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Functional microRNA screen uncovers O-linked N-acetylglucosamine transferase as a host factor modulating hepatitis C virus morphogenesis and infectivity
Gut ( IF 23.0 ) Pub Date : 2019-05-10 , DOI: 10.1136/gutjnl-2018-317423
Katharina Herzog 1, 2 , Simonetta Bandiera 1, 2 , Sophie Pernot 1, 2 , Catherine Fauvelle 1, 2 , Frank Jühling 1, 2 , Amélie Weiss 2, 3, 4, 5 , Anne Bull 6 , Sarah C Durand 1, 2 , Béatrice Chane-Woon-Ming 2, 7 , Sébastien Pfeffer 2, 7 , Marion Mercey 8 , Hervé Lerat 8 , Jean-Christophe Meunier 6 , Wolfgang Raffelsberger 2, 3, 4, 5 , Laurent Brino 2, 3, 4, 5 , Thomas F Baumert 1, 2, 9 , Mirjam B Zeisel 1, 2, 10
Affiliation  

Objective Infection of human hepatocytes by the hepatitis C virus (HCV) is a multistep process involving both viral and host factors. microRNAs (miRNAs) are small non-coding RNAs that post-transcriptionally regulate gene expression. Given that miRNAs were indicated to regulate between 30% and 75% of all human genes, we aimed to investigate the functional and regulatory role of miRNAs for the HCV life cycle. Design To systematically reveal human miRNAs affecting the HCV life cycle, we performed a two-step functional high-throughput miRNA mimic screen in Huh7.5.1 cells infected with recombinant cell culture-derived HCV. miRNA targeting was then assessed using a combination of computational and functional approaches. Results We uncovered miR-501-3p and miR-619-3p as novel modulators of HCV assembly/release. We discovered that these miRNAs regulate O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT) protein expression and identified OGT and O-GlcNAcylation as regulators of HCV morphogenesis and infectivity. Furthermore, increased OGT expression in patient-derived liver tissue was associated with HCV-induced liver disease and cancer. Conclusion miR-501-3p and miR-619-3p and their target OGT are previously undiscovered regulatory host factors for HCV assembly and infectivity. In addition to its effect on HCV morphogenesis, OGT may play a role in HCV-induced liver disease and hepatocarcinogenesis.

中文翻译:

功能性 microRNA 筛选揭示了 O-连接的 N-乙酰氨基葡萄糖转移酶作为调节丙型肝炎病毒形态发生和感染性的宿主因子

目的丙型肝炎病毒(HCV)感染人类肝细胞是一个多步骤的过程,涉及病毒和宿主因素。microRNA (miRNA) 是小的非编码 RNA,可在转录后调节基因表达。鉴于 miRNA 可调节 30% 至 75% 的所有人类基因,我们旨在研究 miRNA 在 HCV 生命周期中的功能和调节作用。设计 为了系统地揭示影响 HCV 生命周期的人类 miRNA,我们在用重组细胞培养衍生的 HCV 感染的 Huh7.5.1 细胞中进行了两步功能性高通量 miRNA 模拟筛选。然后使用计算和功能方法的组合评估 miRNA 靶向。结果 我们发现 miR-501-3p 和 miR-619-3p 作为 HCV 组装/释放的新型调节剂。我们发现这些 miRNA 调节 O-连接的 N-乙酰氨基葡萄糖 (O-GlcNAc) 转移酶 (OGT) 蛋白的表达,并确定 OGT 和 O-GlcNAcylation 是 HCV 形态发生和感染性的调节因子。此外,患者来源的肝组织中 OGT 表达增加与 HCV 诱导的肝病和癌症有关。结论 miR-501-3p 和 miR-619-3p 及其靶标 OGT 是以前未被发现的 HCV 组装和感染性调节宿主因子。除了对 HCV 形态发生的影响外,OGT 还可能在 HCV 诱导的肝病和肝癌发生中起作用。患者来源的肝组织中 OGT 表达增加与 HCV 诱导的肝病和癌症有关。结论 miR-501-3p 和 miR-619-3p 及其靶标 OGT 是以前未被发现的 HCV 组装和感染性调节宿主因子。除了对 HCV 形态发生的影响外,OGT 还可能在 HCV 诱导的肝病和肝癌发生中起作用。患者来源的肝组织中 OGT 表达增加与 HCV 诱导的肝病和癌症有关。结论 miR-501-3p 和 miR-619-3p 及其靶标 OGT 是以前未被发现的 HCV 组装和感染性调节宿主因子。除了对 HCV 形态发生的影响外,OGT 还可能在 HCV 诱导的肝病和肝癌发生中起作用。
更新日期:2019-05-10
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