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Updated: Jun 17, 2025

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在巨细胞中,IRF3抑制炎症信号通路,以防止病毒病原体的发生

Sukanya Chakravarty^1,2, Merina Varghese¹, Shumin Fan¹

¹Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Science, Toledo, OH, USA.

Science advances

|August 9, 2024

概括

巨细胞中的干扰素调节因子3 (IRF3) 抑制病毒诱导的肺炎. 在小鼠中IRF3缺乏增加了通过增强炎症反应的呼吸道病毒的易感性和死亡率.

科学领域:

免疫学免疫学免疫学
病毒学病毒学
分子生物学分子生物学

背景情况:

病毒感染引发炎症,导致疾病的严重程度和死亡率.
干扰素调节因子3 (IRF3) 对于先天的抗病毒免疫力至关重要,通过抑制NF-κB来抑制炎症.
调解IRF3在呼吸道病毒感染中的抗炎作用的特定细胞类型尚未完全理解.

研究的目的:

为了确定负责IRF3介导的病毒炎症抑制的细胞.
研究IRF3在呼吸道病毒感染期间控制炎症反应的机制.

主要方法:

使用新设计的条件Irf3小鼠和巨细胞特异性的Irf3淘汰小鼠.
感染了呼吸系统病毒的小鼠,并评估了易感性,死亡率,肺炎和免疫病理.
进行RNA测序 (RNA-seq) 和向信号通路分析.

主要成果:

IRF3小鼠在病毒感染后表现出增加的易感性,死亡率,肺炎和巨细胞透.
特别在巨细胞中删除IRF3的小鼠表现出类似的高度炎症反应和致命性.
RNA-seq揭示了增强的NF-κB依赖基因表达和激活MAPK信号在感染Irf3缺陷的肺部.

结论:

在抑制病毒诱导的肺炎和病变发生方面,IRF3起着至关重要的作用.
在呼吸道病毒感染期间,巨细胞是IRF3抗炎功能的关键细胞媒介.
在巨细胞内,IRF3抑制炎症信号通路,包括NF-κB和MAPK,以防止过度炎症.

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