - acute infection with resolution of liver diseases with 6 months, or chronic HBV infection that is frequently associated with progressive liver injury.
- HBV includes any of the eight genotypes of HBV (A to H).
- the amino acid and complete coding sequence of the reference sequence of the HBV genome may be found in for example, GenBank Accession Nos. GL21326584 (SEQ ID NO: l) and GL3582357 (SEQ ID NO:3).
- HBV mRNA sequences are readily available using publicly available databases, e.g., GenBank, UniProt, and OMIM.
- HBV also refers to naturally occurring DNA sequence variations of the HBV genome.
- target sequence refers to a contiguous portion of the nucleotide sequence of an mRNA molecule formed during the transcription of an HDV 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
- the target sequence may be from about 9-36 nucleotides in length, e.g., about 15-30 nucleotides in length.
- the target sequence can be from about 15- 30 nucleotides, 15-29, 15-28, 15-27, 15-26, 15-25, 15-24, 15-23, 15-22, 15-21, 15-20, 15-19, 15- 18, 15-17, 18-30, 18-29, 18-28, 18-27, 18-26, 18-25, 18-24, 18-23, 18-22,
- 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.
- G,” “C,” “A,” “T” and “U” each generally stand for a nucleotide that contains guanine, cytosine, adenine, thymidine and uracil as a base, respectively.
- ribonucleotide or “nucleotide” can also refer to a modified nucleotide, as further detailed below, or a surrogate replacement moiety (see, e.g., Table 2).
- nucleotide comprising inosine as its base can base pair with nucleotides containing adenine, cytosine, or uracil.
- 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.
- 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.
- RNAi agent refers 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.
- RISC RNA-induced silencing complex
- iRNA directs the sequence- specific degradation of mRNA through a process known as RNA interference (RNAi).
- RNAi RNA interference
- the iRNA modulates, e.g., inhibits, the expression of an HDV gene (e.g., one or more HDV genes) in a cell, e.g., a cell within a subject, such as a mammalian subject.
- an HDV gene e.g., one or more HDV genes
- an RNAi agent of the invention includes a single stranded RNA that interacts with a target RNA sequence, e.g., an HDV target mRNA sequence, to direct the cleavage of the target RNA.
- a target RNA sequence e.g., an HDV target mRNA sequence
- Dicer Type III endonuclease
- 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).
- RISC RNA-induced silencing complex
- the invention 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).
- siRNA single stranded RNA
- the term "siRNA” is also used herein to refer to an RNAi as described above.
- the RNAi agent may be a single- stranded siRNA 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. Patent 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.
- 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 RNAi agent,” “double- stranded RNA (dsRNA) molecule,” “dsRNA agent,” or “dsRNA”.
- 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., an HDV gene.
- a double- stranded RNA 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.
- each or both strands can also include one or more non-ribonucleotides, e.g., a deoxyribonucleotide and/or a modified nucleotide.
- an "RNAi agent” may include ribonucleotides with chemical modifications; an RNAi agent may include substantial modifications at multiple nucleotides.
- modified nucleotide refers to a nucleotide having, independently, a modified sugar moiety, a modified internucleotide linkage, and/or modified nucleobase.
- modified nucleotide encompasses substitutions, additions or removal of, e.g., a functional group or atom, to internucleoside linkages, sugar moieties, or nucleobases.
- RNAi agent for the purposes of this specification and claims.
- 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 9 to 36 base pairs in length, e.g., about 15-30 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 15-30, 15-29, 15-28, 15-27, 15-26, 15-25, 15- 24, 15-23, 15-22, 15-21, 15-20, 15-19, 15-18, 15-17, 18-30, 18-29, 18-28, 18-27, 18- 26, 18-25, 18-24, 18-23, 18-22, 18-21, 18-20, 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
- 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 therefore are connected by an
- a hairpin loop can comprise at least one unpaired nucleotide.
- the hairpin loop can comprise at least 2, at least 3, at least 4, at least 5, at least 6, at least 7, at least 8, at least 9, at least 10, at least 20, at least 23 or more unpaired nucleotides.
- RNA molecules where the two substantially complementary strands of a dsRNA are comprised by separate RNA molecules, those molecules need not, but can be covalently connected.
- 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.
- an RNAi may comprise one or more nucleotide overhangs.
- an RNAi agent of the invention is a dsRNA of 24-30 nucleotides that interacts with a target RNA sequence, e.g., an HDV target mRNA sequence, to direct the cleavage of the target RNA.
- a target RNA sequence e.g., an HDV target mRNA sequence
- 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).
- RISC RNA-induced silencing complex
- one or more endonucleases within the RISC cleave the target to induce silencing (Elbashir, et ah, (2001) Genes Dev. 15: 188).
- nucleotide overhang refers to at least one unpaired nucleotide that protrudes from the duplex structure of an iRNA, e.g., a dsRNA.
- 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.
- 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.
- the antisense strand of a dsRNA has a 1-10 nucleotide, e.g., a 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 nucleotide, overhang at the 3'-end and/or the 5'- end.
- the sense strand of a dsRNA has a 1-10 nucleotide, e.g., a 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 nucleotide, overhang at the 3'-end and/or the 5'-end.
- one or more of the nucleotides in the overhang is replaced with a nucleoside thiophosphate.
- RNAi agents of the invention include RNAi agents with nucleotide overhangs at one end ⁇ i.e., agents with one overhang and one blunt end) or with nucleotide overhangs at both ends.
- 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 HDV mRNA.
- 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., an HDV 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.
- a double- stranded RNAi agent of the invention includea a nucleotide mismatch in the antisense strand.
- a double- stranded RNAi agent of the invention includea a nucleotide mismatch in the sense strand.
- the nucleotide mismatch is, for example, within 5, 4, 3, 2, or 1 nucleotides from the 3 '-terminus of the iRNA.
- the nucleotide mismatch is, for example, in the 3 '-terminal nucleotide of the iRNA.
- sense strand 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.
- 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.
- the cleavage region comprises three bases on either end of, and immediately adjacent to, the cleavage site.
- the cleavage region comprises two bases on either end of, and immediately adjacent to, the cleavage site.
- 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.
- 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, for example, be stringent conditions, where stringent conditions can include: 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,
- Complementary sequences within an iRNA 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.
- a first sequence is referred to as "substantially
- 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, while retaining the ability to hybridize under the conditions most relevant to their ultimate application, e.g., inhibition of gene expression via a RISC pathway.
- 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.
- “Complementary” sequences can also include, or be formed entirely from, non-Watson-Crick base pairs and/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.
- non- Watson-Crick base pairs include, but are not limited to, G:U Wobble or Hoogstein base pairing.
- a polynucleotide that is “substantially complementary to at least part of a messenger RNA (mRNA) refers to a polynucleotide that is
- a polynucleotide is complementary to at least a part of an HDV mRNA if the sequence is substantially complementary to a non-interrupted portion of an mRNA encoding an HDV gene.
- the sense strand polynucleotides and the antisense polynucleotides disclosed herein are fully complementary to the target HDV sequence.
- the sense strand polynucleotides and/or the antisense polynucleotides disclosed herein are substantially complementary to the target HDV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the sequences in Tables 11, 12, 31, and 32, or a fragment of any one of the sequences in Tables 11, 12, 31, and 32, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- an RNAi agent of the invention includes a sense strand that is substantially complementary to the target HDV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the sequences in Tables 11, 12, 31, and 32, or a fragment of any one of the sequences in Tables 11, 12, 31, and 32, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- an RNAi agent of the invention includes an antisense strand that is substantially complementary to the target HDV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the sequences in Tables 11, 12, 31, and 32, or a fragment of any one of the sequences in Tables 11, 12, 31, and 32, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- the RNAi agents for use in the invention target HBV. In some embodiment, such agents are fully complementary to the target HBV sequence.
- the sense strand polynucleotides and/or the antisense polynucleotides disclosed herein are substantially complementary to the target HBV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the nucleotide sequences of the agents targeting HBV provided herein, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- an RNAi agent targeting HBV for use in the present invention includes a sense strand that is substantially complementary to the target HBV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the nucleotide sequences of the agents targeting HBV provided herein, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- an RNAi agent targeting HBV for use in the present invention includes an antisense strand that is substantially complementary to the target HBV sequence and comprise a contiguous nucleotide sequence which is at least about 80% complementary over its entire length to the equivalent region of the nucleotide sequence of any one of the nucleotide sequences of the agents targeting HBV provided herein, or a fragment of any one of the nucleotide sequences of the agents targeting HBV provided herein, such as about 85%, about 86%, about 87%, about 88%, about 89%, about 90%, about % 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% complementary.
- each or both strands can also include one or more non- ribonucleotides, e.g., a deoxyribonucleotide and/or a modified nucleotide.
- an "iRNA” may include 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 an iRNA molecule, are encompassed by "iRNA" for the purposes of this specification and claims.
- an agent for use in the methods and
- compositions of the invention is a single- stranded antisense RNA molecule that inhibits a target mRNA via an antisense inhibition mechanism.
- the single- stranded antisense RNA molecule is complementary to a sequence within the target mRNA.
- the single- stranded antisense oligonucleotides can inhibit translation in a
- the single- stranded antisense RNA molecule may be about 15 to about 30 nucleotides in length and have a sequence that is complementary to a target sequence.
- the single- stranded antisense RNA molecule may comprise a sequence that is at least about 15, 16, 17, 18, 19, 20, or more contiguous nucleotides from any one of the antisense sequences described 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 camel, a llama, a horse, a goat, a rabbit, a sheep, a hamster, a guinea pig, a cat, a dog, a rat, a mouse, a horse, and a whale), or a bird ⁇ e.g., a duck or a goose).
- 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 camel, a llama, a horse, a goat, a rabbit, a sheep, a hamster,
- the subject is a human, such as a human being treated or assessed for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; a human at risk for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; a human having a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; and/or human being treated for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication, as described herein.
- a human such as a human being treated or assessed for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; a human at risk for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; a human having a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication; and/or human being treated for a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication, as described herein.
- treating refers to a beneficial or desired result including, but not limited to, alleviation or amelioration of one or more symptoms associated with unwanted HDV gene expression and/or HDV replication. “Treatment” can also mean prolonging survival as compared to expected survival in the absence of treatment.
- the term "lower” in the context of the level of HDV gene expression and/or HDV replication 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 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or more and is preferably down to a level accepted as within the range of normal for an individual without such disorder.
- the expression of the target is normalized, i.e., decreased to a level accepted as within the range of normal for an individual without such disorder, e.g., the level of a disease marker, such as, ALT or AST, is decreased to a level accepted as within the range of normal for an individual without such disorder.
- prevention when used in reference to a disease, disorder or condition thereof, that would benefit from a reduction in expression of an HDV gene and/or replication, refers to a reduction in the likelihood that a subject will develop a symptom associated with such a disease, disorder, or condition, e.g., a symptom of unwanted HDV infection, such as the presence of serum and/or liver HDV ccc DNA, the presence of serum HDV DNA, the presence of serum and/or liver HDV antigen.
- a symptom of unwanted HDV infection such as the presence of serum and/or liver HDV ccc DNA, the presence of serum HDV DNA, the presence of serum and/or liver HDV antigen.
- Hepatitis D virus-associated disease or “HDV- associated disease,” is a disease or disorder that is caused by, or associated with HDV infection and/or replication.
- the term “HDV-associated disease” includes a disease, disorder or condition that would benefit from reduction in HDV gene expression and/or replication.
- Non-limiting examples of HDV-associated diseases include, for example, hepatitis B virus infection, acute hepatits B, acute hepatitis D; acute fulminant hepatitis D; chronic hepatitis D; liver fibrosis; end-stage liver disease; hepatocellular carcinoma.
- Therapeutically effective amount is intended to include the amount of an RNAi agent that, when administered to a patient for treating a subject having an HDV infection and/or HDV- associated disease, is sufficient to effect treatment of the disease (e.g., by diminishing, ameliorating or maintaining the existing disease or one or more symptoms of disease).
- the "therapeutically effective amount” may vary depending on the RNAi agent, how the agent is administered, the disease and its severity and the history, age, weight, family history, genetic makeup, stage of pathological processes mediated by HDV gene expression, the types of preceding or concomitant treatments, if any, and other individual characteristics of the patient to be treated.
- “Prophylactically effective amount,” as used herein, is intended to include the amount of an RNAi agent that, when administered to a subject who does not yet experience or display symptoms of an HDV infection and/or HDV-associated disease, but who may be predisposed, is sufficient to prevent or ameliorate the disease or one or more symptoms of the disease. Ameliorating the disease includes slowing the course of the disease or reducing the severity of later-developing disease.
- the “prophylactically effective amount” may vary depending on the RNAi agent, how the agent is administered, the degree of risk of disease, and the history, age, weight, family history, genetic makeup, the types of preceding or concomitant treatments, if any, and other individual characteristics of the patient to be treated.
- a “therapeutically-effective amount” or “prophylacticaly effective amount” also includes an amount of an RNAi agent that produces some desired local or systemic effect at a reasonable benefit/risk ratio applicable to any treatment.
- RNAi agents 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.
- sample includes a collection of similar fluids, cells, or tissues isolated from a subject, as well as fluids, cells, or tissues present within a subject.
- 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.
- 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), the retina or parts of the retina (e.g. , retinal pigment epithelium), the central nervous system or parts of the central nervous system (e.g., ventricles or choroid plexus), or the pancreas or certain cells or parts of the pancreas.
- a "sample derived from a subject” refers tocerebrospinal fluid obtained from the subject.
- a "sample derived from a subject” refers to blood or plasma drawn from the subject.
- a “sample derived from a subject” refers to liver tissue (or subcomponents thereof) or retinal tissue (or subcomponents thereof) derived from the subject.
- the present invention provides iRNAs which inhibit the expression of one or more HDV genes.
- the iRNA agent includes double- stranded ribonucleic acid (dsRNA) molecules for inhibiting the expression of an HDV gene in a cell, such as a cell within a subject, e.g., a mammal, such as a human having an HDV-associated disease, e.g., chronic hepatitis D.
- the dsRNA 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 an HDV gene. The region of
- the iRNA inhibits the expression of the HDV gene (e.g., a human, a primate, a non-primate, or a bird HDV gene) by at least about 10% as 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 flowcytometric techniques.
- the HDV gene e.g., a human, a primate, a non-primate, or a bird HDV gene
- bDNA branched DNA
- 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, and generally fully complementary, to a target sequence.
- the target sequence can be derived from the sequence of an mRNA formed during the expression of an HDV gene.
- the other 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.
- 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.
- the duplex structure is between 15 and 30 base pairs in length, e.g., between, 15-29, 15-28, 15-27, 15-26, 15-25, 15-24, 15-23, 15-22, 15-21, 15-20, 15-
- the region of complementarity to the target sequence is between 15 and 30 nucleotides in length, e.g., between 15-29, 15-28, 15-27, 15-26, 15-25, 15-24, 15-23, 15-22, 15-21, 15-20, 15- 19, 15-18, 15- 17, 18-30, 18-29, 18-28, 18-27, 18-26,
- the dsRNA is between about 15 and about 20 nucleotides in length, or between about 25 and about 30 nucleotides in length.
- the dsRNA is long enough to serve as a substrate for the Dicer enzyme.
- dsRNAs longer than about 21-23 nucleotides in length may serve as substrates for Dicer.
- the region of an RNA targeted for cleavage will most often be part of a larger RNA molecule, often an mRNA molecule.
- 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).
- the duplex region is a primary functional portion of a dsRNA, e.g. , a duplex region of about 9 to 36 base pairs, e.g., about 10-36, 11-36, 12-36, 13-36, 14-36, 15-36, 9-35, 10-35, 11-35, 12-35, 13-35, 14- 35, 15-35, 9-34, 10-34, 1 1-34, 12-34, 13-34, 14-34, 15-34, 9-33, 10-33, 11-33, 12-33, 13-33, 14-33, 15-33, 9-32, 10-32, 11-32, 12-32, 13-32, 14-32, 15-32, 9-31, 10-31, 11- 31, 12-31, 13-32, 14-31, 15-31, 15-30, 15-29, 15-28, 15-27, 15-26, 15-25, 15-24, 15-
- an RNA molecule or complex of RNA molecules having a duplex region greater than 30 base pairs is a dsRNA.
- a miRNA is a dsRNA.
- a dsRNA is not a naturally occurring miRNA.
- an iRNA agent useful to target HDV gene expression is not generated in the target cell by cleavage of a larger dsRNA.
- a dsRNA as described herein can further include one or more single- stranded nucleotide overhangs e.g., 1, 2, 3, or 4 nucleotides. dsRNAs having at least one nucleotide overhang can have unexpectedly 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.
- 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.
- a dsRNA can be synthesized by standard methods known in the art as further discussed below, e.g., by use of an automated DNA synthesizer, such as are commercially available from, for example, Biosearch, Applied Biosystems, Inc.
- iRNA 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 siRNA 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. Single- stranded oligonucleotides of the invention can be prepared using solution-phase or solid-phase organic synthesis or both.
- 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 11, 12, 31, and 32 and the corresponding antisense strand of the sense strand is selected from the group of sequences of any one of Tables 11, 12, 31, and 32.
- 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 an HDV gene.
- a dsRNA will include two oligonucleotides, where one oligonucleotide is described as the sense strand in any one of Tables 11, 12, 31, and 32 and the second oligonucleotide is described as the corresponding antisense strand of the sense strand in any one of Tables 11, 12, 31, and 32.
- the substantially complementary sequences of the dsRNA are contained on separate oligonucleotides. In another embodiment, the substantially complementary sequences of the dsRNA are contained on a single oligonucleotide.
- RNA of the iRNA of the invention e.g., a dsRNA of the invention
- the RNA of the iRNA of the invention may comprise any one of the sequences set forth in any one of Tables 11, 12, 31, and 32 that is un-modified, un-conjugated, and/or modified and/or conjugated differently than described therein.
- dsRNAs having a duplex structure of between about 20 and 23 base pairs, e.g., 21, base pairs have been hailed as particularly effective in inducing RNA interference (Elbashir et cil., EMBO 2001, 20:6877-6888).
- RNA duplex structures can also be effective (Chu and Rana (2007) RNA 14: 1714-1719; Kim et cil. (2005) Nat Biotech 23:222-226).
- 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 one of the sequences of any one of Tables 11, 12, 31, and 32 minus only a few nucleotides on one or both ends can be similarly effective as compared to the dsRNAs described above.
