Zika virus inhibits type-I interferon production and downstream signaling

被引:254
作者
Kumar, Anil [1 ]
Hou, Shangmei [1 ]
Airo, Adriana M. [2 ]
Limonta, Daniel [1 ]
Mancinelli, Valeria [1 ]
Branton, William [3 ]
Power, Christopher [3 ]
Hobman, Tom C. [1 ,2 ,4 ,5 ]
机构
[1] Univ Alberta, Dept Cell Biol, Edmonton, AB, Canada
[2] Univ Alberta, Dept Med Microbiol & Immunol, Edmonton, AB, Canada
[3] Univ Alberta, Dept Med, Edmonton, AB, Canada
[4] Univ Alberta, Li Ka Shing Inst Virol, Edmonton, AB, Canada
[5] Univ Alberta, Women & Childrens Hlth Res Inst, Edmonton, AB, Canada
基金
加拿大健康研究院;
关键词
flavivirus; interferon response; NS5; STAT2; Zika virus; SEXUAL TRANSMISSION; GAMMA-INTERFERON; ALPHA-INTERFERON; MOUSE MODEL; DENGUE; STAT2; INFECTION; BINDING; RNA;
D O I
10.15252/embr.201642627
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Zika virus is an emerging mosquito-borne pathogen that is associated with Guillain-Barre syndrome in adults and microcephaly and other neurological defects in newborns. Despite being declared an international emergency by the World Health Organization, comparatively little is known about its biology. Here, we investigate the strategies employed by the virus to suppress the host antiviral response. We observe that once established, Zika virus infection is impervious to interferon treatment suggesting that the virus deploys effective countermeasures to host cell defences. This is confirmed by experiments showing that Zika virus infection impairs the induction of type-I interferon as well as downstream interferon-stimulated genes. Multiple viral proteins affect these processes. Virus-mediated degradation of STAT2 acts to reduce type-I and type-III interferon-mediated signaling. Further, the NS5 of Zika virus binds to STAT2, and its expression is correlated with STAT2 degradation by the proteasome. Together, our findings provide key insights into how Zika virus blocks cellular defense systems. This in turn is important for understanding pathogenesis and may aid in designing antiviral therapies.
引用
收藏
页码:1766 / 1775
页数:10
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