TRIM21 reduces H1N1-induced inflammation and apoptosis by regulating the TBK1-IRF3 signaling pathway in A549 cells

被引:1
|
作者
Yuan, Juan [1 ]
Pan, Jianli [2 ]
Zhang, Xiaofang [1 ]
Gao, Rui [1 ]
机构
[1] Xian Childrens Hosp, Outpatient Infect Dis, 69 Xijuyuan Lane, Xian 710003, Shaanxi, Peoples R China
[2] Xian Childrens Hosp, Special Dept, Xian 710003, Shaanxi, Peoples R China
关键词
INFLUENZA-VIRUS; ACTIVATION; TBK1;
D O I
10.1007/s00705-024-05989-6
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Triple motif protein 21 (TRIM21) has an antiviral function that inhibits various viral infections. However, its role in the progress of influenza A virus (IAV) infection is unclear. In this study, we investigated the role and molecular mechanism of TRIM21 in IAV infection. RT-qPCR was used to determine the level of TRIM21 mRNA, and ELISA was used to measure the levels of IFN-alpha, IFN-beta, IL-6, and TNF-alpha. The levels of the TRIM21, NP, TBK1, IRF3, p-TBK1, and p-IRF3 proteins were estimated by Western blot. The results showed that, after IAV infection, TRIM21 was upregulated in clinical patient serum and A549 cells, and this was correlated with the IFN response. Overexpression of TRIM21 reduced IAV replication and transcription in in vitro cell experiments. TRIM21 also increased IFN-alpha and IFN-beta levels and decreased IL-6 and TNF-alpha levels in A549 cells. In addition, overexpression of TRIM21 inhibited IAV-induced apoptosis. Further experiments demonstrated that TBK1-IRF3 signaling was activated by TRIM21 and was involved in the inhibitory effect of TRIM21 on virus replication. In summary, our study suggests that TRIM21 inhibits viral replication by activating the TBK1-IRF3 signaling pathway, further inhibiting the infection process of IAV.
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页数:10
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