Seneca Valley Virus 3C(pro) abrogates the IRF3-and IRF7-mediated innate immune response by degrading IRF3 and IRF7
文献类型： 外文期刊
第一作者： Xue, Qiao
作者： Xue, Qiao;Liu, Huisheng;Zhu, Zixiang;Yang, Fan;Zheng, Haixue;Cai, Xuepeng;Xue, Qinghong;Ma, Linna
作者机构：
关键词： Seneca Valley Virus; Innate immunity; 3C-like protease; IRF3; IRF7
期刊名称：VIROLOGY （ 影响因子：3.616； 五年影响因子：3.967 ）
ISSN： 0042-6822
年卷期： 2018 年 518 卷
页码：
收录情况： SCI
摘要： Seneca Valley Virus (SVV) is a newly emerged virus belonging to the family Picornaviridae. Basic knowledge of the immunological response to SVV is limited. To date, one study has demonstrated that SW 3C(pro) mediates the cleavage of host MAVS, TRIF, and TANK at specific sites and consequently escapes the host's antiviral innate immunity. In this study, we show that SVV 3C(pro) reduces IRF3 and IRF7 protein expression level and phosphorylation. SVV infection also reduces expression of IRF3 and IRF7 protein. The degradation of IRF3 and IRF7 is dependent on the 3C(pro) protease activity. We also identify interactions between 3C(pro) and IRF3 and IRF7 in PK-15 cells. A detailed analysis revealed that the degradation of IRF3 and IRF7 blocks the transcription of IFN-beta, IFN-alpha 1, IFN-alpha 4, and ISG54. Together, our results demonstrate a novel mechanism developed by SW 3C(pro) to allow the virus to escape the host's intrinsic innate immune system.
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