- dsRNAs having a sequence of at least 15, 16, 17, 18, 19, 20, or more contiguous nucleotides derived from one of the sequences of any one of Tables 11, 12, 31, and 32, and differing in their ability to inhibit the expression of a HDV 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.
- RNAs provided in any one of Tables 11, 12, 31, and 32 identify a site(s) in a HDV transcript that is susceptible to RISC-mediated cleavage.
- the present invention further features iRNAs that target within one of these sites.
- an iRNA is said to target within a particular site of an RNA transcript if the iRNA promotes cleavage of the transcript anywhere within that particular site.
- Such an iRNA will generally include at least about 15 contiguous nucleotides from one of the sequences provided inany one of Tables 11, 12, 31, and 32 coupled to additional nucleotide sequences taken from the region contiguous to the selected sequence in a HDV gene.
- target sequence is generally about 15-30 nucleotides in length, there is wide variation in the suitability of particular sequences in this range for directing cleavage of any given target RNA.
- Various software packages and the guidelines set out herein provide guidance for the identification of optimal target sequences for any given gene target, but an empirical approach can also be taken in which a "window” or “mask” of a given size (as a non-limiting example, 21 nucleotides) is literally or figuratively (including, e.g., in silico) placed on the target RNA sequence to identify sequences in the size range that can serve as target sequences.
- the next potential target sequence can be identified, until the complete set of possible sequences is identified for any given target size selected.
- This process coupled with systematic synthesis and testing of the identified sequences (using assays as described herein or as known in the art) to identify those sequences that perform optimally can identify those RNA sequences that, when targeted with an iRNA agent, mediate the best inhibition of target gene expression.
- sequences identified for example, in any one of Tables 11, 12, 31, and 32 represent effective target sequences, it is contemplated that further
- optimization of inhibition efficiency can be achieved by progressively "walking the window" one nucleotide upstream or downstream of the given sequences to identify sequences with equal or better inhibition characteristics.
- iRNA as described herein can contain one or more mismatches to the target sequence. In one embodiment, an iRNA as described herein contains no more than 3 mismatches.
- the antisense strand of the iRNA contains mismatches to a target sequence, it is preferable that the area of mismatch is not located in the center of the region of complementarity. If the antisense strand of the iRNA contains mismatches to the target sequence, it is preferable that the mismatch be restricted to be within the last 5 nucleotides from either the 5'- or 3 '-end of the region of complementarity. For example, for a 23 nucleotide iRNA agent the strand which is complementary to a region of an HDV 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 iRNA containing a mismatch to a target sequence is effective in inhibiting the expression of an HDV gene. Consideration of the efficacy of iRNAs with mismatches in inhibiting expression of an HDV gene is important, especially if the particular region of complementarity in an HDV gene is known to have polymorphic sequence variation within the population.
- the RNA of the iRNA of the invention e.g., a dsRNA
- a dsRNA is un-modified, and does not comprise, e.g., chemical modifications and/or conjugations known in the art and described herein.
- the RNA of an iRNA of the invention e.g., a dsRNA
- substantially all of the nucleotides of an iRNA of the invention are modified.
- all of the nucleotides of an iRNA of the invention are modified iRNAs of the invention in which "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.
- nucleic acids featured in the invention can be synthesized and/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
- RNA 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; and/or backbone modifications, including modification or replacement of the phosphodiester linkages.
- 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.
- modified RNAs that do not have a phosphorus atom in their internucleoside backbone can also be considered to be oligonucleo sides.
- a modified iRNA will have a phosphorus atom in its internucleoside backbone.
- 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 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.
- phosphorus-containing linkages include, but are not limited to, U.S. Patent Nos.
- 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.
- 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
- methylenehydrazino backbones sulfonate and sulfonamide backbones; amide backbones; and others having mixed N, O, S and CH 2 component parts.
- oligonucleosides include, but are not limited to, U.S. Patent Nos. 5,034,506;
- RNA mimetics are contemplated for use in iRNAs, in which both the sugar and the intemucleoside linkage, i.e., the backbone, of the nucleotide units are replaced with novel groups.
- the base units are maintained for hybridization with an appropriate nucleic acid target compound.
- a peptide nucleic acid PNA
- PNA compounds the sugar backbone of an RNA is replaced with an amide containing backbone, in particular an aminoethylglycine backbone.
- nucleobases are retained and are bound directly or indirectly to aza nitrogen atoms of the amide portion of the backbone.
- Representative U.S. patents that teach the preparation of PNA compounds include, but are not limited to, U.S. Patent 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.
- phosphorothioate backbones and oligonucleosides with heteroatom backbones and in particular -CH 2 -NH-CH 2 -, -CH 2 -N(CH 3 )--0--CH 2 -[known as a methylene (methylimino) or MMI backbone], -CH 2 -0-N(CH 3 )-CH 2 -, ⁇ CH 2 ⁇ N(CH 3 ) ⁇ N(CH 3 )-CH 2 - and --N(CH 3 )---CH 2 --CH 2 --[wherein the native phosphodiester backbone is represented as— O— P— O— CH 2 — ] of the above-referenced U.S. Patent No. 5,489,677, and the amide backbones of the above-referenced U.S. Patent No.
- the RNAs featured herein have morpholino backbone structures of the above-referenced U.S. Patent No. 5,034,506.
- 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; 0-, S-, or N-alkyl; 0-, S-, or N-alkenyl; 0-, S- or N-alkynyl; or O- alkyl-O-alkyl, wherein the alkyl, alkenyl and alkynyl can be substituted or unsubstituted Ci to C 10 alkyl or C 2 to C 10 alkenyl and alkynyl.
- Exemplary suitable modifications include 0[(CH 2 ) n O] m CH 3 , 0(CH 2 ). n OCH 3 , 0(CH 2 ) n NH 2 , 0(CH 2 ) n CH 3 , 0(CH 2 ) n ONH 2 , and 0(CH 2 ) n ON[(CH 2 ) n CH 3 )] 2 , where n and m are from 1 to about 10.
- dsRNAs include one of the following at the 2' position: Ci to C 10 lower alkyl, substituted lower alkyl, alkaryl, aralkyl, O-alkaryl or O-aralkyl, SH, SCH 3 , OCN, CI, Br, CN, CF 3 , OCF 3 , SOCH 3 , S0 2 CH 3 , ON0 2 , N0 2 , N 3 , NH 2 , 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.
- the modification includes a 2'-methoxyethoxy (2'- 0-CH 2 CH 2 OCH 3 , also known as 2'-0-(2-methoxyethyl) or 2'-MOE) (Martin et al, Helv. Chim. Acta, 1995, 78:486-504) i.e., an alkoxy-alkoxy group.
- 2'-methoxyethoxy 2'- 0-CH 2 CH 2 OCH 3
- 2'-MOE 2'-methoxyethoxy
- Another exemplary modification is 2'-dimethylaminooxyethoxy, i.e., a 0(CH 2 ) 2 ON(CH 3 ) 2 group, also known as 2'-DMAOE, as described in examples herein below, and 2'- dimethylaminoethoxyethoxy (also known in the art as 2'-0- dimethylaminoethoxyethyl or 2'-DMAEOE), i.e., 2'-0--CH 2 -0--CH 2 -N(CH 2 ) 2 .
- modifications include 2'-methoxy (2'-OCH 3 ), 2'-aminopropoxy (2'- OCH 2 CH 2 CH 2 NH 2 ) 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 U.S. patents that teach the preparation of such modified sugar structures include, but are not limited to, U.S. Pat. Nos.
- nucleobase can also include nucleobase (often referred to in the art simply as “base”) modifications or substitutions.
- base nucleobase
- 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 deoxy-thymine (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
- 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.
- 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
- RNA of an iRNA can also be modified to include one or more bicyclic sugar moities.
- 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.
- the bridge connects the 4'-carbon and the 2 '-carbon of the sugar ring.
- 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.
- an LNA is a nucleotide comprising a bicyclic sugar moiety comprising a 4'-CH2-0-2' 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(l):439-447; Mook, OR.
- 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.
- the antisense polynucleotide agents of the invention include one or more bicyclic nucleosides comprising a 4' to 2' bridge.
- 4' to 2' bridged bicyclic nucleosides include but are not limited to 4'-(CH2)— 0-2' (LNA); 4'-(CH2)— S-2'; 4'-(CH2)2— 0-2' (ENA); 4'-CH(CH3)— 0-2' (also referred to as "constrained ethyl” or "cEt") and 4'-CH(CH20CH3)— 0-2' (and analogs thereof; see, e.g., U.S. Pat. No. 7,399,845); 4'-C(CH3)(CH3)— 0-2' (and analogs thereof; see e.g., US Patent No.
- Additional representative U.S. Patents and US Patent Publications that teach the preparation of locked nucleic acid nucleotides include, but are not limited to, the following: U.S. Patent 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;
- bicyclic nucleosides can be prepared having one or more stereochemical sugar configurations including for example ⁇ -L-ribofuranose and ⁇ -D- ribofuranose (see WO 99/14226).
- RNA of an iRNA can also be modified to include one or more constrained ethyl nucleotides.
- a "constrained ethyl nucleotide” or “cEt” is a locked nucleic acid comprising a bicyclic sugar moiety comprising a 4'-CH(CH3)-0-2' bridge.
- a constrained ethyl nucleotide is in the S conformation referred to herein as "S-cEt.”
- 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.
- nucleotides of an iRNA of the invention may also include a hydroxymethyl substituted nucleotide.
- a "hydroxymethyl substituted nucleotide” is an acyclic 2'-3'-seco-nucleotide, also referred to as an "unlocked nucleic acid" (“UNA”) modification
- 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'- 0-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.
- 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 RNAi agent.
- Suitable phosphate mimics are disclosed in, for example US Patent Publication No. 2012/0157511, the entire contents of which are incorporated herein by reference.
- the double- stranded RNAi agents of the invention include agents with chemical modifications as disclosed, for example, in WO 2013/075035, filed on November 16, 2012, the entire contents of which are incorporated herein by reference.
- a superior result may be obtained by introducing one or more motifs of three identical modifications on three consecutive nucleotides into a sense strand and/or antisense strand of an RNAi agent, particularly at or near the cleavage site.
- the sense strand and antisense strand of the RNAi agent may otherwise be completely modified.
- RNAi agent may be optionally conjugated with a GalNAc derivative ligand, for instance on the sense strand.
- the resulting RNAi agents present superior gene silencing activity.
- RNAi agent when the sense strand and antisense strand of the double- stranded RNAi 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 an RNAi agent, the gene silencing acitivity of the RNAi agent was superiorly enhanced.
- the invention provides double- stranded RNAi agents capable of inhibiting the expression of a target gene (i.e., HDV gene) in vivo.
- the RNAi agent comprises a sense strand and an antisense strand.
- Each strand of the RNAi agent may range from 12-30 nucleotides in length.
- each strand may be between 14-30 nucleotides in length, 17-30 nucleotides in length, 25-30 nucleotides in length, 27-30 nucleotides in length, 17-23 nucleotides in length, 17-21 nucleotides in length, 17-19 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.
- RNAi agent a duplex double stranded RNA
- the duplex region of an RNAi agent may be 12-30 nucleotide pairs in length.
- the duplex region can be between 14-30 nucleotide pairs in length, 17-30 nucleotide pairs in length, 27-30 nucleotide pairs in length, 17 - 23 nucleotide pairs in length, 17-21 nucleotide pairs in length, 17-19 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.
- the duplex region is selected from 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, and 27 nucleotides in length.
- the RNAi agent may contain one or more overhang regions and/or capping groups at the 3 '-end, 5 '-end, or both ends of one or both strands.
- the overhang can be 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.
- 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.
- the nucleotides in the overhang region of the RNAi agent can each independently be a modified or unmodified nucleotide including, but no limited to 2'-sugar modified, such as, 2-F, 2'-Omethyl, thymidine (T), 2 -0- methoxyethyl-5-methyluridine (Teo), 2 -0-methoxyethyladenosine (Aeo), 2 -0- methoxyethyl-5-methylcytidine (m5Ceo), and any combinations thereof.
- 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.
- the 5'- or 3'- overhangs at the sense strand, antisense strand or both strands of the RNAi agent may be phosphorylated.
- the overhang region(s) contains two nucleotides having a phosphorothioate between the two nucleotides, where the two nucleotides can be the same or different.
- the overhang is present at the 3 '-end of the sense strand, antisense strand, or both strands. In one embodiment, this 3'-overhang is present in the antisense strand. In one embodiment, this 3 '-overhang is present in the sense strand.
- the RNAi agent may contain only a single overhang, which can strengthen the interference activity of the RNAi, without affecting its overall stability.
- the single- stranded overhang may be located at the 3'-terminal end of the sense strand or, alternatively, at the 3'-terminal end of the antisense strand.
- the RNAi may also have a blunt end, located at the 5 '-end of the antisense strand (or the 3 '-end of the sense strand) or vice versa.
- the antisense strand of the RNAi 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.
- the RNAi agent is a double ended bluntmer 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, 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, 13 from the 5'end.
- the RNAi agent is a double ended bluntmer 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, 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, 13 from the 5'end.
- the RNAi agent is a double ended bluntmer 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, 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, 13 from the 5'end.
- the RNAi 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, 11 from the 5'end; the antisense strand contains at least one motif of three 2'-0- methyl modifications on three consecutive nucleotides at positions 11, 12, 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 is at the 3 '-end of the antisense strand.
- 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.
- every nucleotide in the sense strand and the antisense strand of the RNAi agent, including the nucleotides that are part of the motifs are modified nucleotides.
- each residue is independently modified with a 2'-0-methyl or 3'-fluoro, e.g., in an alternating motif.
- the RNAi agent further comprises a ligand (preferably GalNAc 3 ).
- the RNAi 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 rib
- the RNAi agent comprises sense and antisense strands, wherein the RNAi 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'-0-methyl modifications on three consecutive nucleotides at position 11, 12, 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 region which is at least 25 nucleotides in length, and the second strand is sufficiently complemenatary 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 RNAi agent preferentially results in an siRNA comprising the
- the sense strand of the RNAi 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.
- the antisense strand of the RNAi 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
- the cleavage site of the antisense strand is typically around the 10, 11 and 12 positions from the 5 '-end.
- the motifs of three identical modifications may occur at the 9, 10, 11 positions; 10, 11, 12 positions; 11, 12, 13 positions; 12, 13, 14 positions; or 13, 14, 15 positions of the antisense strand, the count starting from the 1 st nucleotide from the 5 '-end of the antisense strand, or, the count starting from the 1 st 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 RNAi from the 5 '-end.
- the sense strand of the RNAi 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.
- 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.
- at least two nucleotides may overlap, or all three nucleotides may overlap.
- the sense strand of the RNAi 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 adajacent to the first motif or is separated by at least one or more nucleotides.
- the motifs are immediately adjacent to each other then the chemistry 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.
- the antisense strand of the RNAi 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.
- the wing modification on the sense strand or antisense strand of the RNAi agent typically does not include the first one or two terminal nucleotides at the 3 '-end, 5 '-end or both ends of the strand.
- the wing modification on the sense strand or antisense strand of the RNAi 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.
- the wing modifications may fall on the same end of the duplex region, and have an overlap of one, two or three nucleotides.
- the sense strand and the antisense strand of the RNAi 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.
- every nucleotide in the sense strand and antisense strand of the RNAi agent 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 and/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.
- 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 O of a phosphate moiety.
- the modification will occur at all of the subject positions in the nucleic acid but in many cases it will not.
- 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 a RNA or may only occur in a single strand region of a RNA.
- a phosphorothioate modification at a non- linking O 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.
- nucleotides or nucleotide surrogates may be included in single strand overhangs, e.g., in a 5' or 3' overhang, or in both.
- 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.
- 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'-0-allyl, 2'-C- allyl, 2'-deoxy, 2'-hydroxyl, or 2'-fluoro.
- the strands can contain more than one modification.
- each residue of the sense strand and antisense strand is independently modified with 2'- O-methyl or 2'- fluoro.
- the N a and/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.
- the alternating motif can be "ABABABABABAB...,” “AABB AABBAABB...,” “AAB AAB AAB AAB ... ,” “AAAB AAAB AAAB ... ,” “AAABBB AAABBB ... ,” or "ABCABCABCABC .
- the type of modifications contained in the alternating motif may be the same or different.
- 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
- the RNAi 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.
- 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 '-3' of the strand and the alternating motif in the antisense strand may start with "BAB ABA" from 5 '-3 Of the strand within the duplex region.
- the alternating motif in the sense strand may start with "AABBAABB” from 5 '-3' of the strand and the alternating motif in the antisenese strand may start with "BBAABBAA” from 5 '-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.
- the RNAi agent comprises the pattern of the alternating motif of 2'-0-methyl modification and 2'-F modification on the sense strand initially has a shift relative to the pattern of the alternating motif of 2'-0-methyl modification and 2'-F modification on the antisense strand initially, i.e., the 2'-0-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
- the 1 position of the antisense strand may start with the 2'- O- methyl modification.
- the introduction of one or more motifs of three identical modifications on three consecutive nucleotides to the sense strand and/or antisense strand interrupts the initial modification pattern present in the sense strand and/or antisense strand.
- This interruption of the modification pattern of the sense and/or antisense strand by introducing one or more motifs of three identical modifications on three consecutive nucleotides to the sense and/or antisense strand surprisingly enhances the gene silencing acitivty to the target gene.
- the modification of the nucleotide next to the motif is a different modification than the modification of the motif.
- the portion of the sequence containing the motif is
- N a and/or N b may be present or absent when there is a wing modification present.
- the RNAi agent may further comprise at least one phosphorothioate or methylphosphonate internucleotide linkage.
- methylphosphonate internucleotide linkage modification may occur on any nucleotide of the sense strand or antisense strand or both strands in any position of the strand.
- the internucleotide linkage modification may occur on every nucleotide on the sense strand and/or antisense strand; each internucleotide linkage modification may occur in an alternating pattern on the sense strand and/or antisense strand; or the sense strand or antisense strand may contain both internucleotide linkage
- 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
- RNAi agent comprises 6-8phosphorothioate internucleotide linkages.
- the antisense strand comprises two phosphorothioate internucleotide linkages at the 5 '-terminus and two phosphorothioate internucleotide linkages at the 3 '-terminus
- the sense strand comprises at least two phosphorothioate internucleotide linkages at either the 5 '-terminus or the 3 '-terminus.
- the RNAi comprises a phosphorothioate or
- 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.
- terminal three nucleotides 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, and/or the 5 'end of the antisense strand.
- 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.
- the RNAi 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.
