期刊
JOURNAL OF IMMUNOLOGY
卷 194, 期 7, 页码 3102-3115出版社
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.1401538
关键词
-
类别
资金
- National Natural Science Foundation of China [81273250]
- Ministry of Science and Technology of China [2010CB530100, 2013ZX10001005-003-002]
- Hotung Trust
HSV-2 is the major cause of genital herpes, and its infection increases the risk of HIV-1 acquisition and transmission. After initial infection, HSV-2 can establish latency within the nervous system and thus maintains lifelong infection in humans. It has been suggested that HSV-2 can inhibit type I IFN signaling, but the underlying mechanism has yet to be determined. In this study, we demonstrate that productive HSV-2 infection suppresses Sendai virus (SeV) or polyinosinic-polycytidylic acid-induced IFN-beta production. We further reveal that US1, an immediate-early protein of HSV-2, contributes to such suppression, showing that US1 inhibits IFN-beta promoter activity and IFN-beta production at both mRNA and protein levels, whereas US1 knockout significantly impairs such capability in the context of HSV-2 infection. US1 directly interacts with DNA binding domain of IRF-3, and such interaction suppresses the association of nuclear IRF-3 with the IRF-3 responsive domain of IFN-beta promoter, resulting in the suppression of IFN-beta promoter activation. Additional studies demonstrate that the 217-414 aa domain of US1 is critical for the suppression of IFN-beta production. Our results indicate that HSV-2 US1 downmodulates IFN-beta production by suppressing the association of IRF-3 with the IRF-3 responsive domain of IFN-beta promoter. Our findings highlight the significance of HSV-2 US1 in inhibiting IFN-beta production and provide insights into the molecular mechanism by which HSV-2 evades the host innate immunity, representing an unconventional strategy exploited by a dsDNA virus to interrupt type I IFN signaling pathway.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据