摘要:
The present invention relates to nucleic acid sequences that encode hepatitis C viruses (HCV) of genotype 6a that are useful in the fundamental research of HCV as well as in the search of antivirals and vaccines against HCV. In particular, the present invention relates to nucleic acid sequences that comprises HCVs, which are capable of expressing said virus when transfected into cells and are capable of replication or infectivity in cultured cells.
摘要:
The invention is directed to novel hepatotropic hepaciviruses isolated in Norway rats (Rattus norvegicus), designated NrHV-1 or RHV-rn-NY01 and NrHV-2 or RHV-rn-NY02, and isolated nucleic acids sequences and polypeptides thereof. The invention also relates to antibodies against antigens from NrHV- 1 or NrHV-2 found in Rattus norvegicus. The invention also relates to iRNAs which target nucleic acid sequences of NrHV- 1 or NrHV-2 found in Rattus norvegicus. The invention is related to methods for detecting the presence or absence of NrHV-1 or NrHV-2 found in Rattus norvegicus in an animal. The invention is also related to immunogenic compositions for inducing an immune response against NrHV-1 or NrHV-2 in an animal. The invention is also related to a cell culture system and a laboratory animal to model human hepatitis C virus (HCV).
摘要:
It is disclosed herein that viruses coated in silica retain infectivity and the capacity to induce an immune response in an infected host. In addition, silicifled virus is remarkably resistant to desiccation. Provided herein are methods of inducing a virus-specific immune response in a subject by administering to the subject an effective amount of silicified virus or silicified virus particles. Methods of enhancing a virus-specific cell-mediated immune response (such as aT cell-mediated immune response) in a subject by administering to the subject a silicified virus or silicified virus particles are also described herein. Further provided are immunogenic compositions comprising silicified virus or silicified virus particles, such as compositions useful as vaccines. The immunogenic compositions include a pharmaceutically acceptable carrier and/or an adjuvant.
摘要:
The invention is directed to immunogenic compositions and methods for inducing an immune response against Non-Primate Hepacivirus in an animal. In another aspect, the invention relates to antibodies that bind Non-Primate Hepacivirus polypeptides. In yet another aspect, the invention relates to methods for preventing, or reducing NPHV infection in an animal.
摘要:
Genotype 7a has been identified recently, thus not much is known about the biology of this new, major HCV genotype. The present inventors developed hepatitis C virus 7a/2a intergenotypic recombinants in which the JFH1 structural genes (Core, E1 and E2), p7 and the complete NS2 were replaced by the corresponding genes of the genotype 7a strain QC69 and characterized them in Huh7.5 cells. Sequence analysis of 7a/JFH1 recombinants recovered after viral passage in Huh7.5 cells following 4 independent transfection experiments revealed adaptive mutations in Core, E2, NS2, NS5A and NS5B. In reverse genetic studies the importance of these mutations for improved growth kinetics was shown. Adapted 7a/JFH1 viruses showed growth kinetics, infectivity and RNA titers comparable to a previously developed 3a/JFH1 reference virus. Conclusion: The developed 7a/JFH1 viruses provide a robust in vitro tool for research in HCV genotype 7, including vaccine studies and functional analyses.
摘要:
The present inventors developed hepatitis C virus 2b/2a intergenotypic recombinants in which the JFH1 structural genes (Core, E1 and E2), p7 and the complete NS2 were replaced by the corresponding genes of the genotype 2b reference strain J8. Sequence analysis of recovered 2b/2a recombinants from 2 transfection experiments revealed that 2b/2a was genetically stable. Conclusion: The developed 2b/2a viruses provide a robust in vitro tool for research in HCV genotype 2b, including vaccine studies and functional analyses.
摘要:
The present inventors developed hepatitis C virus 6a/2a intergenotypic recombinants in which the JFH1 structural genes (Core, E1 and E2), p7 and the complete NS2 were replaced by the corresponding genes of the genotype 6a reference strain HK6a. Sequence analysis of recovered 6a/2a recombinants from 2 transfection experiments and subsequent reverse genetic studies revealed adaptive mutations in E1 and E2. Conclusion: The developed 6a/2a viruses provide a robust in vitro tool for research in HCV genotype 6, including vaccine studies and functional analyses.
摘要:
The present inventors developed three 4a/2a intergenotypic recombinants in which the JFHl structural genes (Core, El and E2), p7 and all of or part of NS2 were replaced by the corresponding genes of the genotype 4a reference strain ED43. The 4a/2a junction in NS2 was placed after the first transmembrane domain (α), in the cytoplasmic part (β) or at the NS2/NS3 cleavage site (y). Following transfection of Huh7.5 cells with RNA transcripts, infectious viruses were produced in the ED43/JFHl-β and -y cultures only. Compared to the 2a control virus, production of infectious viruses was significantly delayed. However, in subsequent passages efficient spread of infection and high HCV RNA titers were obtained. Infectivity titers were approximately 10-fold lower than for the 2a control virus. Sequence analysis of recovered 4a/2a recombinants from 3 serial passages and subsequent reverse genetic studies revealed a vital dependence on a mutation in the NS2 4a part. ED43/JFHl-γ further depended on a second NS2 mutation. Infectivity of the 4a/2a viruses was CD81 dependent. Conclusion : The developed 4a/2a viruses provide a robust in vitro tool for research in HCV genotype 4, including vaccine studies and functional analyses of an increasingly important genotype in the Middle East and Europe.
摘要:
A cell including: (a) a hepatitis C virus genome, and/or nucleic acid encoding a hepatitis C virus genome; and (b) nucleic acid encoding one or both of hepatitis C virus proteins El and E2. The cells can be grown in culture in order to support HCV replication, and HCV virions can be purified from them.
摘要:
A cell including: (a) a hepatitis C virus genome, and/or nucleic acid encoding a hepatitis C virus genome; and (b) nucleic acid encoding one or both of hepatitis C virus proteins El and E2. The cells can be grown in culture in order to support HCV replication, and HCV virions can be purified from them.