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- W2907212535 abstract "Albeit microRNAs (miRNAs) have become increasingly appreciated for their essential roles in innate immune responses to viral infections; however, it is unknown how host miRNAs regulate influenza A virus (IAV)-induced inflammation. The aim of our study was to investigate the role of miR-146a in IAV replication in vitro and in vivo. In vitro, we found miR-146a was significantly upregulated in A549 cells with IAV infection. Overexpression of miR-146a promoted IAV replication, while downregulation of miR-146a repressed replication. We found that miR-146a diminished type I interferon (IFN) responses by decreasing IFN-β production and IFN-stimulated gene (ISG) expression. Furthermore, we found the IFNs level and IAV replication regulated by miR-146a inhibitor was partially reversed by depletion of interferon receptor (IFNAR) 1 or 2. In addition, we found that miR-146a directly targets tumor necrosis factor receptor association factor 6 (TRAF6), which is involved in the production of type I IFN, and TRAF6 overexpression reversed the replication-promoting effect of miR-146a on IAV. In vivo, inhibition of miR-146a alleviated IAV-induced mice lung injury and promoted survival rates by promoting type I antiviral activities. It is, therefore, concluded that downregulation of miR-146a inhibits IAV replication by enhancing type I IFN response through its target gene TRAF6 in vitro and in vivo, suggesting miR-146a antagomir might be a potential therapeutic target during IAV infection." @default.
- W2907212535 created "2019-01-11" @default.
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- W2907212535 date "2019-03-01" @default.
- W2907212535 modified "2023-09-26" @default.
- W2907212535 title "Downregulation of miR-146a inhibits influenza A virus replication by enhancing the type I interferon response in vitro and in vivo" @default.
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- W2907212535 doi "https://doi.org/10.1016/j.biopha.2018.12.103" @default.
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