A dual-role of SARS-CoV-2 nucleocapsid protein in regulating innate immune response.
A dual-role of SARS-CoV-2 nucleocapsid protein in regulating innate immune response.
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SARS-CoV-2 核衣壳蛋白在调节先天免疫反应中的双重作用
DOI:
10.1038/s41392-021-00742-w
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发表时间:
2021-09-01
影响因子:
39.3
通讯作者:
Wang G
中科院分区:
文献类型:
--
作者:
Zhao Y;Sui L;Wu P;Wang W;Wang Z;Yu Y;Hou Z;Tan G;Liu Q;Wang G
The recently emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is the causative agent of ongoing global pandemic of COVID-19, may trigger immunosuppression in the early stage and overactive immune response in the late stage of infection; However, the underlying mechanisms are not well understood. Here we demonstrated that the SARS-CoV-2 nucleocapsid (N) protein dually regulated innate immune responses, i.e., the low-dose N protein suppressed type I interferon (IFN-I) signaling and inflammatory cytokines, whereas high-dose N protein promoted IFN-I signaling and inflammatory cytokines. Mechanistically, the SARS-CoV-2 N protein dually regulated the phosphorylation and nuclear translocation of IRF3, STAT1, and STAT2. Additionally, low-dose N protein combined with TRIM25 could suppress the ubiquitination and activation of retinoic acid-inducible gene I (RIG-I). Our findings revealed a regulatory mechanism of innate immune responses by the SARS-CoV-2 N protein, which would contribute to understanding the pathogenesis of SARS-CoV-2 and other SARS-like coronaviruses, and development of more effective strategies for controlling COVID-19.
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