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Zika virus evades interferon-mediated antiviral response through the co-operation of multiple nonstructural proteins in vitro.


ABSTRACT: Type I interferon (IFN) serves as the first line of defense against invading pathogens. Inhibition of IFN-triggered signaling cascade by Zika virus (ZIKV) plays a critical role for ZIKV to evade antiviral responses from host cells. Here we demonstrate that ZIKV nonstructural proteins NS1, NS4B and NS2B3 inhibit the induction of IFN and downstream IFN-stimulated genes through diverse strategies. NS1 and NS4B of ZIKV inhibit IFN? signaling at TANK-binding kinase 1 level, whereas NS2B-NS3 of ZIKV impairs JAK-STAT signaling pathway by degrading Jak1 and reduces virus-induced apoptotic cell death. Furthermore, co-operation of NS1, NS4B and NS2B3 further enhances viral infection by blocking IFN-induced autophagic degradation of NS2B3. Hence, our study reveals a novel antagonistic system employing multiple ZIKV nonstructural proteins in restricting the innate antiviral responses.

SUBMITTER: Wu Y 

PROVIDER: S-EPMC5359216 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Zika virus evades interferon-mediated antiviral response through the co-operation of multiple nonstructural proteins <i>in vitro</i>.

Wu Yaoxing Y   Liu Qingxiang Q   Zhou Jie J   Xie Weihong W   Chen Cheng C   Wang Zefang Z   Yang Haitao H   Cui Jun J  

Cell discovery 20170321


Type I interferon (IFN) serves as the first line of defense against invading pathogens. Inhibition of IFN-triggered signaling cascade by Zika virus (ZIKV) plays a critical role for ZIKV to evade antiviral responses from host cells. Here we demonstrate that ZIKV nonstructural proteins NS1, NS4B and NS2B3 inhibit the induction of IFN and downstream IFN-stimulated genes through diverse strategies. NS1 and NS4B of ZIKV inhibit IFNβ signaling at TANK-binding kinase 1 level, whereas NS2B-NS3 of ZIKV i  ...[more]

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