数字农科院2.0

Porcine Ifi16 Negatively Regulates Cgas Signaling Through The Restriction Of Dna Binding And Stimulation

文献类型： 外文期刊

作者： Zheng, WL; Zhou, RY; Li, SJ; He, S; Luo, J; Zhu, MQ; Chen, NA; Chen, HJ; Meurens, F; Zhu, JZ

作者机构：

关键词： Innate Immunity; Dna Sensor; Signaling; Porcine; Mutual Relationship

期刊名称： FRONTIERS IN IMMUNOLOGY

ISSN： 1664-3224

年卷期： 2020 年 11 卷

页码：

收录情况： JCR（2021版）

摘要： The innate immunity DNA sensors have drawn much attention due to their significant importance against the infections with DNA viruses and intracellular bacteria. Among the multiple DNA sensors, IFI16, and cGAS are the two major ones, subjected to extensive studies. However, these two DNA sensors in livestock animals have not been well defined. Here, we studied the porcine IFI16 and cGAS, and their mutual relationship. We found that both enable STING-dependent signaling to downstream IFN upon DNA transfection and HSV-1 infection, and cGAS plays a major role in DNA signaling. In terms of their relationship, IFI16 appeared to interfere with cGAS signaling as deduced from both transfected and knockout cells. Mechanistically, IFI16 competitively binds with agonist DNA and signaling adaptor STING and thereby influences second messenger cGAMP production and downstream gene transcription. Furthermore, the HIN2 domain of porcine IFI16 harbored most of its activity and mediated cGAS inhibition. Thus, this study provides a unique insight into the porcine DNA sensing system.

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