菌根CpsA通过cGAS介导的通路激活巨细胞中的I型IFN信号传递
Yue Ding1, Jingfeng Tong1, Geyang Luo1
1Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China.
iScience
|May 20, 2024
概括
在感染期间启动I型干扰素 (IFN) 生产时,Mycobacterium结核病蛋白CpsA是必不可少的. 通过影响cGAS-TBK1-IRF3通路和体完整性,CpsA缺乏会损害IFN表达.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 病原发生和发病的过程.
背景情况:
- I型干扰素 (IFN) 的产生在结核病 (TB) 发病过程中至关重要.
- 在结核病中触发IFN产生的细菌因素尚未完全理解.
- 来自Mycobacterium物种的蛋白质CpsA,以其毒性和抑制宿主细胞过程而闻名.
研究的目的:
- 调查CpsA在发病菌菌感染期间启动I型IFN产生中的作用.
- 阐明CpsA影响IFN表达的分子机制.
主要方法:
- 在*Mycobacterium marinum*和*Mycobacterium tuberculosis*中使用了CpsA全删除突变研究.
- 在感染的巨细胞 *in vitro* 和斑马鱼和小鼠 *in vivo* 中评估了IFN产量.
- 分析了cGAS-TBK1-IRF3通路,TBK1/IRF3酸化和细胞质DNA水平.
主要成果:
- 在感染的巨细胞,斑马鱼和小鼠中,CpsA缺陷显著降低了I型IFN的产生.
- 缺乏CpsA的菌株显示TBK1和IRF3的酸化降低,表明cGAS-TBK1-IRF3通路激活受损.
- 由于CpsA缺乏,细胞质DNA水平降低,并导致体膜破裂受损.
结论:
- 菌根菌CpsA在诱导I型IFN产生方面发挥了新且至关重要的作用.
- CpsA通过cGAS-TBK1-IRF3途径影响I型IFN表达,并通过影响体完整性.
- 这些发现为真菌菌菌病原和宿主免疫反应的机制提供了新的见解.
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