数字农科院2.0

Duck Rig-I Restricts Duck Enteritis V.irus Infection

文献类型： 外文期刊

作者： Huo, H; Wang, Y; Wang, DF; Wang, YP; Chen, XH; Zhao, LL; Chen, HY

作者机构：

关键词： RIG-I; Duck enteritis virus; IFN-beta; STAT1; Antiviral response

期刊名称： VETERINARY MICROBIOLOGY

ISSN： 0378-1135

年卷期： 2019 年 230 卷

页码：

收录情况： JCR（2021版）

摘要： Retinoic acid-inducible gene I (RIG-I) is a nucleic acid sensor that plays a key role in host antiviral defenses. Duck viral enteritis (DEV) is a DNA virus that causes significant economic losses to the poultry industry worldwide. Although RIG-I is known to be involved in a common antiviral signaling pathway triggered by RNA viruses, its role in DEV infection remains unclear. In this study, we demonstrated that DEV infection increased the expression levels of interferon beta (IFN-beta) and RIG-I in ducks both in vivo and in vitro. Furthermore, over-expression of duck RIG-I significantly upregulated the expression of interferon-stimulated genes, including myxovirus resistance protein (Mx), Interferon-induced oligodenylate synthetase-like (OASL) and IFN-beta. We therefore used overexpression and knockdown methods to determine if RIG-I affected DEV infection in ducks. Viral infection was inhibited by RIG-I, and enhanced by knockdown of RIG-I expression using small interfering RNA. RIG-I overexpression also activated signal transducer and activator of transcription 1 (STAT1), as a member of the JAK-STAT family. The combined results following STAT1 knockdown and RIG-I overexpression suggested that the antiviral activity of RIG-I was STAT1-dependent. Overall, these findings indicate that RIG-I effectively restricts DEV replication and may play a vital role in the host immune response to DEV infection in ducks.

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