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- Publisher
- Wiley
- Copyright
- Copyright © 2019 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 0014-2980
- eISSN
- 1521-4141
- DOI
- 10.1002/eji.201847603
- Publisher site
- See Article on Publisher Site
Abstract
Retinoic acid‐inducible gene I (RIG‐I) is a critical RNA virus sensor that initiates antiviral immune response through K63‐linked ubiquitination. In this study, we demonstrated USP14, a deubiquitinating enzyme, as a negative regulator in antiviral responses by directly deubiquitinating K63‐linked RIG‐I. USP14 knockdown significantly enhanced RIG‐I‐triggered type I IFN signaling and inhibited vesicular stomatitis virus (VSV) replication both in mouse peritoneal macrophages and THP1 cells. USP14 overexpression in HeLa cells attenuated RIG‐I‐triggered IFN‐β expression and promoted VSV replication. Besides, USP14‐specific inhibitor, IU1, increased RIG‐I‐mediated type I IFN production and antiviral responses in vitro and in vivo. In addition, USP14 could interact with RIG‐I and remove RIG‐I K63‐linked polyubiquitination chains. This article is the first to report that USP14 acts as a negative regulator in antiviral response through deubiquitinating K63‐linked RIG‐I. These findings provide insights into a potential new therapy targeting USP14 for RNA virus‐related diseases.
Journal
European Journal of Immunology – Wiley
Published: Jan 1, 2019
Keywords: ; ; ; ;