- the RNAi agent comprises mismatch(es) with the target, within the duplex, or combinations thereof.
- the mistmatch 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).
- A:U is preferred over G:C
- G:U is preferred over G:C
- the RNAi 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.
- the nucleotide at the 1 position within the duplex region from the 5 '-end in the antisense strand is selected from the group consisting of A, dA, dU, U, and dT.
- 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.
- the first base pair within the duplex region from the 5'- end of the antisense strand is an AU base pair.
- the nucleotide at the 3 '-end of the sense strand is deoxy- thymine (dT).
- the nucleotide at the 3 '-end of the antisense strand is deoxy- thymine (dT).
- there is a short sequence of deoxy-thymine nucleotides for example, two dT nucleotides on the 3 '-end of the sense and/or antisense strand.
- the sense strand sequence may be represented by formula
- i and j are each independently 0 or 1 ;
- p and q are each independently 0-6;
- each N a independently represents an oligonucleotide sequence comprising 0- 25 modified nucleotides, each sequence comprising at least two differently modified nucleotides;
- each N b independently represents an oligonucleotide sequence comprising 0- 10 modified nucleotides
- each n p and n q independently represent an overhang nucleotide
- XXX, YYY and ZZZ each independently represent one motif of three identical modifications on three consecutive nucleotides.
- YYY is all 2'-F modified nucleotides.
- the N a and/or N b comprise modifications of alternating pattern.
- the YYY motif occurs at or near the cleavage site of the sense strand.
- 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 1 st nucleotide, from the 5 '-end; or optionally, the count starting at the 1 st paired nucleotide within the duplex region, from the 5'- end.
- 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:
- 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.
- 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.
- each N b independently represents an oligonucleotide sequence comprising 0- 10, 0-7, 0-5, 0-4, 0-2 or 0 modified nucleotides.
- N b is 0, 1, 2, 3, 4, 5 or 6
- Each N a can be
- 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.
- each N a independently can represent an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.
- the antisense strand sequence of the RNAi may be represented by formula (II):
- k and 1 are each independently 0 or 1 ;
- p' and q' are each independently 0-6;
- each N a ' independently represents an oligonucleotide sequence comprising 0- 25 modified nucleotides, each sequence comprising at least two differently modified nucleotides;
- each N b ' independently represents an oligonucleotide sequence comprising 0- 10 modified nucleotides
- each n p ' and n q ' independently represent an overhang nucleotide
- N b ' and Y' do not have the same modification
- ⁇ ' ⁇ ' ⁇ ', Y'Y'Y' and Z'Z'Z' each independently represent one motif of three identical modifications on three consecutive nucleotides.
- the N a ' and/or N b ' comprise modifications of alternating pattern.
- the Y'Y'Y' motif occurs at or near the cleavage site of the antisense strand.
- 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 1 st nucleotide, from the 5 '-end; or optionally, the count starting at the 1 st paired nucleotide within the duplex region, from the 5'- end.
- the Y'Y'Y' motif occurs at positions 11, 12, 13.
- Y'Y'Y' motif is all 2'-OMe modified nucleotides.
- k is 1 and 1 is 0, or k is 0 and 1 is 1, or both k and 1 are 1.
- the antisense strand can therefore be represented by the following formulas:
- 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.
- 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.
- 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.
- N b is 0, 1, 2, 3, 4, 5 or 6.
- k is 0 and 1 is 0 and the antisense strand may be represented by the formula:
- each N a ' is represented as formula (Ila)
- 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.
- Each nucleotide of the sense strand and antisense strand may be independently modified with LNA, CRN, UNA, cEt, HNA, CeNA, 2'-methoxyethyl, 2'-0-methyl, 2'-0-allyl, 2'-C- allyl, 2' -hydroxyl, or 2'-fluoro.
- each nucleotide of the sense strand and antisense strand is independently modified with 2'-0-methyl or 2'- fluoro.
- Each X, Y, Z, X', Y' and Z' in particular, may represent a 2'-0-methyl modification or a 2' -fluoro modification.
- the sense strand of the RNAi 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 1 st nucleotide from the 5 '-end, or optionally, the count starting at the 1 st 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.
- the antisense strand may contain ⁇ ' motif occurring at positions 11, 12, 13 of the strand, the count starting from the 1 st nucleotide from the 5 '-end, or optionally, the count starting at the 1 st paired nucleotide within the duplex region, from the 5'- end; and Y' represents 2'-0-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.
- the sense strand represented by any one of the above formulas (la), (lb), (Ic), and (Id) forms a duplex with a antisense strand being represented by any one of formulas (Ila),
- RNAi 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 RNAi duplex represented by formula (III):
- i, j, k, and 1 are each independently 0 or 1;
- p, p', q, and q' are each independently 0-6;
- 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;
- each N b and N b independently represents an oligonucleotide sequence comprising 0-10 modified nucleotides
- each n p ', n p , n q ', and n q independently represents an overhang nucleotide
- XXX, YYY, ZZZ, ⁇ ' ⁇ ' ⁇ ', Y'Y'Y', and Z'Z'Z' each independently represent one motif of three identical modifications on three consecutive nucleotides.
- 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.
- k is 0 and 1 is 0; or k is 1 and 1 is 0; k is 0 and 1 is 1 ; or both k and 1 are 0; or both k and 1 are 1.
- RNAi duplex Exemplary combinations of the sense strand and antisense strand forming a RNAi duplex include the formulas below:
- each N a independently represents an oligonucleotide sequence comprising 2-20, 2-15, or 2-10 modified nucleotides.
- 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.
- 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.
- 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 Omodified 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 ', Nb and Nb independently comprises modifications of alternating pattern.
- Each of X, Y and Z in formulas (III), (Ilia), (Illb), (IIIc), and (Hid) may be the same or different from each other.
- RNAi agent When the RNAi agent is represented by formula (III), (Ilia), (Illb), (IIIc), and (Hid), 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.
- RNAi agent When the RNAi agent is represented by formula (Illb) or (Hid), 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
- RNAi agent When the RNAi agent is represented as formula (IIIc) or (Hid), 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.
- 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
- the modification on the X nucleotide is different than the modification on the X' nucleotide
- the N a modifications are 2'-0-methyl or 2'-fluoro modifications.
- the N a modifications are 2'-0- 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.
- the N a modifications are 2'-0- methyl or 2'-fluoro modifications , n p ' >0 and at least one n p ' is linked to a
- the sense strand is conjugated to one or more GalNAc derivatives attached through a bivalent or trivalent branched linker (described below).
- the N a modifications are 2'-0-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
- the sense strand is conjugated to one or more GalNAc derivatives attached through a bivalent or trivalent branched linker.
- the N a modifications are 2'-0-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.
- the RNAi agent is a multimer containing at least two duplexes represented by formula (III), (Ilia), (Illb), (IIIc), and (Hid), wherein the duplexes are connected by a linker.
- the linker can be cleavable or non-cleavable.
- 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.
- the RNAi agent is a multimer containing three, four, five, six or more duplexes represented by formula (III), (Ilia), (Illb), (IIIc), and (Hid), wherein the duplexes are connected by a linker.
- the linker can be cleavable or non- cleavable.
- 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.
- two RNAi agents represented by formula (III), (Ilia), (Illb), (IIIc), and (Hid) are linked to each other at the 5' end, and one or both of the 3' ends and are optionally conjugated to 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.
- RNAi agents that can be used in the methods of the invention.
- Such publications include WO2007/091269, US Patent No. 7858769, WO2010/141511, WO2007/117686, WO2009/014887 and
- the RNAi agent that contains conjugations of one or more carbohydrate moieties to a RNAi agent can optimize one or more properties of the RNAi agent.
- the carbohydrate moiety will be attached to a modified subunit of the RNAi agent.
- the ribose sugar of one or more ribonucleotide subunits of a dsRNA agent can be replaced with another moiety, e.g., a non-carbohydrate (preferably 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.
- the ligand may be attached to the polynucleotide via a carrier.
- the carriers include (i) at least one "backbone attachment point,” preferably 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” 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.
- the selected moiety is connected by an intervening tether to the cyclic carrier.
- 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.
- RNAi agents may be conjugated to a ligand via a carrier, wherein the carrier can be cyclic group or acyclic group; preferably, the cyclic group is selected from pyrrolidinyl, pyrazolinyl, pyrazolidinyl, imidazolinyl, imidazolidinyl, piperidinyl, piperazinyl, [l,3]dioxolane, oxazolidinyl, isoxazolidinyl, morpholinyl, thiazolidinyl, isothiazolidinyl, quinoxalinyl, pyridazinonyl, tetrahydrofuryl and and decalin; preferably, the acyclic group is selected from serinol backbone or
- the RNAi agent for use in the methods of the invention is an agent selected from the group of agents listed in any one of Tables 11, 12, 31, and 32. These agents may further comprise a ligand.
- the agent is selected from the group consisting of AD-70260.1, AD-70232.1, AD- 70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD- 70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD- 67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD- 70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1.
- the agent is selected from the group consisting of AD-70260.1, AD- 70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD- 70278.1, or AD-70295.1.
- RNA of an iRNA of the invention involves chemically linking to the RNA one or more ligands, moieties or conjugates that enhance the activity, cellular distribution or cellular uptake of the iRNA.
- 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), 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;
- 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).
- a ligand alters the distribution, targeting or lifetime of an iRNA agent into which it is incorporated.
- a ligand provides an enhanced affinity for a selected target, e.g., molecule, cell or cell type,
- ligand 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.
- Preferred ligands will not take part in duplex pairing in a duplexed nucleic acid.
- Ligands can include a naturally occurring substance, such as a protein (e.g., human serum albumin (HSA), low-density lipoprotein (LDL), or globulin);
- a protein e.g., human serum albumin (HSA), low-density lipoprotein (LDL), or globulin
- HSA human serum albumin
- LDL low-density lipoprotein
- globulin e.g., human serum albumin (HSA), low-density lipoprotein (LDL), or globulin
- the ligand can also be a recombinant or synthetic molecule, such as a synthetic polymer, e.g., a synthetic polyamino acid.
- polyamino acids examples 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.
- 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.
- 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 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-gulucoseamine multivalent mannose, multivalent fucose, glycosylated polyaminoacids, multivalent galactose, transferrin, bisphosphonate, polyglutamate, polyaspartate, a lipid, cholesterol, a steroid, bile acid, folate, vitamin B 12, vitamin A, biotin, or an RGD peptide or RGD peptide mimetic.
- 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.
- 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.
- 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
- 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.
- 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-gulucosamine multivalent mannose, or multivalent fucose.
- the ligand can be, for example, a lipopolysaccharide, an activator of p38 MAP kinase, or an activator of NF-KB.
- 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, and/or intermediate filaments.
- the drug can be, for example, taxon, vincristine, vinblastine, cytochalasin, nocodazole, japlakinolide, latrunculin A, phalloidin, swinholide A, indanocine, or myoservin.
- 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, 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 etc.
- 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 20 bases, comprising multiple of
- phosphorothioate linkages in the backbone are also amenable to the present invention as ligands ⁇ e.g. as PK modulating ligands).
- ligands ⁇ e.g. as PK modulating ligands.
- aptamers that bind serum components ⁇ e.g. serum proteins
- serum components ⁇ e.g. serum proteins
- Ligand-conjugated oligonucleotides 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.
- 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 means 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.
- 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.
- 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.
- the ligand or conjugate is a lipid or lipid-based molecule.
- a lipid or lipid-based molecule preferably binds a serum protein, e.g., human serum albumin (HSA).
- HSA binding ligand allows for distribution of the conjugate to a target tissue, e.g., a non-kidney target tissue of the body.
- 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, and/or (c) can be used to adjust binding to a serum protein, e.g., HSA.
- a serum protein e.g., HSA.
- a lipid based ligand can be used to inhibit, e.g., control the binding of the conjugate to a target tissue.
- 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.
- the lipid based ligand binds HSA.
- it binds HSA with a sufficient affinity such that the conjugate will be preferably distributed to a non-kidney tissue.
- the affinity it is preferred that the affinity not be so strong that the HSA-ligand binding cannot be reversed.
- the lipid based ligand binds HSA weakly or not at all, such that the conjugate will be preferably 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.
- the ligand is a moiety, e.g., a vitamin, which is taken up by a target cell, e.g., a proliferating cell.
- a target cell e.g., a proliferating cell.
- 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).
- the ligand is a cell-permeation agent, preferably a helical cell-permeation agent.
- 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 preferably an alpha-helical agent, which preferably has a lipophilic and a lipophobic phase.
- 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.
- 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.
- 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: 1831).
- An RFGF analogue e.g., amino acid sequence AALLPVLLAAP (SEQ ID NO: 1832) 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
- 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).
- OBOC one-bead-one-compound
- 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.
- RGD arginine- glycine-aspartic acid
- 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.
- 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).
- peptidiomimemtics may include D-amino acids, as well as synthetic RGD mimics.
- RGD one can use other moieties that target the integrin ligand. Preferred conjugates of this ligand target PECAM-1 or VEGF.
- 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 a-helical linear peptide (e.g., LL-37 or Ceropin PI), a disulfide bond-containing peptide (e.g., a -defensin, ⁇ - 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).
- NLS nuclear localization signal
- 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).
- an iRNA oligonucleotide further comprises a carbohydrate.
- the carbohydrate conjugated iRNA are advantageous for the in vivo delivery of nucleic acids, as well as compositions suitable for in vivo therapeutic use, as described 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 HDV and above (e.g., C6, C7, or C8) sugars; di- and trisaccharides include sugars having two or three monosaccharide units (e.g., C6, C7, or C8).
- a carbohydrate conjugate for use in the compositions and methods of the invention is a monosaccharide.
- the sugars mono-, di-, tri- and oligosaccharides containing from about 4, 5, 6, 7, 8, or 9 monosaccharide units
- polysaccharides such as starches, glycogen, cellulose and polysaccharide gums.
- Specific monosaccharides include HDV and above (e.g., C6, C7, or C8) sugar
- N-acetylgalactosamine such as N-acetylgalactosamine
- a carbohydrate conjugate for use in the compositions and methods of the invention is selected from the group consisting of:
- the carbohydrate conjugate further comprises one or more additional ligands as described above, such as, but not limited to, a PK modulator and/or a cell permeation peptide.
- the conjugate or ligand described herein can be attached to an iRNA oligonucleotide with various linkers that can be cleavable or non-cleavable.
- 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 NR8, C(O), C(0)NH, SO, S0 2 , S0 2 NH 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, alky
- alkenylarylalkenyl alkenylarylalkynyl, alkynylarylalkyl, alkynylarylalkenyl, alkynylarylalkynyl, alkylheteroarylalkyl, alkylheteroarylalkenyl,
- alkylheteroarylalkynyl alkenylheteroarylalkyl, alkenylheteroarylalkenyl, alkenylhetero arylalkynyl, alkynylheteroarylalkyl, alkynylheteroarylalkenyl, alkynylheteroarylalkynyl, alkylheterocyclylalkyl, alkylheterocyclylalkenyl, alkylhererocyclylalkynyl, alkenylheterocyclylalkyl, alkenylheterocyclylalkenyl, alkenylheterocyclylalkynyl, alkynylheterocyclylalkyl, alkynylheterocyclylalkenyl, alkynylheterocyclylalkynyl, alkynylheterocyclylalkyl, alkyn
- the linker is between about 1-24 atoms, 2-24, 3-24, 4-24, 5-24, 6-24, 6- 18, 7-18, 8- 18 atoms, 7-17, 8-17, 6- 16, 7-16, or 8- 16 atoms.
- 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.
- 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 about 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).
- a first reference condition which can, e.g., be selected to mimic or represent intracellular conditions
- a second reference condition which can, e.g., be selected to mimic or represent conditions found in the blood or serum.
- 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.
- 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 preferred pH, thereby releasing a cationic lipid from the ligand inside the cell, or into the desired compartment of the cell.
- 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.
- 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.
- Linkers that contain peptide bonds can be used when targeting cell types rich in peptidases, such as liver cells and synoviocytes.
- 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.
- a degradative agent or condition
- the candidate cleavable linking group for the ability to resist cleavage in the blood or when in contact with other non-target tissue.
- the evaluations can be carried out in cell free systems, in cells, in cell culture, in organ or tissue culture, or in whole animals.
- useful candidate compounds are cleaved 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 serum (or under in vitro conditions selected to mimic extracellular conditions).
- 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-).
- 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.
- 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.
- candidate compounds are cleaved by at most about 10% in the blood.
- 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.
- 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.
- phosphate-based linking groups are -0-P(0)(ORk)-0-, -0-P(S)(ORk)-0- , -0-P(S)(SRk)-0-, -S-P(0)(ORk)-0-, -0-P(0)(ORk)-S-, -S-P(0)(ORk)-S-, -0- P(S)(ORk)-S-, -S-P(S)(ORk)-0-, -0-P(0)(Rk)-0-, -0-P(S)(Rk)-0-, -S-P(0)(Rk)-0-, -S-P(0)(Rk)(Rk)-0-, -S-P(0)(Rk)-S-, -0P(S)( Rk)-S-.
- Preferred embodiments are -0- P(0)(OH)-0-, -0-P(S)(OH)-0-, -0-P(S)(SH)-0-, -S-P(0)(OH)-0-, -0-P(0)(OH)-S-, -S-P(0)(OH)-S-, -0-P(S)(OH)-S-, -S-P(S)(OH)-0-, -0- ⁇ (0)( ⁇ )-0-, -0-P(S)(H)-0-, - S-P(0)(H)-0, -S-P(S)(H)-0-, -S-P(0)(H)-S-, -0-P(S)(H)-S-.
- embodiment is -0-P(0)(OH)-0-. These candidates can be evaluated using methods analogous to those described above.
- a cleavable linker comprises an acid cleavable linking group.
- An acid cleavable linking group is a linking group that is cleaved under acidic conditions.
- acid cleavable linking groups are cleaved in an acidic environment with a pH of about 6.5 or lower (e.g. , about 6.0, 5.75, 5.5, 5.25, 5.0, or lower), or by agents such as enzymes that can act as a general acid.
- specific low pH organelles such as endosomes and lysosomes can provide a cleaving environment for acid cleavable linking groups.
- Acid cleavable linking groups include but are not limited to hydrazones, esters, and esters of amino acids.
- a preferred 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.
- 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(0)0-, or -OC(O)-. These candidates can be evaluated using methods analogous to those described above.
- 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 - NHCHRAC(0)NHCHRBC(0)-, where RA and RB are the R groups of the two adjacent amino acids. These candidates can be evaluated using methods analogous to those described above.
