Microrna mir-214 inhibits snakehead Vesiculovirus replication by Promoting iFn-alpha expression via Targeting host adenosine 5 '-Monophosphate-activated Protein Kinase

文献类型： 外文期刊

第一作者： Zhang, Chi

作者： Zhang, Chi;Feng, Shuangshuang;Chen, Nan;Hegazy, Abeer M.;Liu, Xueqin;Lin, Li;Tu, Jiagang;Zhang, Chi;Chen, Wenjie;Zhao, Lijuan;Li, Jun;Lin, Li;Zhang, Wenting;Hegazy, Abeer M.;Li, Jun;Li, Jun;Lin, Li;Tu, Jiagang

作者机构：

关键词： snakehead vesiculovirus;microRNA;miR-214;interferon;replication;adenosine 5'-monophosphateactivated protein kinase

期刊名称：FRONTIERS IN IMMUNOLOGY （ 影响因子：7.561； 五年影响因子：7.624 ）

ISSN： 1664-3224

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： Background: Snakehead vesiculovirus (SHVV), a new rhabdovirus isolated from diseased hybrid snakehead, has emerged as an important pathogen during the past few years in China with great economical losses in snakehead fish cultures. However, little is known about the mechanism of its pathogenicity. MicroRNAs are small noncoding RNAs that posttranscriptionally modulate gene expression and have been indicated to regulate almost all cellular processes. Our previous study has revealed that miR-214 was downregulated upon SHVV infection. Results: The overexpression of miR-214 in striped snakehead (SSN-1) cells inhibited SHVV replication and promoted IFN-alpha expression, while miR-214 inhibitor facilitated SHVV replication and reduced IFN-alpha expression. These findings suggested that miR214 negatively regulated SHVV replication probably through positively regulating IFN-alpha expression. Further investigation revealed that adenosine 5'-monophosphate-activated protein kinase (AMPK) was a target gene of miR-214. Knockdown of AMPK by siRNA inhibited SHVV replication and promoted IFN-alpha expression, suggesting that cellular AMPK positively regulated SHVV replication and negatively regulated IFN-alpha expression. Moreover, we found that siAMPK-mediated inhibition of SHVV replication could be partially restored by miR-214 inhibitor, indicating that miR-214 inhibited SHVV replication at least partially via targeting AMPK. Conclusion: The findings of this study complemented our early study, and provide insights for the mechanism of SHVV pathogenicity. SHVV infection downregulated miR-214, and in turn, the downregulated miR-214 increased the expression of its target gene AMPK, which promoted SHVV replication via reducing IFN-alpha expression. It can therefore assume that cellular circumstance with low level of miR-214 is beneficial for SHVV replication and that SHVV evades host antiviral innate immunity through decreasing IFN-alpha expression via regulating cellular miR-214 expression.

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