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T cell fate following Salmonella infection is determined by a STING-IRF1 signaling axis in mice.
Communications Biology ( IF 5.2 ) Pub Date : 2019-12-11 , DOI: 10.1038/s42003-019-0701-2
Sung-Moo Park 1 , Tatsushi Omatsu 1 , Yun Zhao 1 , Naohiro Yoshida 1 , Pankaj Shah 1 , Rachid Zagani 1 , Hans-Christian Reinecker 1
Affiliation  

The innate immune response following infection with entero-invasive bacterial species is triggered upon release of cyclic di-guanylate monophosphate (c-di-GMP) into the host cell cytosol. Bacterial c-di-GMP activates the intracellular Sensor Stimulator of Interferon Genes (STING), encoded by Tmem173 in mice. Here we identify Interferon Regulatory Factor (IRF) 1 as a critical effector of STING-mediated microbial DNA sensing that is responsible for TH17 cell generation in the mucosal immune system. We find that STING activation induces IRF1-dependent transcriptional programs in dendritic cells (DCs) that define T cell fate determination, including induction of Gasdermin D, IL-1 family member cytokines, and enzymes for eicosanoid synthesis. Our results show that IRF1-dependent transcriptional programs in DCs are a prerequisite for antigen-specific TH17 subspecification in response to microbial c-di-GMP and Salmonella typhimurium infection. Our identification of a STING-IRF1 signaling axis for adaptive host defense control will aid further understanding of infectious disease mechanisms.

中文翻译:


沙门氏菌感染后 T 细胞的命运由小鼠中的 STING-IRF1 信号轴决定。



肠道侵入性细菌感染后,环状二鸟苷酸单磷酸 (c-di-GMP) 释放到宿主细胞胞质中,从而引发先天免疫反应。细菌 c-di-GMP 激活小鼠体内由 Tmem173 编码的细胞内干扰素基因传感器刺激器 (STING)。在这里,我们将干扰素调节因子 (IRF) 1 确定为 STING 介导的微生物 DNA 传感的关键效应器,负责粘膜免疫系统中 TH17 细胞的生成。我们发现,STING 激活会在树突状细胞 (DC) 中诱导 IRF1 依赖性转录程序,从而决定 T 细胞的命运,包括诱导 Gasdermin D、IL-1 家族成员细胞因子和类二十烷酸合成酶。我们的结果表明,DC 中 IRF1 依赖性转录程序是响应微生物 c-di-GMP 和鼠伤寒沙门氏菌感染而进行抗原特异性 TH17 亚特异性的先决条件。我们鉴定出用于适应性宿主防御控制的 STING-IRF1 信号轴将有助于进一步了解传染病机制。
更新日期:2019-12-11
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