- an iRNA of the invention is conjugated to a carbohydrate through a linker.
- iRNA carbohydrate conjugates with linkers of the compositions and methods of the invention include, but are not limited to,
- a ligand is one or more "GalNAc" (N-acetylgalactosamine) derivatives attached through a bivalent or trivalent branched linker.
- 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 (XXXII) - (XXXV):
- 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;
- p2A p2B p3A p3B p4A p4B p5A p5B p5C r 2A r 2B r 3A r 3B r 4A r 4B r 4A r 5B r 5C are each independently for each occurrence absent, CO, NH, O, S, OC(O), NHC(O), CH 2 , CH 2 NH or CH 2 0;
- R R2 2 A A , R R2 2 B B , R R3 3 A A , R 3B , R 4A , R 4B , R 5A , R 5B , R 5C are each independently for each occurrence absent, NH, O, S, CH 2 , C(0)0, C(0)NH, NHCH(R a )C(0), -C(0)-CH(R a )-
- 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 (XXXV):
- L , L and L represent a monosaccharide, such as GalNAc derivative.
- 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.
- RNA conjugates include, but are not limited to, U.S. Pat. Nos. 4,828,979; 4,948,882; 5,218,105;
- the present invention also includes iRNA compounds that are chimeric compounds.
- iRNA compounds preferably dsRNAs, which 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.
- dsRNAs 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, and/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.
- 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.
- RNA target can be routinely detected by gel electrophoresis and, if necessary, associated nucleic acid hybridization techniques known in the art.
- the RNA of an iRNA can be modified by a non-ligand group.
- 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.
- a thioether e.g., hexyl-S-tritylthiol
- a thiocholesterol Olet 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).
- RNA conjugates Representative United States patents that teach the preparation of such RNA conjugates have been listed above. Typical conjugation protocols involve the synthesis of an 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.
- 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 having a disease, disorder or condition associated with HDV infection) can be achieved in a number of different ways.
- 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.
- in vivo delivery may be performed indirectly by administering one or more vectors that encode and direct the expression of the iRNA.
- any method of delivering a nucleic acid molecule can be adapted for use with an iRNA of the invention (see e.g., Akhtar S. and Julian RL. (1992) Trends Cell. Biol. 2(5): 139-144 and WO94/02595, which are incorporated herein by reference in their entireties).
- 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
- iRNA vascular endothelial growth factor
- local administration for example, by direct injection or implantation into a tissue or topically administering the preparation.
- Local administration to a treatment site maximizes local concentration of the agent, limits the exposure of the agent to systemic tissues that can otherwise be harmed by the agent or that can degrade the agent, and permits a lower total dose of the iRNA molecule to be administered.
- Several studies have shown successful knockdown of gene products when an iRNA is administered locally. For example, intraocular delivery of a VEGF dsRNA by intravitreal injection in cynomolgus monkeys
- mice Tolentino, MJ., et al (2004) Retina 24: 132-138) and subretinal injections in mice (Reich, SJ., et al (2003) Mol. Vis. 9:210-216) were both shown to prevent
- 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, PH., et al (2005) Gene Ther.
- the RNA can be modified or alternatively delivered using a drug delivery system; both methods act to prevent the rapid degradation of the dsRNA by endo- and exo-nucleases in vivo. Modification of the RNA or the pharmaceutical carrier can also permit targeting of the iRNA composition 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.
- 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). Conjugation of an iRNA to an aptamer has been shown to inhibit tumor growth and mediate tumor regression in a mouse model of prostate cancer (McNamara, JO., et al (2006) Nat. Biotechnol. 24: 1005-1015).
- 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 SH., et al (2008) Journal of Controlled Release 129(2): 107-116) that encases an iRNA.
- 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, DR., et al (2003) J. Mol. Biol 327:761-766; Verma, UN., et al (2003) Clin. Cancer Res. 9: 1291-1300; Arnold, AS et al (2007) J. Hypertens. 25: 197-205, which are incorporated herein by reference in their entirety).
- DOTAP Disposon-based lipid particles
- Oligofectamine "solid nucleic acid lipid particles”
- cardiolipin Cholipin, PY., et al (2006) Cancer Gene Ther. 12:321-328; Pal, A., et al (2005) Int J. Oncol. 26: 1087-1091
- polyethyleneimine Bonnet ME., et al (2008) Pharm. Res. Aug 16 Epub ahead of print; Aigner, A. (2006) J. Biomed.
- an iRNA forms a complex with cyclodextrin for systemic administration.
- compositions of iRNAs and cyclodextrins can be found in U.S. Patent No. 7,427,605, which is herein incorporated by reference in its entirety.
- iRNA targeting the HDV 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.
- 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.
- 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).
- the individual strand or strands of an iRNA can be transcribed from a promoter on an expression vector.
- two separate expression vectors can be co- introduced (e.g., by transfection or infection) into a target cell.
- each individual strand of a dsRNA can be transcribed by promoters both of which are located on the same expression plasmid.
- a dsRNA is expressed as inverted repeat polynucleotides joined by a linker polynucleotide sequence such that the dsRNA has a stem and loop structure.
- iRNA expression vectors are generally DNA plasmids or viral vectors.
- Expression vectors compatible with eukaryotic cells can be used to produce recombinant constructs for the expression of an iRNA as described herein.
- Eukaryotic cell expression vectors are well known in the art and are available from a number of commercial sources. Typically, such vectors are provided containing convenient restriction sites for insertion of the desired nucleic acid segment. Delivery of iRNA expressing vectors can be systemic, such as by intravenous or intramuscular administration, by administration to target cells ex- planted from the patient followed by reintroduction into the patient, or by any other means that allows for introduction into a desired target cell.
- iRNA expression plasmids can be transfected into target cells as a complex with cationic lipid carriers (e.g., Oligofectamine) or non-cationic lipid-based carriers (e.g., Transit-TKOTM). Multiple lipid transfections for iRNA-mediated knockdowns targeting different regions of a target RNA over a period of a week or more are also contemplated by the invention.
- Successful introduction of vectors into host cells can be monitored using various known methods. For example, transient transfection can be signaled with a reporter, such as a fluorescent marker, such as Green Fluorescent Protein (GFP). Stable transfection of cells ex vivo can be ensured using markers that provide the transfected cell with resistance to specific environmental factors (e.g., antibiotics and drugs), such as hygromycin B resistance.
- a reporter such as a fluorescent marker, such as Green Fluorescent Protein (GFP).
- 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.
- pox virus vectors such as an orthopox, e.g. , vaccinia virus vectors or avipox, e.g.
- the constructs can include viral sequences for transfection, if desired.
- 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 further described below.
- Vectors useful for the delivery of an iRNA will include regulatory elements (promoter, enhancer, etc.) sufficient for expression of the iRNA in the desired target cell or tissue.
- the regulatory elements can be chosen to provide either constitutive or regulated/inducible expression.
- Expression of the iRNA can be precisely regulated, for example, by using an inducible regulatory sequence that is sensitive to certain physiological regulators, e.g., circulating glucose levels, or hormones (Docherty et al., 1994, FASEB J. 8:20-24).
- inducible expression systems suitable for the control of dsRNA expression in cells or in mammals include, for example, regulation by ecdysone, by estrogen, progesterone, tetracycline, chemical inducers of dimerization, and isopropyl-beta-Dl - thiogalactopyranoside (IPTG).
- IPTG isopropyl-beta-Dl - thiogalactopyranoside
- Viral vectors that contain nucleic acid sequences encoding an iRNA can be used.
- a retroviral vector can be used (see Miller et al., Meth. Enzymol. 217:581-599 (1993)). These retroviral vectors contain the components necessary for the correct packaging of the viral genome and integration into the host cell DNA.
- the nucleic acid sequences encoding an iRNA are cloned into one or more vectors, which facilitate delivery of the nucleic acid into a patient. More detail about retroviral vectors can be found, for example, in Boesen et al. , Biotherapy 6:291-302 (1994), which describes the use of a retroviral vector to deliver the mdrl gene to
- hematopoietic stem cells in order to make the stem cells more resistant to
- Lentiviral vectors contemplated for use include, for example, the HIV based vectors described in U.S. Patent Nos. 6,143,520; 5,665,557; and 5,981,276, which are herein incorporated by reference.
- Adenoviruses are also contemplated for use in delivery of iRNAs of the invention.
- Adenoviruses are especially attractive vehicles, e.g., for delivering genes to respiratory epithelia. Adenoviruses naturally infect respiratory epithelia where they cause a mild disease. Other targets for adenovirus-based delivery systems are liver, the central nervous system, endothelial cells, and muscle. Adenoviruses have the advantage of being capable of infecting non-dividing cells. Kozarsky and Wilson, Current Opinion in Genetics and Development 3:499-503 (1993) present a review of adenovirus-based gene therapy.
- a suitable AV vector for expressing an iRNA featured in the invention a method for constructing the recombinant AV vector, and a method for delivering the vector into target cells, are described in Xia H et al. (2002), Nat. Biotech. 20: 1006-1010.
- Adeno-associated virus (AAV) vectors may also be used to delivery an iRNA of the invention (Walsh et al, Proc. Soc. Exp. Biol. Med. 204:289-300 (1993); U.S. Pat. No. 5,436,146).
- the iRNA can be expressed as two separate, complementary single- stranded RNA molecules from a recombinant AAV vector having, for example, either the U6 or HI RNA promoters, or the cytomegalovirus (CMV) promoter.
- CMV cytomegalovirus
- Suitable AAV vectors for expressing the dsRNA featured in the invention methods for constructing the recombinant AV vector, and methods for delivering the vectors into target cells are described in Samulski R et al. (1987), J. Virol. 61: 3096-3101; Fisher K J et al. (1996), /. Virol, 70: 520-532; Samulski R et al. (1989), /. Virol. 63: 3822-3826; U.S. Pat. No. 5,252,479; U.S. Pat. No. 5,139,941; International Patent Application No. WO 94/13788; and International Patent
- a pox virus such as a vaccinia virus, for example an attenuated vaccinia such as Modified Virus Ankara (MVA) or NYVAC, an avipox such as fowl pox or canary pox.
- a pox virus such as a vaccinia virus, for example an attenuated vaccinia such as Modified Virus Ankara (MVA) or NYVAC, an avipox such as fowl pox or canary pox.
- viral vectors can be modified by pseudotyping the vectors with envelope proteins or other surface antigens from other viruses, or by substituting different viral capsid proteins, as appropriate.
- lentiviral vectors can be pseudotyped with surface proteins from vesicular stomatitis virus (VSV), rabies, Ebola, Mokola, and the like.
- AAV vectors can be made to target different cells by engineering the vectors to express different capsid protein serotypes; see, e.g., Rabinowitz J E et al. (2002), / Virol 76:791-801, the entire disclosure of which is herein incorporated by reference.
- the pharmaceutical preparation of a vector can include the vector in an acceptable diluent, or can include a slow release matrix in which the gene delivery vehicle is imbedded.
- the pharmaceutical preparation can include one or more cells which produce the gene delivery system.
- the present invention also includes pharmaceutical compositions and formulations which include the iRNAs of the invention.
- pharmaceutical compositions containing an iRNA, as described herein, and a pharmaceutically acceptable carrier are useful for treating a disease or disorder associated with the expression or activity of an HDV gene.
- Such pharmaceutical compositions are formulated based on the mode of delivery.
- compositions that are formulated for direct delivery into the brain parenchyma, e.g., by infusion into the brain, such as by continuous pump infusion.
- the pharmaceutical compositions of the invention may be administered in dosages sufficient to inhibit expression of an HDV gene.
- an iRNA agent of the invention is administered to a subject as a weight-based dose.
- a "weight-based dose” e.g., a dose in mg/kg
- an iRNA agent is administered to a subject as a fixed dose.
- a "fixed dose” e.g., a dose in mg
- a fixed dose of an iRNA agent of the invention is based on a predetermined weight or age.
- 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.
- the dsRNA can be administered at about 0.01 mg/kg, about 0.05 mg/kg, about 0.5 mg/kg, about 1 mg/kg, about 1.5 mg/kg, about 2 mg/kg, about 3 mg/kg, about 10 mg/kg, about 20 mg/kg, about 30 mg/kg, about 40 mg/kg, or about 50 mg/kg per single dose.
- the dsRNA may be administered at a dose of about 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9,
- the dsRNA is administered at a dose of about 0.1 to about 50 mg/kg, about 0.25 to about 50 mg/kg, about 0.5 to about 50 mg/kg, about 0.75 to about 50 mg/kg, about 1 to about 50 mg/kg, about 1.5 to about 50 mg/kg, about 2 to about 50 mg/kg, about 2.5 to about 50 mg/kg, about 3 to about 50 mg/kg, about 3.5 to about 50 mg/kg, about 4 to about 50 mg/kg, about 4.5 to about 50 mg/kg, about 5 to about 50 mg/kg, about 7.5 to about 50 mg/kg, about 10 to about 50 mg/kg, about 15 to about 50 mg/kg, about 20 to about 50 mg/kg, about 20 to about 50 mg/kg, about 25 to about 50 mg/kg, about 25 to about 50 mg/kg, about 30 to about 50 mg/kg, about 35 to about 50 mg/kg, about 40 to about 50 mg/kg, about 45 to about 50 mg/kg, about 0.1 to about 45 mg/kg, about 0.25 to about 45
- the dsRNA may be administered at a dose of about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7,
- the dsRNA is administered at a dose of about 0.5 to about 50 mg/kg, about 0.75 to about 50 mg/kg, about 1 to about 50 mg/kg, about 1.5 to about 50 mg/kg, about 2 to about 50 mg/kg, about 2.5 to about 50 mg/kg, about 3 to about 50 mg/kg, about 3.5 to about 50 mg/kg, about 4 to about 50 mg/kg, about 4.5 to about 50 mg/kg, about 5 to about 50 mg/kg, about 7.5 to about 50 mg/kg, about 10 to about 50 mg/kg, about 15 to about 50 mg/kg, about 20 to about 50 mg/kg, about 20 to about 50 mg/kg, about 25 to about 50 mg/kg, about 25 to about 50 mg/kg, about 30 to about 50 mg/kg, about 35 to about 50 mg/kg, about 40 to about 50 mg/kg, about 45 to about 50 mg/kg, about 0.5 to about 45 mg/kg, about 0.75 to about 45 mg/kg, about 1 to about 45 mg/kg, about 1.5 to about 45 mg/kg, about
- subjects can be administered, e.g., subcutaneously,
- a single therapeutic amount of iRNA such as about 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.525, 0.55, 0.575, 0.6, 0.625, 0.65, 0.675, 0.7, 0.725, 0.75, 0.775, 0.8, 0.825, 0.85, 0.875, 0.9, 0.925, 0.95, 0.975, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5,
- subjects are administered, e.g., subcutaneously, intramuscularly, or intravenously, multiple doses of a therapeutic amount of iRNA, such as a dose about 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.525, 0.55, 0.575, 0.6, 0.625, 0.65, 0.675, 0.7, 0.725, 0.75, 0.775, 0.8, 0.825, 0.85, 0.875, 0.9, 0.925, 0.95, 0.975, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1,
- subjects are administered, e.g., subcutaneously, intramuscularly, or intravenously, a repeat dose of a therapeutic amount of iRNA, such as a dose about 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.525, 0.55, 0.575, 0.6, 0.625, 0.65, 0.675, 0.7, 0.725, 0.75, 0.775, 0.8, 0.825, 0.85, 0.875, 0.9, 0.925, 0.95, 0.975, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1
- a composition of the invention comprises a dsRNA as described herein and a lipid
- subjects can be administered a therapeutic amount of iRNA, such as about 0.01 mg/kg to about 5 mg/kg, about 0.01 mg/kg to about 10 mg/kg, about 0.05 mg/kg to about 5 mg/kg, about 0.05 mg/kg to about 10 mg/kg, about 0.1 mg/kg to about 5 mg/kg, about 0.1 mg/kg to about 10 mg/kg, about 0.2 mg/kg to about 5 mg/kg, about 0.2 mg/kg to about 10 mg/kg, about 0.3 mg/kg to about 5 mg/kg, about 0.3 mg/kg to about 10 mg/kg, about 0.4 mg/kg to about 5 mg/kg, about 0.4 mg/kg to about 10 mg/kg, about 0.5 mg/kg to about 5 mg/kg, about 0.5 mg/kg to about 10 mg/kg, about 1 mg/kg to about 5 mg/kg, about 1 mg/kg to about 10 mg/kg, about 1.5
- the dsRNA may be administered at a dose of about 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9,
- RNAi agent when a double- stranded RNAi agent includes a modification (e.g., one or more motifs of three identical modifications on three consecutive nucleotides), including one such motif at or near the cleavage site of the agent, six phosphorothioate linkages, and a ligand, such an agent is administered at a dose of about 0.01 to about 0.5 mg/kg, about 0.01 to about 0.4 mg/kg, about 0.01 to about 0.3 mg/kg, about 0.01 to about 0.2 mg/kg, about 0.01 to about 0.1 mg/kg, about 0.01 mg/kg to about 0.09 mg/kg, about 0.01 mg/kg to about 0.08 mg/kg, about 0.01 mg/kg to about 0.07 mg/kg, about 0.01 mg/kg to about 0.06 mg/kg, about 0.01 mg/kg to about 0.05 mg/kg, about 0.02 to about 0.5 mg/kg, about 0.02 to about 0.4 mg/kg, about 0.02 to about 0.3 mg/kg,
- the RNAi agent e.g. , RNAi agent in a pharmaceutical composition
- the RNAi agent is administered as a fixed dose of between about 100 mg to about 900 mg, e.g., between about 100 mg to about 850 between about 100 mg to about 800 mg, between about 100 mg to about 750 mg, between about 100 mg to about 700 mg, between about 100 mg to about 650 mg, between about 100 mg to about 600 mg, between about 100 mg to about 550 mg, between about 100 mg to about 500 mg, between about 200 mg to about 850 mg, between about 200 mg to about 800 mg, between about 200 mg to about 750 mg, between about 200 mg to about 700 mg, between about 200 mg to about 650 mg, between about 200 mg to about 600 mg, between about 200 mg to about 550 mg, between about 200 mg to about 500 mg, between about 300 mg to about 850 mg, between about 300 mg to about 800 mg, between about 300 mg to about 750 mg, between about 300 mg to about 700 mg, between about 300 mg to about 650 mg, between about 300 mg to about 600 mg, between about 300 mg to about 550 mg, between about 300 mg to about 500 mg
- the RNAi agent is administered as a fixed dose of about 100 mg, about 125 mg, about 150 mg, about 175 mg, 200 mg, about 225 mg, about 250 mg, about 275 mg, about 300 mg, about 325 mg, about 350 mg, about 375 mg, about 400 mg, about 425 mg, about 450 mg, about 475 mg, about 500 mg, about 525 mg, about 550 mg, about 575 mg, about 600 mg, about 625 mg, about 650 mg, about 675 mg, about 700 mg, about 725 mg, about 750 mg, about 775 mg, about 800 mg, about 825 mg, about 850 mg, about 875 mg, or about 900 mg.
