Cellular microRNA networks regulate host dependency of hepatitis C virus infection.

Cellular microRNA networks regulate host dependency of hepatitis C virus infection.
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DOI:
10.1038/s41467-017-01954-x
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发表时间:
2017-11-27
影响因子:
16.6
通讯作者:
Liang TJ
Liang TJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li Q;Lowey B;Sodroski C;Krishnamurthy S;Alao H;Cha H;Chiu S;El-Diwany R;Ghany MG;Liang TJ

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Cellular microRNAs (miRNAs) have been shown to regulate hepatitis C virus (HCV) replication, yet a systematic interrogation of the repertoire of miRNAs impacting HCV life cycle is lacking. Here we apply integrative functional genomics strategies to elucidate global HCV–miRNA interactions. Through genome-wide miRNA mimic and hairpin inhibitor phenotypic screens, and miRNA–mRNA transcriptomics analyses, we identify three proviral and nine antiviral miRNAs that interact with HCV. These miRNAs are functionally linked to particular steps of HCV life cycle and related viral host dependencies. Further mechanistic studies demonstrate that miR-25, let-7, and miR-130 families repress essential HCV co-factors, thus restricting viral infection at multiple stages. HCV subverts the antiviral actions of these miRNAs by dampening their expression in cell culture models and HCV-infected human livers. This comprehensive HCV–miRNA interaction map provides fundamental insights into HCV-mediated pathogenesis and unveils molecular pathways linking RNA biology to viral infections. Using genome-wide miRNA mimic and hairpin inhibitor screens, Li et al. identify 31 miRNAs that either inhibit or promote hepatitis C virus (HCV) replication at different steps of the viral life cycle. Furthermore, human liver biopsies show that HCV down-regulates identified miRNAs with antiviral function.
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