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21. 发明授权

US08454974B2 Adaptive mutations allow establishment of JFH1-based cell culture systems for hepatitis C virus genotype 4A 有权
标题翻译：自适应突变允许建立基于JFH1的丙型肝炎病毒基因型4A的细胞培养系统
公开(公告)号：US08454974B2
公开(公告)日：2013-06-04
申请号：US12595825
申请日：2008-04-11
申请人： Troels Kasper Høyer Scheel , Judith M. Gottwein , Jesper Eugen-Olsen , Jens Bukh
发明人： Troels Kasper Høyer Scheel , Judith M. Gottwein , Jesper Eugen-Olsen , Jens Bukh
IPC分类号： A61K39/29 , C12N7/02 , C12N15/06 , C12Q1/02 , C07H21/00
CPC分类号： C12N7/00 , A61K2039/5254 , C12N2770/24221
摘要： The present inventors developed three 4a/2a intergenotypic recombinants in which the JFH1 structural genes (Core, E1 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/JFH1-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/JFH1-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.
摘要翻译：本发明人开发了三种4a / 2a基因型重组体，其中JFH1结构基因（Core，E1和E2），p7以及NS2的全部或部分被基因型4a参考菌株ED43的相应基因替代。 NS2中的4a / 2a连接处置于第一跨膜结构域（α），细胞质部分（β）或NS2 / NS3切割位点（y）之后。在用RNA转录物转染Huh7.5细胞后，仅在ED43 / JFH1-β和-y培养物中产生感染性病毒。与2a对照病毒相比，感染性病毒的产生显着延迟。然而，在随后的传代中，获得了有效的感染传播和高HCV RNA滴度。感染滴度比2a对照病毒低约10倍。来自3个连续传代和随后的反向遗传研究的回收的4a / 2a重组体的序列分析揭示了对NS2a4部分突变的重要依赖性。 ED43 / JFH1-gamma进一步依赖于第二NS2突变。 4a / 2a病毒的感染率依赖于CD81。结论：开发的4a / 2a病毒为HCV基因型4的研究提供了强大的体外工具，包括中东和欧洲越来越重要的基因型的疫苗研究和功能分析。

22. 发明授权

US08945584B2 Cell culture system of a hepatitis C genotype 3a and 2a chimera 有权
标题翻译：丙型肝炎基因型3a和2a嵌合体的细胞培养系统
公开(公告)号：US08945584B2
公开(公告)日：2015-02-03
申请号：US12595822
申请日：2008-04-11
申请人： Judith M. Gottwein , Troels Kasper Høyer Scheel , Jesper Eugen-Olsen , Jens Bukh
发明人： Judith M. Gottwein , Troels Kasper Høyer Scheel , Jesper Eugen-Olsen , Jens Bukh
IPC分类号： A61K39/29 , A61K39/12 , C12N7/02 , C12N15/06 , C12Q1/02 , C07H21/00 , C12N7/00 , A61K39/00
CPC分类号： C12N7/00 , A61K2039/5254 , C12N2770/24251
摘要： A robust and genetically stable cell culture system for Hepatitis C Virus (HCV) genotype 3a is provided. A genotype 3a/2a (S52/JFH1) recombinant containing the structural genes (Core, E1, E2), p7 and NS2 of strain S52 was constructed and characterized in Huh7.5 cells. S52/JFH1 and J6/JFH viruses passaged in cell culture had comparable growth kinetics and yielded similar peak HCV RNA titers and infectivity titers. Direct genome sequencing of cell culture derived S52/JFH1 viruses identified putative adaptive mutations in Core, E2, p7, NS3, and NS5A; clonal analysis revealed that all genomes analyzed exhibited different combinations of these mutations. Finally, viruses resulting from transfection with RNA transcripts of five S52/JFH1 recombinants containing these combinations of putative adaptive mutations performed as efficiently as J6/JFH viruses in Huh7.5 cells and were all genetically stable after viral passage.
摘要翻译：提供了一种用于丙型肝炎病毒（HCV）基因型3a的强大且遗传稳定的细胞培养系统。在Huh7.5细胞中构建并表征了包含菌株S52的结构基因（Core，E1，E2），p7和NS2的基因型3a / 2a（S52 / JFH1）重组体。在细胞培养物中传代的S52 / JFH1和J6 / JFH病毒具有相似的生长动力学，并产生相似的HCV RNA滴度和感染性滴度。来自S52 / JFH1病毒的细胞培养物的直接基因组测序鉴定了核心，E2，p7，NS3和NS5A中的推定的适应性突变; 克隆分析显示，所有分析的基因组都显示出这些突变的不同组合。最后，将含有这些假定适应性突变的组合的5种S52 / JFH1重组体的RNA转录物转染的病毒与Huh7.5细胞中J6 / JFH病毒一样有效地进行，并且在病毒传代后均具有遗传稳定性。

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