- the pharmaceutical composition can be administered by intravenous infusion over a period of time, such as over a 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, and 21, 22, 23, 24, or about a 25 minute period.
- the administration may be repeated, for example, on a regular basis, such as weekly, biweekly (i.e., every two weeks) for one month, two months, three months, four months or longer.
- the treatments can be administered on a less frequent basis. For example, after administration weekly or biweekly for three months,
- administration can be repeated once per month, for six months or a year or longer.
- the pharmaceutical composition can be administered once daily, or the iRNA can be administered as two, three, or more sub-doses at appropriate intervals throughout the day or even using continuous infusion or delivery through a controlled release formulation. In that case, the iRNA contained in each sub-dose must be correspondingly smaller in order to achieve the total daily dosage.
- the dosage unit can also be compounded for delivery over several days, e.g., using a conventional sustained release formulation which provides sustained release of the iRNA over a several day period. Sustained release formulations are well known in the art and are particularly useful for delivery of agents at a particular site, such as could be used with the agents of the present invention. In this embodiment, the dosage unit contains a corresponding multiple of the daily dose.
- a single dose of the pharmaceutical compositions can be long lasting, such that subsequent doses are administered at not more than 3, 4, or 5 day intervals, or at not more than 1, 2, 3, or 4 week intervals.
- a single dose of the pharmaceutical compositions of the invention is administered once per week.
- a single dose of the pharmaceutical compositions of the invention is administered bi-monthly.
- a single dose of the pharmaceutical compositions of the invention is administered once per month, once every other month, or once quarterly (i.e., every three months).
- treatment of a subject with a therapeutically effective amount of a composition can include a single treatment or a series of treatments.
- Estimates of effective dosages and in vivo half-lives for the individual iRNAs encompassed by the invention can be made using conventional methodologies or on the basis of in vivo testing using an appropriate animal model, as described elsewhere herein.
- compositions of the present invention can be administered in a number of ways depending upon whether local or systemic treatment is desired and upon the area to be treated.
- Administration can be topical (e.g., by a transdermal patch), pulmonary, e.g., by inhalation or insufflation of powders or aerosols, including by nebulizer; intratracheal, intranasal, epidermal and transdermal, oral or parenteral.
- Parenteral administration includes intravenous, intraarterial, subcutaneous, intraperitoneal or intramuscular injection or infusion; subdermal, e.g., via an implanted device; or intracranial, e.g., by intraparenchymal, intrathecal or
- the iRNA can be delivered in a manner to target a particular tissue, such as the liver (e.g., the hepatocytes of the liver).
- a particular tissue such as the liver (e.g., the hepatocytes of the liver).
- compositions and formulations for topical administration can include transdermal patches, ointments, lotions, creams, gels, drops, suppositories, sprays, liquids and powders.
- Conventional pharmaceutical carriers, aqueous, powder or oily bases, thickeners and the like can be necessary or desirable.
- Coated condoms, gloves and the like can also be useful.
- Suitable topical formulations include those in which the iRNAs featured in the invention are in admixture with a topical delivery agent such as lipids, liposomes, fatty acids, fatty acid esters, steroids, chelating agents and surfactants.
- Suitable lipids and liposomes include neutral (e.g.,
- dioleoylphosphatidyl DOPE ethanolamine dimyristoylphosphatidyl choline DMPC, distearolyphosphatidyl choline) negative (e.g., dimyristoylphosphatidyl glycerol DMPG) and cationic (e.g., dioleoyltetramethylaminopropyl DOTAP and
- iRNAs featured in the invention can be encapsulated within liposomes or can form complexes thereto, in particular to cationic liposomes.
- iRNAs can be complexed to lipids, in particular to cationic lipids.
- Suitable fatty acids and esters include but are not limited to arachidonic acid, oleic acid, eicosanoic acid, lauric acid, caprylic acid, capric acid, myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid, dicaprate, tricaprate, monoolein, dilaurin, glyceryl 1-monocaprate, l-dodecylazacycloheptan-2-one, an acylcarnitine, an acylcholine, or a C 1-2 o alkyl ester (e.g., isopropylmyristate IPM), monoglyceride, diglyceride or pharmaceutically acceptable salt thereof).
- Topical formulations are described in detail in U.S. Patent No. 6,747,014, which is incorporated herein by reference.
- iRNA Formulations Comprising Membranous Molecular Assemblies
- An iRNA for use in the compositions and methods of the invention can be formulated for delivery in a membranous molecular assembly, e.g., a liposome or a micelle.
- liposome refers to a vesicle composed of amphiphilic lipids arranged in at least one bilayer, e.g., one bilayer or a plurality of bilayers. Liposomes include unilamellar and multilamellar vesicles that have a membrane formed from a lipophilic material and an aqueous interior. The aqueous portion contains the iRNA composition.
- the lipophilic material isolates the aqueous interior from an aqueous exterior, which typically does not include the iRNA composition, although in some examples, it may.
- Liposomes are useful for the transfer and delivery of active ingredients to the site of action. Because the liposomal membrane is structurally similar to biological membranes, when liposomes are applied to a tissue, the liposomal bilayer fuses with bilayer of the cellular membranes. As the merging of the liposome and cell progresses, the internal aqueous contents that include the iRNA are delivered into the cell where the iRNA can specifically bind to a target RNA and can mediate iRNA. In some cases the liposomes are also specifically targeted, e.g., to direct the iRNA to particular cell types.
- a liposome containing an iRNA agent can be prepared by a variety of methods.
- the lipid component of a liposome is dissolved in a detergent so that micelles are formed with the lipid component.
- the lipid component can be an amphipathic cationic lipid or lipid conjugate.
- the detergent can have a high critical micelle concentration and may be nonionic.
- Exemplary detergents include cholate, CHAPS, octylglucoside, deoxycholate, and lauroyl sarcosine.
- the iRNA agent preparation is then added to the micelles that include the lipid component.
- the cationic groups on the lipid interact with the iRNA agent and condense around the iRNA agent to form a liposome.
- the detergent is removed, e.g., by dialysis, to yield a liposomal preparation of iRNA agent.
- a carrier compound that assists in condensation can be added during the condensation reaction, e.g., by controlled addition.
- the carrier compound can be a polymer other than a nucleic acid (e.g., spermine or spermidine). pH can also adjusted to favor condensation.
- Liposome formation can also include one or more aspects of exemplary methods described in Feigner, P. L. et al., Proc. Natl. Acad. Set, USA 8:7413-7417, 1987; U.S. Pat. No. 4,897,355; U.S. Pat. No. 5,171,678; Bangham, et al. M. Mol. Biol. 23:238, 1965; Olson, et al. Biochim. Biophys. Acta 557:9, 1979; Szoka, et al. Proc. Natl. Acad. Sci. 75: 4194, 1978; Mayhew, et al.
- Liposomes fall into two broad classes. Cationic liposomes are positively charged liposomes which interact with the negatively charged nucleic acid molecules to form a stable complex. The positively charged nucleic acid/liposome complex binds to the negatively charged cell surface and is internalized in an endosome. Due to the acidic pH within the endosome, the liposomes are ruptured, releasing their contents into the cell cytoplasm (Wang et al., Biochem. Biophys. Res. Commun., 1987, 147, 980-985).
- Liposomes which are pH-sensitive or negatively-charged, entrap nucleic acids rather than complex with it. Since both the nucleic acid and the lipid are similarly charged, repulsion rather than complex formation occurs. Nevertheless, some nucleic acid is entrapped within the aqueous interior of these liposomes. pH-sensitive liposomes have been used to deliver nucleic acids encoding the thymidine kinase gene to cell monolayers in culture. Expression of the exogenous gene was detected in the target cells (Zhou et al., Journal of Controlled Release, 1992, 19, 269-274).
- One major type of liposomal composition includes phospholipids other than naturally-derived phosphatidylcholine.
- Neutral liposome compositions can be formed from dimyristoyl phosphatidylcholine (DMPC) or dipalmitoyl phosphatidylcholine (DPPC).
- Anionic liposome compositions generally are formed from dimyristoyl phosphatidylglycerol, while anionic fusogenic liposomes are formed primarily from dioleoyl phosphatidylethanolamine (DOPE).
- DOPE dioleoyl phosphatidylethanolamine
- Another type of liposomal composition is formed from phosphatidylcholine (PC) such as, for example, soybean PC, and egg PC.
- PC phosphatidylcholine
- Another type is formed from mixtures of phospholipid and/or phosphatidylcholine and/or cholesterol.
- Non-ionic liposomal systems have also been examined to determine their utility in the delivery of drugs to the skin, in particular systems comprising non-ionic surfactant and cholesterol.
- Non-ionic liposomal formulations comprising
- NovasomeTM I glyceryl dilaurate/cholesterol/polyoxyethylene-10-stearyl ether
- NovasomeTM II glyceryl distearate/cholesterol/polyoxyethylene-10-stearyl ether
- Liposomes also include "sterically stabilized" liposomes, a term which, as used herein, refers to liposomes comprising one or more specialized lipids that, when incorporated into liposomes, result in enhanced circulation lifetimes relative to liposomes lacking such specialized lipids.
- sterically stabilized liposomes are those in which part of the vesicle-forming lipid portion of the liposome (A) comprises one or more glycolipids, such as mono sialoganglio side G M I, or (B) is derivatized with one or more hydrophilic polymers, such as a polyethylene glycol (PEG) moiety.
- PEG polyethylene glycol
- sphingomyelin and (2) the ganglioside G M I or a galactocerebroside sulfate ester.
- U.S. Pat. No. 5,543,152 discloses liposomes comprising sphingomyelin. Liposomes comprising 1,2-sn-dimyristoylphosphatidylcholine are disclosed in WO 97/13499 (Lim et al).
- cationic liposomes are used.
- Cationic liposomes possess the advantage of being able to fuse to the cell membrane.
- Non-cationic liposomes although not able to fuse as efficiently with the plasma membrane, are taken up by macrophages in vivo and can be used to deliver iRNA agents to macrophages.
- liposomes obtained from natural phospholipids are biocompatible and biodegradable; liposomes can incorporate a wide range of water and lipid soluble drugs; liposomes can protect encapsulated iRNA agents in their internal compartments from metabolism and degradation (Rosoff, in "Pharmaceutical Dosage Forms," Lieberman, Rieger and Banker (Eds.), 1988, volume 1, p. 245).
- Important considerations in the preparation of liposome formulations are the lipid surface charge, vesicle size and the aqueous volume of the liposomes.
- a positively charged synthetic cationic lipid, N-[l-(2,3-dioleyloxy)propyl]- ⁇ , ⁇ , ⁇ -trimethylammonium chloride can be used to form small liposomes that interact spontaneously with nucleic acid to form lipid-nucleic acid complexes which are capable of fusing with the negatively charged lipids of the cell membranes of tissue culture cells, resulting in delivery of iRNA agent (see, e.g., Feigner, P. L. et al., Proc. Natl. Acad. Sci., USA 8:7413-7417, 1987 and U.S. Pat. No. 4,897,355 for a description of DOTMA and its use with DNA).
- DOTMA synthetic cationic lipid, N-[l-(2,3-dioleyloxy)propyl]- ⁇ , ⁇ , ⁇ -trimethylammonium chloride
- a DOTMA analogue, l,2-bis(oleoyloxy)-3-(trimethylammonia)propane (DOTAP) can be used in combination with a phospholipid to form DNA-complexing vesicles.
- LipofectinTM Bethesda Research Laboratories, Gaithersburg, Md. is an effective agent for the delivery of highly anionic nucleic acids into living tissue culture cells that comprise positively charged DOTMA liposomes which interact spontaneously with negatively charged polynucleotides to form complexes. When enough positively charged liposomes are used, the net charge on the resulting complexes is also positive.
- DOTAP cationic lipid, l,2-bis(oleoyloxy)-3,3- (trimethylammonia)propane
- cationic lipid compounds include those that have been conjugated to a variety of moieties including, for example, carboxyspermine which has been conjugated to one of two types of lipids and includes compounds such as 5- carboxyspermylglycine dioctaoleoylamide (“DOGS”) (TransfectamTM, Promega, Madison, Wisconsin) and dipalmitoylphosphatidylethanolamine 5-carboxyspermyl- amide (“DPPES”) (see, e.g., U.S. Pat. No. 5,171,678).
- DOGS 5- carboxyspermylglycine dioctaoleoylamide
- DPES dipalmitoylphosphatidylethanolamine 5-carboxyspermyl- amide
- Another cationic lipid conjugate includes derivatization of the lipid with cholesterol ("DC-Choi") which has been formulated into liposomes in combination with DOPE (See, Gao, X. and Huang, L., Biochim. Biophys. Res. Commun. 179:280, 1991). Lipopolylysine, made by conjugating polylysine to DOPE, has been reported to be effective for transfection in the presence of serum (Zhou, X. et al., Biochim. Biophys. Acta 1065:8, 1991). For certain cell lines, these liposomes containing conjugated cationic lipids, are said to exhibit lower toxicity and provide more efficient transfection than the DOTMA-containing compositions.
- cationic lipids suitable for the delivery of oligonucleotides are described in WO 98/39359 and WO 96/37194.
- Liposomes are used for delivering iRNA agent to epidermal cells and also to enhance the penetration of iRNA agent into dermal tissues, e.g., into skin.
- the liposomes can be applied topically. Topical delivery of drugs formulated as liposomes to the skin has been documented (see, e.g., Weiner et al., Journal of Drug Targeting, 1992, vol.
- Non-ionic liposomal systems have also been examined to determine their utility in the delivery of drugs to the skin, in particular systems comprising non-ionic surfactant and cholesterol.
- Non-ionic liposomal formulations comprising Novasome I (glyceryl dilaurate/cholesterol/polyoxyethylene-10-stearyl ether) and Novasome II (glyceryl distearate/ cholesterol/polyoxyethylene-10-stearyl ether) were used to deliver a drug into the dermis of mouse skin.
- Such formulations with iRNA agent are useful for treating a dermatological disorder.
- Liposomes that include iRNA can be made highly deformable. Such deformability can enable the liposomes to penetrate through pore that are smaller than the average radius of the liposome.
- transfersomes are a type of deformable liposomes.
- Transferosomes can be made by adding surface edge activators, usually surfactants, to a standard liposomal composition. Transfersomes that include iRNA agent can be delivered, for example, subcutaneously by infection in order to deliver iRNA agent to keratinocytes in the skin. In order to cross intact mammalian skin, lipid vesicles must pass through a series of fine pores, each with a diameter less than 50 nm, under the influence of a suitable transdermal gradient. In addition, due to the lipid properties, these transferosomes can be self-optimizing (adaptive to the shape of pores, e.g., in the skin), self-repairing, and can frequently reach their targets without fragmenting, and often self-loading.
- surface edge activators usually surfactants
- Transfersomes are yet another type of liposomes, and are highly deformable lipid aggregates which are attractive candidates for drug delivery vehicles.
- Transfersomes can be described as lipid droplets which are so highly deformable that they are easily able to penetrate through pores which are smaller than the droplet. Transfersomes are adaptable to the environment in which they are used, e.g., they are self-optimizing (adaptive to the shape of pores in the skin), self-repairing, frequently reach their targets without fragmenting, and often self-loading.
- Transfersomes it is possible to add surface edge- activators, usually surfactants, to a standard liposomal composition. Transfersomes have been used to deliver serum albumin to the skin. The transfersome-mediated delivery of serum albumin has been shown to be as effective as subcutaneous injection of a solution containing serum albumin.
- HLB hydrophile/lipophile balance
- Nonionic surfactants find wide application in pharmaceutical and cosmetic products and are usable over a wide range of pH values. In general their HLB values range from 2 to about 18 depending on their structure.
- Nonionic surfactants include nonionic esters such as ethylene glycol esters, propylene glycol esters, glyceryl esters, polyglyceryl esters, sorbitan esters, sucrose esters, and ethoxylated esters.
- Nonionic alkanolamides and ethers such as fatty alcohol ethoxylates, propoxylated alcohols, and ethoxylated/propoxylated block polymers are also included in this class.
- the polyoxyethylene surfactants are the most popular members of the nonionic surfactant class.
- Anionic surfactants include carboxylates such as soaps, acyl lactylates, acyl amides of amino acids, esters of sulfuric acid such as alkyl sulfates and ethoxylated alkyl sulfates, sulfonates such as alkyl benzene sulfonates, acyl isethionates, acyl taurates and sulfosuccinates, and phosphates.
- the most important members of the anionic surfactant class are the alkyl sulfates and the soaps.
- Cationic surfactants include quaternary ammonium salts and ethoxylated amines. The quaternary ammonium salts are the most used members of this class.
- amphoteric surfactants include acrylic acid derivatives, substituted alkylamides, N-alkylbetaines and phosphatides.
- RNA for use in the methods of the invention can also be provided as micellar formulations.
- micellar formulations are defined herein as a particular type of molecular assembly in which amphipathic molecules are arranged in a spherical structure such that all the hydrophobic portions of the molecules are directed inward, leaving the hydrophilic portions in contact with the surrounding aqueous phase. The converse arrangement exists if the environment is hydrophobic.
- a mixed micellar formulation suitable for delivery through transdermal membranes may be prepared by mixing an aqueous solution of the siRNA
- composition an alkali metal to C 22 alkyl sulphate, and a micelle forming compounds.
- exemplary micelle forming compounds include lecithin, hyaluronic acid, pharmaceutically acceptable salts of hyaluronic acid, glycolic acid, lactic acid, chamomile extract, cucumber extract, oleic acid, linoleic acid, linolenic acid, monoolein, monooleates, monolaurates, borage oil, evening of primrose oil, menthol, trihydroxy oxo cholanyl glycine and pharmaceutically acceptable salts thereof, glycerin, polyglycerin, lysine, polylysine, triolein, polyoxyethylene ethers and analogues thereof, polidocanol alkyl ethers and analogues thereof,
- the micelle forming compounds may be added at the same time or after addition of the alkali metal alkyl sulphate.
