A functional genomic screen identifies cellular cofactors of hepatitis C virus replication.

A functional genomic screen identifies cellular cofactors of hepatitis C virus replication.
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DOI:
10.1016/j.chom.2009.02.001
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发表时间:
2009-03-19
影响因子:
30.3
通讯作者:
Chung RT
Chung RT
中科院分区:
医学1区
文献类型:
--
作者:
Tai AW;Benita Y;Peng LF;Kim SS;Sakamoto N;Xavier RJ;Chung RT

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丙型肝炎病毒(丙型肝炎病毒)慢性感染世界人口的3%,丙型肝炎病毒并发症是肝移植的主要适应症。考虑到需要更好的抗丙型肝炎病毒疗法,一种策略是识别和靶向病毒生命周期的细胞辅助因子。利用全基因组siRNA文库,我们鉴定了96个支持丙型肝炎病毒复制的人类基因,其中相当数量的基因参与了囊泡的组织和生物发生。磷脂酰肌醇4-激酶PI4KA和COPI囊泡被复合体的多个亚基都在被鉴定的基因之列。与此一致的是,COPI和PI4KA的药物抑制剂阻止了丙型肝炎病毒的复制。靶向海普西丁,一种对铁平衡至关重要的多肽,也影响了丙型肝炎病毒的复制,这可能解释了已知的丙型肝炎病毒感染中铁平衡失调的原因。这项研究中确定的丙型肝炎病毒复制的宿主辅助因子应该可以作为描述抗丙型肝炎病毒治疗的新靶点的有用资源。
Hepatitis C virus (HCV) chronically infects 3% of the world’s population, and complications from HCV are the leading indication for liver transplantation. Given the need for better anti-HCV therapies, one strategy is to identify and target cellular cofactors of the virus lifecycle. Using a genome-wide siRNA library, we identified 96 human genes that support HCV replication, with a significant number of them being involved in vesicle organization and biogenesis. Phosphatidylinositol 4-kinase PI4KA and multiple subunits of the COPI vesicle coat complex were among the genes identified. Consistent with this, pharmacologic inhibitors of COPI and PI4KA blocked HCV replication. Targeting hepcidin, a peptide critical for iron homeostasis, also affected HCV replication, which may explain the known dysregulation of iron homeostasis in HCV infection. The host cofactors for HCV replication identified in this study should serve as a useful resource in delineating new targets for anti-HCV therapies.
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