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The Endoribonuclease Activity Essential for the Nonstructural Protein 11 of Porcine Reproductive and Respiratory Syndrome Virus to Inhibit NLRP3 Inflammasome- Mediated IL-1 beta Induction

文献类型： 外文期刊

作者： Wang, Chao 1 ; Shi, Xibao 2 ; Zhang, Xiaozhuan 3 ; Wang, Aiping 4 ; Wang, Li 2 ; Chen, Jing 2 ; Deng, Ruiguang 2 ; Zhang, 1 ;

作者机构： 1.Northwest A&F Univ, Coll Vet Med, Yangling, Peoples R China

2.Henan Acad Agr Sci, Henan Prov Key Lab Anim Immunol, Zhengzhou, Peoples R China

3.Henan Normal Univ, Coll Life Sci, Xinxiang, Peoples R China

4.Zhengzhou Univ, Dept Bioengn, Zhengzhou 450052, Peoples R China

5.Henan Agr Univ, Coll Anim Sci & Vet Med, Zhengzhou 450002, Peoples R China

期刊名称：DNA AND CELL BIOLOGY （ 影响因子：3.311； 五年影响因子：3.557 ）

ISSN： 1044-5498

年卷期： 2015 年 34 卷 12 期

页码：

收录情况： SCI

摘要： NLRP3 inflammasome, which is multiprotein complex that induces the maturity and secretion of proinflammatory interleukin-1 (IL-1), takes a bridge between the innate and adaptive immune responses to the invading pathogens. It has been shown that porcine reproductive and respiratory syndrome virus (PRRSV) could activate the NLRP3 inflammasome but induce the host's immunosuppression. This study aims to explore whether PRRSV could encode the component to antagonize the NLRP3 inflammasome. The obtained results showed that PRRSV could induce the expression and secretion of IL-1 in early infection through the pathway of NLRP3 inflammasome in porcine alveolar macrophages (PAMs), but the levels of pro-IL-1 mRNA and IL-1 protein decreased to a degree that was similar to the level of the mock-infected group in later infection. This work also found that PRRSV nonstructural protein (nsp) 11 could inhibit the expression of pro-IL-1 mRNA induced by lipopolysaccharide (LPS) and the secretion of IL-1 induced by LPS plus nigericin in PAMs. Furthermore, the mutation studies showed that the endoribonuclease activity was essential for nsp11 to inhibit the secretion of IL-1. Therefore, it could be indicated that PRRSV could induce the activation of NLRP3 inflammasome, but the virus encoded nsp11 to inhibit this action.

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