- Mixed micelles will form with substantially any kind of mixing of the ingredients but vigorous mixing in order to provide smaller size micelles.
- a first micellar composition which contains the siRNA composition and at least the alkali metal alkyl sulphate.
- the first micellar composition is then mixed with at least three micelle forming compounds to form a mixed micellar composition.
- the micellar composition is prepared by mixing the siRNA composition, the alkali metal alkyl sulphate and at least one of the micelle forming compounds, followed by addition of the remaining micelle forming compounds, with vigorous mixing.
- Phenol and/or m-cresol may be added to the mixed micellar composition to stabilize the formulation and protect against bacterial growth.
- phenol and/or m-cresol may be added with the micelle forming ingredients.
- An isotonic agent such as glycerin may also be added after formation of the mixed micellar composition.
- the formulation can be put into an aerosol dispenser and the dispenser is charged with a propellant.
- the propellant which is under pressure, is in liquid form in the dispenser.
- the ratios of the ingredients are adjusted so that the aqueous and propellant phases become one, i.e., there is one phase. If there are two phases, it is necessary to shake the dispenser prior to dispensing a portion of the contents, e.g., through a metered valve.
- the dispensed dose of pharmaceutical agent is propelled from the metered valve in a fine spray.
- Propellants may include hydrogen-containing chlorofluorocarbons, hydrogen- containing fluorocarbons, dimethyl ether and diethyl ether.
- HFA 134a (1, 1,1,2 tetrafluoroethane) may be used.
- the specific concentrations of the essential ingredients can be determined by relatively straightforward experimentation.
- iRNAs e.g., dsRNAs of in the invention may be fully encapsulated in a lipid formulation, e.g., a LNP, or other nucleic acid-lipid particle.
- LNP refers to a stable nucleic acid-lipid particle.
- LNPs typically contain a cationic lipid, a non-cationic lipid, and a lipid that prevents aggregation of the particle (e.g., a PEG-lipid conjugate).
- LNPs are extremely useful for systemic applications, as they exhibit extended circulation lifetimes following intravenous (i.v.) injection and accumulate at distal sites (e.g., sites physically separated from the administration site).
- LNPs include "pSPLP," which include an encapsulated condensing agent-nucleic acid complex as set forth in PCT Publication No. WO 00/03683.
- the particles of the present invention typically have a mean diameter of about 50 nm to about 150 nm, more typically about 60 nm to about 130 nm, more typically about 70 nm to about 110 nm, most typically about 70 nm to about 90 nm, and are substantially nontoxic.
- the nucleic acids when present in the nucleic acid- lipid particles of the present invention are resistant in aqueous solution to degradation with a nuclease. Nucleic acid-lipid particles and their method of preparation are disclosed in, e.g., U.S. Patent Nos. 5,976,567; 5,981,501 ;
- the lipid to drug ratio (mass/mass ratio) (e.g., lipid to dsRNA ratio) will be in the range of from about 1 : 1 to about 50: 1, from about 1 : 1 to about 25: 1, from about 3: 1 to about 15: 1, from about 4: 1 to about 10: 1, from about 5: 1 to about 9: 1, or about 6: 1 to about 9: 1. Ranges intermediate to the above recited ranges are also contemplated to be part of the invention.
- the cationic lipid can be, for example, N,N-dioleyl-N,N-dimethylammonium chloride (DODAC), N,N-distearyl-N,N-dimethylammonium bromide (DDAB), N-(I - (2,3- dioleoyloxy)propyl)-N,N,N-trimethylammonium chloride (DOTAP), N-(I -(2,3- dioleyloxy)propyl)-N,N,N-trimethylammonium chloride (DOTMA), N,N-dimethyl- 2,3- dioleyloxy)propylamine (DODMA), l,2-DiLinoleyloxy-N,N- dimethylaminopropane (DLinDMA), l,2-Dilinolenyloxy-N,N-dimethylaminopropane (DLenDMA), 1 ,2-Dilinoleylcarbamoyloxy-3-di
- the compound 2,2-Dilinoleyl-4-dimethylaminoethyl- [l,3]-dioxolane can be used to prepare lipid-siRNA nanoparticles. Synthesis of 2,2- Dilinoleyl-4-dimethylaminoethyl-[l,3]-dioxolane is described in United States provisional patent application number 61/107,998 filed on October 23, 2008, which is herein incorporated by reference.
- the lipid-siRNA particle includes 40% 2, 2-Dilinoleyl-4- dimethylaminoethyl-[l,3]-dioxolane: 10% DSPC: 40% Cholesterol: 10% PEG-C- DOMG (mole percent) with a particle size of 63.0 + 20 nm and a 0.027 siRNA/Lipid Ratio.
- the ionizable/non-cationic lipid can be an anionic lipid or a neutral lipid including, but not limited to, distearoylphosphatidylcholine (DSPC), dioleoylphosphatidylcholine (DOPC), dipalmitoylphosphatidylcholine (DPPC), dioleoylphosphatidylglycerol (DOPG), dipalmitoylphosphatidylglycerol (DPPG), dioleoyl-phosphatidylethanolamine (DOPE), palmitoyloleoylphosphatidylcholine (POPC), palmitoyloleoylphosphatidylethanolamine (POPE), dioleoyl- phosphatidylethanolamine 4-(N-maleimidomethyl)-cyclohexane-l- carboxylate (DOPE-mal), dipalmitoyl phosphatidyl ethanolamine (DPPE),
- DSPC distearoy
- the non- cationic lipid can be from about 5 mol % to about 90 mol , about 10 mol , or about 58 mol % if cholesterol is included, of the total lipid present in the particle.
- the conjugated lipid that inhibits aggregation of particles can be, for example, a polyethyleneglycol (PEG)-lipid including, without limitation, a PEG-diacylglycerol (DAG), a PEG-dialkyloxypropyl (DAA), a PEG-phospholipid, a PEG-ceramide (Cer), or a mixture thereof.
- the PEG-DAA conjugate can be, for example, a PEG- dilauryloxypropyl (Ci 2 ), a PEG-dimyristyloxypropyl (Ci 4 ), a PEG- dipalmityloxypropyl (Ci 6 ), or a PEG- distearyloxypropyl (C]s).
- the conjugated lipid that prevents aggregation of particles can be from 0 mol % to about 20 mol % or about 2 mol % of the total lipid present in the particle.
- the nucleic acid-lipid particle further includes cholesterol at, e.g., about 10 mol % to about 60 mol % or about 48 mol % of the total lipid present in the particle.
- the lipidoid ND98-4HC1 (MW 1487) (see U.S. Patent Application No. 12/056,230, filed 3/26/2008, which is incorporated herein by reference), Cholesterol (Sigma- Aldrich), and PEG-Ceramide C16 (Avanti Polar Lipids) can be used to prepare lipid-dsRNA nanoparticles (i.e., LNP01 particles).
- Stock solutions of each in ethanol can be prepared as follows: ND98, 133 mg/ml; Cholesterol, 25 mg/ml, PEG-Ceramide C16, 100 mg/ml.
- the ND98, Cholesterol, and PEG-Ceramide C16 stock solutions can then be combined in a, e.g., 42:48: 10 molar ratio.
- the combined lipid solution can be mixed with aqueous dsRNA (e.g., in sodium acetate pH 5) such that the final ethanol concentration is about 35-45% and the final sodium acetate concentration is about 100-300 mM.
- aqueous dsRNA e.g., in sodium acetate pH 5
- Lipid-dsRNA nanoparticles typically form spontaneously upon mixing.
- the resultant nanoparticle mixture can be extruded through a polycarbonate membrane (e.g., 100 nm cut-off) using, for example, a thermobarrel extruder, such as Lipex Extruder (Northern Lipids, Inc).
- a thermobarrel extruder such as Lipex Extruder (Northern Lipids, Inc).
- the extrusion step can be omitted.
- Ethanol removal and simultaneous buffer exchange can be accomplished by, for example, dialysis or tangential flow filtration.
- Buffer can be exchanged with, for example, phosphate buffered saline (PBS) at about pH 7, e.g., about pH 6.9, about pH 7.0, about pH 7.1, about pH 7.2, about pH 7.3, or about pH
- LNP01 formulations are described, e.g., in International Application
- siRNA - 6 1
- PEG-DMG PEG-didimyristoyl glycerol (C14-PEG, or PEG-C14) (PEG with avg mol wt of 2000)
- PEG-DSG PEG-distyryl glycerol (C18-PEG, or PEG-C18) (PEG with avg mol wt of 2000)
- PEG-cDMA PEG-carbamoyl-l,2-dimyristyloxypropylamine (PEG with avg mol wt of 2000)
- SNALP l,2-Dilinolenyloxy-N,N-dimethylaminopropane (DLinDMA)
- DLinDMA l,2-Dilinolenyloxy-N,N-dimethylaminopropane
- XTC comprising formulations are described, e.g. , in PCT Publication No. WO 2010/088537, the entire contents of which are incorporated herein by reference.
- MC3 comprising formulations are described, e.g., in U.S. Publication No. 2010/0324120, filed June 10, 2010, the entire contents of which are incorporated herein by reference.
- ALNY- 100 comprising formulations are described, e.g., PCT Publication No. WO 2010/054406, the entire contents of which are incorporated herein by reference.
- compositions and formulations for oral administration include powders or granules, microparticulates, nanoparticulates, suspensions or solutions in water or non-aqueous media, capsules, gel capsules, sachets, tablets or minitablets. Thickeners, flavoring agents, diluents, emulsifiers, dispersing aids or binders can be desirable.
- oral formulations are those in which dsRNAs featured in the invention are administered in conjunction with one or more penetration enhancer surfactants and chelators.
- Suitable surfactants include fatty acids and/or esters or salts thereof, bile acids and/or salts thereof.
- Suitable bile acids/salts include
- chenodeoxycholic acid and ursodeoxychenodeoxycholic acid (UDCA)
- cholic acid dehydrocholic acid, deoxycholic acid, glucholic acid, glycholic acid, glycodeoxycholic acid, taurocholic acid, taurodeoxycholic acid, sodium tauro-24,25- dihydro-fusidate and sodium glycodihydrofusidate.
- Suitable fatty acids include arachidonic acid, undecanoic acid, oleic acid, lauric acid, caprylic acid, capric acid, myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid, dicaprate, tricaprate, monoolein, dilaurin, glyceryl 1-monocaprate, l-dodecylazacycloheptan-2- one, an acylcarnitine, an acylcholine, or a monoglyceride, a diglyceride or a pharmaceutically acceptable salt thereof (e.g., sodium).
- arachidonic acid arachidonic acid, undecanoic acid, oleic acid, lauric acid, caprylic acid, capric acid, myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid, dicaprate, tricaprate, monoolein, dilaurin,
- combinations of penetration enhancers are used, for example, fatty acids/salts in combination with bile acids/salts.
- One exemplary combination is the sodium salt of lauric acid, capric acid and UDCA.
- Further penetration enhancers include
- DsRNAs featured in the invention can be delivered orally, in granular form including sprayed dried particles, or complexed to form micro or nanoparticles.
- DsRNA complexing agents include poly-amino acids; polyimines; polyacrylates; polyalkylacrylates,
- polyoxethanes polyalkylcyanoacrylates
- cationized gelatins albumins, starches, acrylates, polyethyleneglycols (PEG) and starches
- polyalkylcyanoacrylates DEAE- derivatized polyimines, pollulans, celluloses and starches.
- Suitable complexing agents include chitosan, N-trimethylchitosan, poly-L-lysine, polyhistidine, polyornithine, polyspermines, protamine, polyvinylpyridine, polythiodiethylaminomethylethylene P(TDAE), polyaminostyrene (e.g., p-amino), poly(methylcyanoacrylate), poly(ethylcyanoacrylate), poly(butylcyanoacrylate), poly(isobutylcyanoacrylate), poly(isohexylcynaoacrylate), DEAE-methacrylate, DEAE-hexylacrylate, DEAE- acrylamide, DEAE-albumin and DEAE-dextran, polymethylacrylate,
- compositions and formulations for parenteral, intraparenchymal (into the brain), intrathecal, intraventricular or intrahepatic administration can include sterile aqueous solutions which can also contain buffers, diluents and other suitable additives such as, but not limited to, penetration enhancers, carrier compounds and other pharmaceutically acceptable carriers or excipients.
- 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. Particularly preferred are formulations that target the liver when treating hepatic disorders such as hepatic carcinoma.
- compositions 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
- the formulations are prepared by uniformly and intimately bringing into association the active ingredients with liquid carriers or finely divided solid carriers or both, and then, if necessary, shaping the product.
- compositions of the present invention can be formulated into any of many possible dosage forms such as, but not limited to, tablets, capsules, gel capsules, liquid syrups, soft gels, suppositories, and enemas.
- the compositions of the present invention can also be formulated as suspensions in aqueous, non-aqueous or mixed media.
- Aqueous suspensions can further contain substances which increase the viscosity of the suspension including, for example, sodium carboxymethylcellulose, sorbitol and/or dextran.
- the suspension can also contain stabilizers.
- 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 ⁇ . ⁇ in diameter (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, LV., Popovich NG., and Ansel HC, 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.
- Emulsions are often biphasic systems comprising two immiscible liquid phases intimately mixed and dispersed with each other.
- emulsions can be of either the water-in-oil (w/o) or the oil-in- water (o/w) variety.
- aqueous phase 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.
- oil- in-water (o/w) emulsion 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 in either the aqueous phase, oily phase or itself as a separate phase.
- compositions 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.
- a system of oil droplets enclosed in globules of water stabilized in an oily continuous phase provides an o/w/o emulsion.
- 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. Either of the phases of the emulsion can be a semisolid or a solid, as is the case of emulsion- style ointment bases and creams. 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, LV., Popovich NG., and Ansel HC, 2004, Lippincott Williams & Wilkins (8th ed.), New York, NY; Idson, in Pharmaceutical Dosage Forms,
- 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, LV., Popovich NG., and Ansel HC, 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.
- HLB hydrophile/lipophile balance
- 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, LV., Popovich NG., and Ansel HC, 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 l, p. 285).
- Naturally occurring emulsifiers used in emulsion formulations include lanolin, beeswax, phosphatides, lecithin and acacia.
- Absorption bases possess hydrophilic properties such that they can soak up water to form w/o emulsions yet retain their semisolid consistencies, such as anhydrous lanolin and hydrophilic petrolatum. Finely divided solids have also been used as good emulsifiers especially in combination with surfactants and in viscous preparations.
- polar inorganic solids such as heavy metal hydroxides, nonswelling clays such as bentonite, attapulgite, hectorite, kaolin, montmorillonite, colloidal aluminum silicate and colloidal magnesium aluminum silicate, pigments and nonpolar solids such as carbon or glyceryl tristearate.
- non-emulsifying materials are also included in emulsion formulations and contribute to the properties of emulsions.
- Hydrophilic colloids or hydrocolloids include naturally occurring gums and synthetic polymers such as polysaccharides (for example, acacia, agar, alginic acid, carrageenan, guar gum, karaya gum, and tragacanth), cellulose derivatives (for example, carboxymethylcellulose and carboxypropylcellulose), and synthetic polymers (for example, carbomers, cellulose ethers, and carboxyvinyl polymers). These disperse or swell in water to form colloidal solutions that stabilize emulsions by forming strong interfacial films around the dispersed-phase droplets and by increasing the viscosity of the external phase.
- polysaccharides for example, acacia, agar, alginic acid, carrageenan, guar gum, karaya gum, and tragacanth
- cellulose derivatives for example, carboxymethylcellulose and carboxypropylcellulose
- synthetic polymers for example, carbomers, cellulose ethers, and
- emulsions often contain a number of ingredients such as carbohydrates, proteins, sterols and phosphatides that can readily support the growth of microbes, these formulations often incorporate preservatives.
- preservatives included in emulsion formulations include methyl paraben, propyl paraben, quaternary ammonium salts, benzalkonium chloride, esters of p-hydroxybenzoic acid, and boric acid.
- Antioxidants are also commonly added to emulsion formulations to prevent deterioration of the formulation.
- Antioxidants used can be free radical scavengers such as tocopherols, alkyl gallates, butylated hydroxyanisole, butylated hydroxytoluene, or reducing agents such as ascorbic acid and sodium metabisulfite, and antioxidant synergists such as citric acid, tartaric acid, and lecithin.
- free radical scavengers such as tocopherols, alkyl gallates, butylated hydroxyanisole, butylated hydroxytoluene, or reducing agents such as ascorbic acid and sodium metabisulfite
- antioxidant synergists such as citric acid, tartaric acid, and lecithin.
- Emulsion formulations for oral delivery have been very widely used because of ease of formulation, as well as efficacy from an absorption and bioavailability standpoint (see e.g., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems, Allen, LV., Popovich NG., and Ansel HC, 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.
- 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, LV., Popovich NG., and Ansel HC, 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).
- 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). Microemulsions commonly are prepared via a combination of three to five components that include oil, water, surfactant, cosurfactant and electrolyte.
- microemulsion is of the water-in-oil (w/o) or an oil-in-water (o/w) type is dependent on the properties of the oil and surfactant used and on the structure and geometric packing of the polar heads and hydrocarbon tails of the surfactant molecules (Schott, in Remington's Pharmaceutical Sciences, Mack Publishing Co., Easton, Pa., 1985, p. 271).
- microemulsions offer the advantage of solubilizing water-insoluble drugs in a formulation of
- thermodynamically stable droplets that are formed spontaneously.
- Surfactants used in the preparation of microemulsions include, but are not limited to, ionic surfactants, non-ionic surfactants, Brij 96, polyoxyethylene oleyl ethers, polyglycerol fatty acid esters, tetraglycerol monolaurate (ML310),
- tetraglycerol monooleate MO310
- PO310 hexaglycerol monooleate
- PO500 hexaglycerol pentaoleate
- MCA750 decaglycerol monocaprate
- MO750 decaglycerol monooleate
- SO750 decaglycerol sequioleate
- DAO750 decaglycerol decaoleate
- the cosurfactant usually a short-chain alcohol such as ethanol, 1-propanol, and 1-butanol, serves to increase the interfacial fluidity by penetrating into the surfactant film and consequently creating a disordered film because of the void space generated among surfactant molecules.
- a short-chain alcohol such as ethanol, 1-propanol, and 1-butanol
- Microemulsions can, however, be prepared without the use of cosurfactants and alcohol-free self-emulsifying microemulsion systems are known in the art.
- the aqueous phase can typically be, but is not limited to, water, an aqueous solution of the drug, glycerol, PEG300, PEG400, polyglycerols, propylene glycols, and derivatives of ethylene glycol.
- the oil phase can include, but is not limited to, materials such as Captex 300, Captex 355, Capmul MCM, fatty acid esters, medium chain (C8-C12) mono, di, and tri-glycerides, polyoxyethylated glyceryl fatty acid esters, fatty alcohols, polyglycolized glycerides, saturated polyglycolized C8-C10 glycerides, vegetable oils and silicone oil.
- materials such as Captex 300, Captex 355, Capmul MCM, fatty acid esters, medium chain (C8-C12) mono, di, and tri-glycerides, polyoxyethylated glyceryl fatty acid esters, fatty alcohols, polyglycolized glycerides, saturated polyglycolized C8-C10 glycerides, vegetable oils and silicone oil.
- Microemulsions are particularly of interest from the standpoint of drug solubilization and the enhanced absorption of drugs.
- Lipid based microemulsions both o/w and w/o have been proposed to enhance the oral bioavailability of drugs, including peptides (see e.g., U.S. Patent Nos. 6,191,105; 7,063,860; 7,070,802;
- Microemulsions afford advantages of improved drug solubilization, protection of drug from enzymatic hydrolysis, possible enhancement of drug absorption due to surfactant-induced alterations in membrane fluidity and permeability, ease of preparation, ease of oral administration over solid dosage forms, improved clinical potency, and decreased toxicity (see e.g., U.S. Patent Nos. 6,191,105; 7,063,860; 7,070,802; 7,157,099; Constantinides et al., Pharmaceutical Research, 1994, 11, 1385; Ho et al., J. Pharm.
- microemulsions can form spontaneously when their components are brought together at ambient temperature. This can be particularly advantageous when formulating thermolabile drugs, peptides or iRNAs. Microemulsions have also been effective in the transdermal delivery of active components in both cosmetic and pharmaceutical applications. It is expected that the microemulsion compositions and formulations of the present invention will facilitate the increased systemic absorption of iRNAs and nucleic acids from the
- Microemulsions of the present invention can also contain additional components and additives such as sorbitan monostearate (Grill 3), Labrasol, and penetration enhancers to improve the properties of the formulation and to enhance the absorption of the iRNAs and nucleic acids of the present invention.
- Penetration enhancers used in the microemulsions of the present invention can be classified as belonging to one of five broad categories— surfactants, fatty acids, bile salts, chelating agents, and non-chelating non- surfactants (Lee et al., Critical Reviews in Therapeutic Drug Carrier Systems, 1991, p. 92). Each of these classes has been discussed above.
- An iRNA agent 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.
- the present invention employs various penetration enhancers to effect the efficient delivery of nucleic acids, particularly iRNAs, to the skin of animals.
- nucleic acids particularly iRNAs
- 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.
- 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).
- surfactants fatty acids
- Surfactants are chemical entities which, when dissolved in an aqueous solution, reduce the surface tension of the solution or the interfacial tension between the aqueous solution and another liquid, with the result that absorption of iRNAs through the mucosa is enhanced.
- these penetration enhancers include, for example, sodium lauryl sulfate, polyoxyethylene-9-lauryl ether and polyoxyethylene-20-cetyl ether) (see e.g., Malmsten, M.
- fatty acids and their derivatives which act as penetration enhancers include, for example, oleic acid, lauric acid, capric acid (n-decanoic acid), myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid, dicaprate, tricaprate, monoolein (1-monooleoyl-rac-glycerol), dilaurin, caprylic acid, arachidonic acid, glycerol 1-monocaprate, l-dodecylazacycloheptan-2-one, acylcarnitines, acylcholines, Cl-20 alkyl esters thereof (e.g., methyl, isopropyl and t-butyl), and mono- and di- glycerides thereof (i.e., oleate, laurate, caprate, myristate, palmitate, stearate, linoleate, etc.) (see e.g.,
- bile salts include any of the naturally occurring components of bile as well as any of their synthetic derivatives.
- Suitable bile salts include, for example, cholic acid (or its pharmaceutically acceptable sodium salt, sodium cholate), dehydrocholic acid (sodium dehydrocholate), deoxycholic acid (sodium deoxycholate), glucholic acid (sodium glucholate), glycholic acid (sodium glycocholate), glycodeoxycholic acid (sodium glycodeoxycholate), taurocholic acid (sodium taurocholate),
- taurodeoxycholic acid (sodium taurodeoxycholate), chenodeoxycholic acid (sodium chenodeoxycholate), ursodeoxycholic acid (UDCA), sodium tauro-24,25-dihydro- fusidate (STDHF), sodium glycodihydrofusidate and polyoxyethylene-9-lauryl ether (POE)
- POE polyoxyethylene-9-lauryl ether
- Chelating agents can be defined as compounds that remove metallic ions from solution by forming complexes therewith, with the result that absorption of iRNAs through the mucosa is enhanced.
- chelating agents have the added advantage of also serving as DNase inhibitors, as most characterized DNA nucleases require a divalent metal ion for catalysis and are thus inhibited by chelating agents (Jarrett, J. Chromatogr., 1993, 618, 315-339).
- Suitable chelating agents include but are not limited to disodium ethylenediaminetetraacetate (EDTA), citric acid, salicylates (e.g., sodium salicylate, 5-methoxysalicylate and homovanilate), N-acyl derivatives of collagen, laureth-9 and N-amino acyl derivatives of beta-diketones (enamines)(see e.g., Katdare, A.
- EDTA disodium ethylenediaminetetraacetate
- citric acid e.g., citric acid
- salicylates e.g., sodium salicylate, 5-methoxysalicylate and homovanilate
- N-acyl derivatives of collagen e.g., laureth-9 and N-amino acyl derivatives of beta-diketones (enamines)(see e.g., Katdare, A.
- non-chelating non- surfactant penetration enhancing compounds can be defined as compounds that demonstrate insignificant activity as chelating agents or as surfactants but that nonetheless enhance absorption of iRNAs through the alimentary mucosa (see e.g., Muranishi, Critical Reviews in Therapeutic Drug Carrier Systems, 1990, 7, 1-33).
- This class of penetration enhancers includes, for example, unsaturated cyclic ureas, 1-alkyl- and 1-alkenylazacyclo-alkanone derivatives (Lee et al., Critical Reviews in Therapeutic Drug Carrier Systems, 1991, page 92); and non-steroidal anti-inflammatory agents such as diclofenac sodium, indomethacin and phenylbutazone (Yamashita et al., J. Pharm. Pharmacol., 1987, 39, 621-626).
- cationic lipids such as lipofectin (Junichi et al, U.S. Pat. No. 5,705,188), cationic glycerol derivatives, and polycationic molecules, such as polylysine (Lollo et al., PCT Application WO 97/30731), are also known to enhance the cellular uptake of dsRNAs.
- lipofectin Junichi et al, U.S. Pat. No. 5,705,188
- polycationic molecules such as polylysine (Lollo et al., PCT Application WO 97/30731)
- transfection reagents include, for example LipofectamineTM (Invitrogen; Carlsbad, CA), Lipofectamine 2000TM
- compositions of the present invention also incorporate carrier compounds in the formulation.
- carrier compound or “carrier” can refer to a nucleic acid, or analog thereof, which is inert (i.e., does not possess biological activity per se) but is recognized as a nucleic acid by in vivo processes that reduce the bioavailability of a nucleic acid having biological activity by, for example, degrading the biologically active nucleic acid or promoting its removal from circulation.
- a nucleic acid and a carrier compound can result in a substantial reduction of the amount of nucleic acid recovered in the liver, kidney or other extracirculatory reservoirs, presumably due to competition between the carrier compound and the nucleic acid for a common receptor.
- the recovery of a partially phosphorothioate dsRNA in hepatic tissue can be reduced when it is coadministered with polyinosinic acid, dextran sulfate, polycytidic acid or 4-acetamido- 4'isothiocyano-stilbene-2,2'-disulfonic acid (Miyao et al., DsRNA Res. Dev., 1995, 5, 115-121; Takakura et al., DsRNA & Nucl. Acid Drug Dev., 1996, 6, 177-183.
- a “pharmaceutical carrier” or “excipient” is a pharmaceutically acceptable solvent, suspending agent or any other
- 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.
- Typical pharmaceutical carriers include, but are not limited to, binding agents (e.g., pregelatinized maize starch, polyvinylpyrrolidone or hydroxypropyl methylcellulose, etc.); fillers (e.g., lactose and other sugars, microcrystalline cellulose, pectin, gelatin, calcium sulfate, ethyl cellulose, polyacrylates or calcium hydrogen phosphate, etc.); lubricants (e.g., magnesium stearate, talc, silica, colloidal silicon dioxide, stearic acid, metallic stearates, hydrogenated vegetable oils, corn starch, polyethylene glycols, sodium benzoate, sodium acetate, etc.); disintegrants (e.g., starch, sodium starch glycolate, etc.); and wetting agents (e.g., sodium lauryl sulphate, etc).
- binding agents e.g., pregelatinized maize starch, polyvinylpyrrolidone or hydroxypropy
- compositions of the present invention can also be used to formulate the compositions of the present invention.
- pharmaceutically acceptable carriers include, but are not limited to, water, salt solutions, alcohols, polyethylene glycols, gelatin, lactose, amylose, magnesium stearate, talc, silicic acid, viscous paraffin, hydroxymethylcellulose,
- Formulations for topical administration of nucleic acids can include sterile and non-sterile aqueous solutions, non-aqueous solutions in common solvents such as alcohols, or solutions of the nucleic acids in liquid or solid oil bases.
- the solutions can also contain buffers, diluents and other suitable additives.
- Pharmaceutically acceptable organic or inorganic excipients suitable for non-parenteral administration which do not deleteriously react with nucleic acids can be used.
- Suitable pharmaceutically acceptable excipients include, but are not limited to, water, salt solutions, alcohol, polyethylene glycols, gelatin, lactose, amylose, magnesium stearate, talc, silicic acid, viscous paraffin, hydroxymethylcellulose, polyvinylpyrrolidone and the like.
- compositions of the present invention can additionally contain other adjunct components conventionally found in pharmaceutical compositions, at their art-established usage levels.
- 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.
- 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.
- 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 and/or aromatic substances and the like which do not
- Aqueous suspensions can contain substances which increase the viscosity of the suspension including, for example, sodium carboxymethylcellulose, sorbitol and/or dextran.
- the suspension can also contain stabilizers.
- compositions featured in the invention include (a) one or more iRNA compounds and (b) one or more agents which function by a non- iRNA mechanism and which are useful in treating an HDV infection.
- agents examples include, but are not lmited to antiviral agents aimed at suppressing or destroying HDV and/or HBV by interfering with viral replication; and immune modulators aimed at helping the human immune system mount a defence against the virus.
- immune modulators such as corticosteroids, which induce an enhanced expression of virus and viral antigens, and a suppression of T- lymphocyte function, or adenine arabinoside, acyclovir, or dideoxyinosine, are not beneficial for the treatment of chronic hepatitis B and/or chronic hepatitis D. Suitable agents are discussed in more detail below.
- Toxicity and therapeutic 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 therapeutically 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 preferred.
- compositions featured herein in the invention lies generally within a range of circulating
- the therapeutically 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) as determined in cell culture.
- IC50 concentration of the test compound which achieves a half-maximal inhibition of symptoms
- levels in plasma can be measured, for example, by high performance liquid chromatography.
- the iRNAs featured in the invention can be administered in combination with other known agents effective in treatment of pathological processes mediated by HDV expression.
- 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. VII. Methods of the Invention
- the present invention provides therapeutic and prophylactic methods which include administering to a subject having an HDV infection and/or HDV-associated disease, disorder, and/or condition, or prone to developing, an HDV-associated disease, disorder, and/or condition (e.g., CHB), compositions comprising an iRNA agent, or pharmaceutical compositions comprising an iRNA agent, or vectors comprising an iRNA of the invention.
- an HDV-associated disease, disorder, and/or condition e.g., CHB
- the methods of the invention are useful for treating a subject having an HDV infection, e.g., a subject that would benefit from reduction in HDV gene expression and/or HDV replication.
- the present invention provides methods of reducing the level of Hepatis B virus ccc DNA in a subject infected with HDV.
- the present invention provides methods of reducing the level of HDV antigen, e.g., HBsAg and/or HBeAg, in a subject infected with HDV.
- the present invention provides methods of reducing the viral load of HDV in a subject infected with HDV.
- the present invention also provides methods of reducing the level of alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) in a subject infected with HDV.
- ALT alanine aminotransferase
- AST aspartate aminotransferase
- the present invention provides methods for increasing the level of anti-HDV antibodies in a subject infected with HDV.
- the present invention provides methods of treating a subject having an HDV infection.
- the present invention provides methods of treating a subject having an HDV-associated disease, e.g., acute hepatitis D; hepatits B virus infection, acute hepatits B, acute fulminant hepatitis D; chronic hepatitis D; liver fibrosis; end-stage liver disease; hepatocellular carcinoma.
- the treatment methods (and uses) of the invention include administering to the subject, e.g., a human, a therapeutically effective amount of an iRNA agent of the invention targeting an HDV gene or a pharmaceutical composition comprising an iRNA agent of the invention targeting an HDV gene or a vector of the invention comprising an iRNA agent targeting an HDV gene.
- the invention provides methods of preventing at least one symptom in a subject having an HDV infection
- the present invention provides uses of a therapeutically effective amount of an iRNA agent of the invention for treating a subject, e.g. , a subject that would benefit from a reduction and/or inhibition of HDV gene expression.
- the present invention provides uses of an iRNA agent, e.g. , a dsRNA, of the invention targeting an HDV gene or pharmaceutical composition comprising an iRNA agent targeting an HDV gene in the manufacture of a medicament for treating a subject, e.g. , a subject that would benefit from a reduction and/or inhibition of HDV gene expression and/or HDV replication, such as a subject having a disorder that would benefit from reduction in HDV gene expression, e.g. , a HDV-associated disease.
- an iRNA agent e.g. , a dsRNA
- the invention provides uses of an iRNA, e.g., a dsRNA, of the invention for preventing at least one symptom in a subject suffering from a disorder that would benefit from a reduction and/or inhibition of HDV gene expression and/or HDV replication.
- an iRNA e.g., a dsRNA
- the present invention provides uses of an iRNA agent of the invention in the manufacture of a medicament for preventing at least one symptom in a subject suffering from a disorder that would benefit from a reduction and/or inhibition of HDV gene expression and/or HDV replication, such as a HDV- associated disease.
- an iRNA agent targeting HDV is administered to a subject having an HDV infection and/or an HDV-associated disease such that the expression of one or more HDV genes, HDV antigen levels, and/or HDV viral load levels, e.g., in a cell, tissue, blood or other tissue or fluid of the subject are reduced by at least about 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%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 62%, 64%, 65%, 66%, 67%, 68%
- an iRNA agent targeting HDV is administered to a subject having an HDV infection and/or an HDV-associated disease such that the level of anti-HDV antibodies, e.g. , in a cell, tissue, blood or other tissue or fluid of the subject are increased by at least about 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%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 62%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%,
- the methods and uses of the invention include administering a composition described herein such that expression of the target HDV gene is decreased, such as for about 1, 2, 3, 4 5, 6, 7, 8, 12, 16, 18, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, or about 80 hours.
- expression of the target HDV gene is decreased for an extended duration, e.g., at least about two, three, four, five, six, seven days or more, e.g. , about one week, two weeks, three weeks, or about four weeks or longer.
- Administration of the dsRNA according to the methods and uses of the invention may result in a reduction of the severity, signs, symptoms, and/or markers of such diseases or disorders in a patient with an HDV infection and/or HDV- associated disease.
- reduction in this context is meant a statistically significant decrease in such level. The reduction can be, for example, at least about 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or about 100%.
- Efficacy of treatment or prevention of disease can be assessed, for example by measuring disease progression, disease remission, symptom severity, reduction in pain, quality of life, dose of a medication required to sustain a treatment effect, level of a disease marker or any other measurable parameter appropriate for a given disease being treated or targeted for prevention. It is well within the ability of one skilled in the art to monitor efficacy of treatment or prevention by measuring any one of such parameters, or any combination of parameters.
- efficacy of treatment of CHB may be assessed, for example, by periodic monitoring of viral load and transaminase levels. Comparison of the later readings with the initial readings provide a physician an indication of whether the treatment is effective.
- an HDV-associated disease indicates that administration in a clinically appropriate manner results in a beneficial effect for at least a statistically significant fraction of patients, such as improvement of symptoms, a cure, a reduction in disease, extension of life, improvement in quality of life, or other effect generally recognized as positive by medical doctors familiar with treating HDV infection and/or an HDV-associated disease and the related causes.
- a treatment or preventive effect is evident when there is a statistically significant improvement in one or more parameters of disease status, or by a failure to worsen or to develop symptoms where they would otherwise be anticipated.
- a favorable change of at least 10% in a measurable parameter of disease can be indicative of effective treatment.
- Efficacy for a given iRNA drug or formulation of that drug can also be judged using an experimental animal model for the given disease as known in the art. When using an experimental animal model, efficacy of treatment is evidenced when a statistically significant reduction in a marker or symptom is observed.
- Subjects can be administered a therapeutic amount of iRNA, such as about 0.01 mg/kg, 0.02 mg/kg, 0.03 mg/kg, 0.04 mg/kg, 0.05 mg/kg, 0.1 mg/kg, 0.15 mg/kg, 0.2 mg/kg, 0.25 mg/kg, 0.3 mg/kg, 0.35 mg/kg, 0.4 mg/kg, 0.45 mg/kg, 0.5 mg/kg, 0.55 mg/kg, 0.6 mg/kg, 0.65 mg/kg, 0.7 mg/kg, 0.75 mg/kg, 0.8 mg/kg, 0.85 mg/kg, 0.9 mg/kg, 0.95 mg/kg, 1.0 mg/kg, 1.1 mg/kg, 1.2 mg/kg, 1.3 mg/kg, 1.4 mg/kg, 1.5 mg/kg, 1.6 mg/kg, 1.7 mg/kg, 1.8 mg/kg, 1.9 mg/kg, 2.0 mg/kg, 2.1 mg/kg, 2.2 mg/kg, 2.3 mg/kg, 2.4 mg/kg, 2.5 mg/kg dsRNA, 2.6
- a composition of the invention comprises a dsRNA as described herein and a lipid
- subjects can be administered a therapeutic amount of iRNA, such as about 0.01 mg/kg to about 5 mg/kg, about 0.01 mg/kg to about 10 mg/kg, about 0.05 mg/kg to about 5 mg/kg, about 0.05 mg/kg to about 10 mg/kg, about 0.1 mg/kg to about 5 mg/kg, about 0.1 mg/kg to about 10 mg/kg, about 0.2 mg/kg to about 5 mg/kg, about 0.2 mg/kg to about 10 mg/kg, about 0.3 mg/kg to about 5 mg/kg, about 0.3 mg/kg to about 10 mg/kg, about 0.4 mg/kg to about 5 mg/kg, about 0.4 mg/kg to about 10 mg/kg, about 0.5 mg/kg to about 5 mg/kg, about 0.5 mg/kg to about 10 mg/kg, about 1 mg/kg to about 5 mg/kg, about 1 mg/kg to about 10 mg/kg, about 1.5
- the dsRNA may be administered at a dose of about 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9,
- a composition of the invention comprises a dsRNA as described herein and an N-acetylgalactosamine
- subjects can be administered a therapeutic amount of iRNA, such as a dose of about 0.1 to about 50 mg/kg, about 0.25 to about 50 mg/kg, about 0.5 to about 50 mg/kg, about 0.75 to about 50 mg/kg, about 1 to about 50 mg/kg, about 1.5 to about 50 mg/kg, about 2 to about 50 mg/kg, about 2.5 to about 50 mg/kg, about 3 to about 50 mg/kg, about 3.5 to about 50 mg/kg, about 4 to about 50 mg/kg, about 4.5 to about 50 mg/kg, about 5 to about 50 mg/kg, about 7.5 to about 50 mg/kg, about 10 to about 50 mg/kg, about 15 to about 50 mg/kg, about 20 to about 50 mg/kg, about 20 to about 50 mg/kg, about 25 to about 50 mg/kg, about 25 to about 50 mg/kg, about 30 to about 50 mg/kg,
- composition of the invention when a composition of the invention comprises a dsRNA as described herein and an N-acetylgalactosamine, subjects can be administered a therapeutic amount of about 10 to about 30 mg/kg of dsRNA. Values and ranges intermediate to the recited values are also intended to be part of this invention.
- subjects can be administered a therapeutic amount of iRNA, such as about 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8,
- RNAi agent when a double- stranded RNAi agent includes a modification (e.g., one or more motifs of three identical modifications on three consecutive nucleotides), including one such motif at or near the cleavage site of the agent, six phosphorothioate linkages, and a ligand, such an agent is administered at a dose of about 0.01 to about 0.5 mg/kg, about 0.01 to about 0.4 mg/kg, about 0.01 to about 0.3 mg/kg, about 0.01 to about 0.2 mg/kg, about 0.01 to about 0.1 mg/kg, about 0.01 mg/kg to about 0.09 mg/kg, about 0.01 mg/kg to about 0.08 mg/kg, about 0.01 mg/kg to about 0.07 mg/kg, about 0.01 mg/kg to about 0.06 mg/kg, about 0.01 mg/kg to about 0.05 mg/kg, about 0.02 to about 0.5 mg/kg, about 0.02 to about 0.4 mg/kg, about 0.02 to about 0.3 mg/kg,
- the RNAi agent e.g. , RNAi agent in a pharmaceutical composition
- the RNAi agent is administered as a fixed dose of between about 100 mg to about 900 mg, e.g., between about 100 mg to about 850 between about 100 mg to about 800 mg, between about 100 mg to about 750 mg, between about 100 mg to about 700 mg, between about 100 mg to about 650 mg, between about 100 mg to about 600 mg, between about 100 mg to about 550 mg, between about 100 mg to about 500 mg, between about 200 mg to about 850 mg, between about 200 mg to about 800 mg, between about 200 mg to about 750 mg, between about 200 mg to about 700 mg, between about 200 mg to about 650 mg, between about 200 mg to about 600 mg, between about 200 mg to about 550 mg, between about 200 mg to about 500 mg, between about 300 mg to about 850 mg, between about 300 mg to about 800 mg, between about 300 mg to about 750 mg, between about 300 mg to about 700 mg, between about 300 mg to about 650 mg, between about 300 mg to about 600 mg, between about 300 mg to about 550 mg, between about 300 mg to about 500 mg
- the RNAi agent is administered as a fixed dose of about 100 mg, about 125 mg, about 150 mg, about 175 mg, 200 mg, about 225 mg, about 250 mg, about 275 mg, about 300 mg, about 325 mg, about 350 mg, about 375 mg, about 400 mg, about 425 mg, about 450 mg, about 475 mg, about 500 mg, about 525 mg, about 550 mg, about 575 mg, about 600 mg, about 625 mg, about 650 mg, about 675 mg, about 700 mg, about 725 mg, about 750 mg, about 775 mg, about 800 mg, about 825 mg, about 850 mg, about 875 mg, or about 900 mg.
- the iRNA can be administered by intravenous infusion over a period of time, such as over a 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or about a 25 minute period.
- the administration may be repeated, for example, on a regular basis, such as weekly, biweekly (i.e., every two weeks) for one month, two months, three months, four months or longer.
- the treatments can be administered on a less frequent basis. For example, after administration weekly or biweekly for three months, administration can be repeated once per month, for six months or a year or longer.
- Administration of the iRNA can reduce the presence of serum and/or liver HDV DNA, the presence of serum and/or liver HDV antigene.g. , in a cell, tissue, blood, urine or other compartment of the patient by at least about 5%, 6%, 7%, 8%, 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%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 7
- patients Before administration of a full dose of the iRNA, patients can be administered a smaller dose, such as a 5% infusion, and monitored for adverse effects, such as an allergic reaction.
- the patient can be monitored for unwanted immuno stimulatory effects, such as increased cytokine (e.g. , TNF-alpha or INF- alpha) levels.
- cytokine e.g. , TNF-alpha or INF- alpha
- methods of treatment of HDV can further comprise treatment of HBV using any method known in the art.
- methods of treatment of HBV comprise administration of an iRNA compound, e.g., an iRNA agent targeting an HBV gene as provided herein.
- a composition according to the invention or a pharmaceutical composition prepared therefrom can enhance the quality of life.
- An iRNA of the invention may be administered in "naked" form, where the modified or unmodified iRNA agent is directly suspended in aqueous or suitable buffer solvent, as a "free iRNA.”
- a free iRNA is administered in the absence of a pharmaceutical composition.
- the free iRNA may be in a suitable buffer solution.
- the buffer solution may comprise acetate, citrate, prolamine, carbonate, or phosphate, or any combination thereof.
- the buffer solution is phosphate buffered saline (PBS).
- PBS phosphate buffered saline
- an iRNA of the invention may be administered as a
- composition such as a dsRNA liposomal formulation.
- Subjects that would benefit from a reduction and/or inhibition of HDV gene expression are those having an HDV infection and/or an HDV-associated disease or disorder as described herein.
- Treatment of a subject that would benefit from a reduction and/or inhibition of HDV gene expression includes therapeutic and prophylactic treatment.
- 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 HDV gene expression, e.g., a subject having a HDV- 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.
- a subject administered a first RNAi agent or a first and second RNAi agent targeting HDV may further be administered one or more iRNA agents targeting HBV and/or one or more agents which function by a non- iRNA mechanism and which are useful in treating an HBV and/or an HDV infection.
- exemplary agents include immune modulators which stimulate the immune system by, for example, enhancing T-cell helper activity, maturation of B lymphocytes, inhibiting T-cell suppressors, and enhancing HLA type I expression.
- Suitable immune modulators include interferons which have a variety of properties that include antiviral, immunomodulatory, and antiproliferative effects.
- the current treatment for chronic hepatitis B is interferon therapy.
- Interferon therapy is administered to subjects who have a documented HBV infection for at least six months, elevated liver enzymes (AST and ALT) and an actively dividing virus in their blood (HBeAg, and/or HBV DNA positive tests).
- Interferon- ⁇ therapy produces a long-term, sustained remission of the disease in about 35% of those with chronic hepatitis B, with normalization of liver enzymes and loss of the three markers for an active infection (HBeAg, HBV DNA, and HBsAg).
- interferon therapy for patients with HBV-related cirrhosis decreases significantly the hepatocellular carcinoma (HCC) rate, particularly in patients with a larger amount of serum HBV DNA.
- HCC hepatocellular carcinoma
- virological and biochemical remission following interferon therapy is associated with improved survival.
- the clearance of HBeAg after treatment with interferon- is associated with improved clinical outcomes.
- the standard duration of therapy is considered 16 weeks. Patients who exhibit a low level of viral replication at the end of the standard regimen benefit most from prolonged treatment.
- an iRNA targeting one or more HDV genes is administered in combination with, e.g., an agent useful in treating an HDV-associated disease as described elsewhere herein.
- additional therapeutics and therapeutic methods suitable for treating a subject that would benefit from reduction in HDV expression include an iRNA agent targeting a different portion of the HDV genome, an antiviral agent, a nucleotide analog, a nucleoside analog, a reverse transcriptase inhibitor (e.g., Tenofovir disoproxil fumarate (TDF), Tenofovir alafenamide, Lamivudine, Adefovir dipivoxil, Entecavir (ETV), Telbivudine, AGX- 1009, emtricitabine, clevudine, ritonavir, dipivoxil, lobucavir, famvir, FTC, N- Acetyl- Cysteine (NAC), PC1323, theradigm-HBV, thymosin- alpha, and ganciclovir), an immune stimulator (e.g., peripheral agent, a nucleotide analog, a nucleoside analog
- a first iRNA agent targeting one or more HDV genes is administered in combination with a second iRNA agent targeting a different portion of the HDV genome.
- the first RNAi agent comprises a first sense strand and a first antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of said first sense strand and substantially all of the nucleotides of the first antisense strand are modified nucleotides, wherein said first sense strand is conjugated to a ligand attached at the 3 '-terminus, and wherein the ligand is one or more GalNAc derivatives attached through a bivalent or trivalent branched linker; and the second RNAi agent comprises a second sense strand and a second antisense strand forming a double- stranded region, wherein substantially all of the nucleotides of the second sense strand and substantially all of the nucleotides of the second antisense strand are modified nucleot
- the first and second sense strands each independently comprise a sequence selected from the group consisting of any one of the sense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- the first and second antisense strands each independently comprise a sequence selected from the group consisting of any one of the antisense sequences from AD-70260.1, AD-70232.1, AD-70249.1, AD-70244.1, AD-70272.1, AD-70228.1, AD-70255.1, AD-70278.1, AD-70295.1, AD-67200.1, AD-67211.1, AD-67199.1, AD-67202.1, AD-67208.1, AD-67210.1, AD-70259.1, AD-70267.1, AD-70272.1, AD-70271.1, AD-70268.1, AD-70269.1, AD-70232.1, AD-70256.1, AD-70257.1, or AD-70275.1 (or a nucleotide sequence which is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical over its entire length to the foregoing nucleotide sequences).
- all of the nucleotides of the first and second sense strand and/or all of the nucleotides of the first and second antisense strand comprise a modification.
- the at least one of the modified nucleotides is selected from the group consisting of a 3 '-terminal deoxy- thymine (dT) nucleotide, a 2'-0- 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'-0-allyl-modified nucleotide, 2'-C-alkyl-modified nucleotide, 2'- hydroxly-modified nucleotide, a 2'-methoxyethyl modified nucleotide, a 2'-0-alkyl- modified nucleotide, a
- a subject administered a first or a first and second RNAi agent may further be administered one or more iRNA agents targeting HBV antiviral agent, a reverse transcriptase inhibitor (e.g., Tenofovir disoproxil fumarate (TDF), Tenofovir alafenamide, Lamivudine, Adefovir dipivoxil, Entecavir (ETV), Telbivudine, and AGX-1009), an immune stimulator (e.g., pegylated interferon alfa 2a (PEG-IFN-Cc2a), Interferon alfa-2b, a recombinant human interleukin-7, and aToll-like receptor 7 (TLR7) agonist), a therapeutic vaccine (e.g., GS-4774, DV-601, and TG1050), a viral entry inhibitor (e.g., Myrcludex), an oligonucleotide that inhibits the secretion or release of HbsAg
- the methods of the invention include administering to a subject having an HDV infection and/or HDV-associated disease a reverse
- the methods of the invention include administering to a subject having an HDV infection and/or HDV-associate disease a reverse transcriptase inhibitor and an immune stimulator.
- 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.
- the present invention also provides methods of using an iRNA agent of the invention and/or a composition containing an iRNA agent of the invention to reduce and/or inhibit HDV expression in a cell.
- the present invention provides an iRNA of the invention and/or a composition comprising an iRNA of the invention for use in reducing and/or inhibiting HDV gene expression in a cell.
- use of an iRNA of the invention and/or a composition comprising an iRNA of the invention for the manufacture of a medicament for reducing and/or inhibiting HDV gene expression in a cell are provided.
- the present invention provides an iRNA of the invention and/or a composition comprising an iRNA of the invention for use in reducing and/or inhibiting HDV replication in a cell.
- use of an iRNA of the invention and/or a composition comprising an iRNA of the invention for the manufacture of a medicament for reducing and/or inhibiting HDV replication in a cell are provided.
- the methods and uses include contacting the cell with an iRNA, e.g., a dsRNA, of the invention and maintaining the cell for a time sufficient to obtain degradation of the mRNA transcript of an HDV gene, thereby inhibiting expression of the HDV gene or inhibiting HDV replication in the cell.
- Reduction in gene expression can be assessed by any methods known in the art.
- a reduction in the expression of HDV may be determined by determining the mRNA expression level of HDV using methods routine to one of ordinary skill in the art, e.g., Northern blotting, qRT-PCR, by determining the protein level of HDV using methods routine to one of ordinary skill in the art, such as western blotting, immunological techniques, flow cytometry methods, ELISA, and/or by determining a biological activity of HDV.
- the cell may be contacted in vitro or in vivo, i.e., the cell may be within a subject.
- a cell suitable for treatment using the methods of the invention may be any cell that expresses an HDV gene, e.g., a cell infected with HDV or a cell comprising an expression vector comprising an HDV genome or portion of an HDV gene.
- a cell suitable for use in the methods and uses of the invention may be a mammalian cell, e.g., a primate cell (such as a human cell or a non-human primate cell, e.g., a monkey cell or a chimpanzee cell), a non-primate cell (such as a cow cell, a pig cell, a camel cell, a llama cell, a horse cell, a goat cell, a rabbit cell, a sheep cell, a hamster, a guinea pig cell, a cat cell, a dog cell, a rat cell, a mouse cell, a lion cell, a tiger cell, a bear cell, or a buffalo cell), a bird
- HDV gene expression may be inhibited in the cell by at least about 5%, 6%, 7%, 8%, 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%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 8
- HDV replication may be inhibited in the cell by at least about 5%, 6%, 7%, 8%, 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%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%
- the in vivo methods and uses 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 HDV gene of the mammal to be treated.
- the composition can be administered by any means known in the art including, but not limited to subcutaneous, intravenous, oral, intraperitoneal, or parenteral routes, including intracranial (e.g., intraventricular, intraparenchymal and intrathecal), intramuscular, transdermal, airway (aerosol), nasal, rectal, and topical (including buccal and sublingual) administration.
- the compositions are administered by subcutaneous injection.
- the compositions are administered by intravenous infusion or injection.
- the compositions are administered by intramuscular injection.
- the administration is via a depot injection.
- a depot injection may release the iRNA in a consistent way over a prolonged time period.
- a depot injection may reduce the frequency of dosing needed to obtain a desired effect, e.g., a desired inhibition of HDV, or a therapeutic or prophylactic effect.
- a depot injection may also provide more consistent serum concentrations.
- Depot injections may include subcutaneous injections or intramuscular injections. In preferred embodiments, the depot injection is a subcutaneous injection.
- the administration is via a pump.
- the pump may be an external pump or a surgically implanted pump.
- the pump is a subcutaneously implanted osmotic pump.
- the pump is an infusion pump.
- An infusion pump may be used for intravenous, subcutaneous, arterial, or epidural infusions.
- the infusion pump is a subcutaneous infusion pump.
- the pump is a surgically implanted pump that delivers the iRNA to the liver.
- the mode of administration may be chosen based upon whether local or systemic treatment is desired and based upon the area to be treated.
- the route and site of administration may be chosen to enhance targeting.
- the present invention also provides methods for inhibiting the expression of an HDV gene in a mammal, e.g., a human.
- the present invention also provides a composition comprising an iRNA, e.g., a dsRNA, that targets an HDV gene in a cell of a mammal for use in inhibiting expression of the HDV gene in the mammal.
- the present invention provides use of an iRNA, e.g., a dsRNA, that targets an HDV gene in a cell of a mammal in the manufacture of a medicament for inhibiting expression of the HDV gene in the mammal.
- the methods and uses include administering to the mammal, e.g., a human, a composition comprising an iRNA, e.g., a dsRNA, that targets an HDV gene in a cell of the mammal and maintaining the mammal for a time sufficient to obtain degradation of the mRNA transcript of the HDV gene, thereby inhibiting expression of the HDV gene in the mammal.
- Reduction in gene expression can be assessed in peripheral blood sample of the iRNA-administered subject by any methods known it the art, e.g. qRT-PCR, described herein.
- Reduction in protein production can be assessed by any methods known it the art and by methods, e.g., ELISA or western blotting, described herein.
- a puncture liver biopsy sample serves as the tissue material for monitoring the reduction in HDV gene and/or protein expression.
- a blood sample serves as the tissue material for monitoring the reduction in HDV gene and/or protein expression.
- verification of RISC medicated cleavage of target in vivo following administration of iRNA agent is done by performing 5 '-RACE or modifications of the protocol as known in the art (Lasham A et al., (2010) Nucleic Acid Res., 38 (3) p-el9) (Zimmermann et al. (2006) Nature 441: 111-4).
- reagent can be obtained from any supplier of reagents for molecular biology at a
- siRNA designs targeting HBV was driven by two primary factors: a) potency and b), the desire to employ siRNA with near-perfect matches with greater than 90% fractional coverage of the large number of public HBV sequences of all known serotypes (A through H).
- the coordinates for the siRNA selection were determined relative to the NCBI HBV reference genome sequence NC_003977.1 (GenBank Accession No. GL21326584 (SEQ ID NO: l).
- SEQ ID NO: l The reverse complement of SEQ ID NO: l is provided in SEQ ID NO:2.
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