cGAS-STING-NF-κB轴通过线粒体DNA释放调解轮激素诱导的NLRP3炎症酶激活
Yewon Mun1, Juseo Kim1, You-Jin Choi2
1College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea.
Antioxidants (Basel, Switzerland)
|November 27, 2025
概括
轮通过激活cGAS-STING通路引发炎症,从而导致NLRP3炎症酶激活. 这种线粒体功能障碍途径涉及活性氧物种和线粒体DNA释放,促进细胞信号传递.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 轮抑制了线粒体复合体I,导致反应性氧物种 (ROS) 生产和炎症.
- 线粒体功能障碍与NLRP3炎症体等炎症信号通路之间的联系尚未完全理解.
研究的目的:
- 调查cGAS-STING通路在罗诺诱导的NLRP3炎症酶激活中的作用.
- 阐明将线粒体功能障碍与巨细胞炎症联系起来的分子机制.
主要方法:
- 使用PMA分化的TPH-1巨细胞,用罗特治疗.
- 通过蛋白质表达和酸化评估cGAS-STING通路的激活 (STING,TBK1).
- 测量了NF-κB核转位,NLRP3炎酶原始化和IL-1β分泌. 使用的STING抑制剂 (H-151) 和线粒体透性过渡孔抑制剂 (环素A).
主要成果:
- 轮激活了cGAS-STING通路,增加了cGAS表达和STING/TBK1酸化.
- 这导致NF-κB核转移,NLRP3上调和IL-1β分泌.
- 抑制STING或线粒体ROS产生 (通过环素A) 减弱了罗农诱导的炎症酶激活和IL-1β释放.
结论:
- 轮通过线粒体ROS依赖的线粒体DNA (mtDNA) 释放激活NLRP3炎症体.
- 释放的mtDNA激活了cGAS-STING-NF-κB信号轴,导致炎症酶激活.
- 这项研究揭示了一种新的机制,通过cGAS-STING通路将线粒体功能障碍与先天免疫激活联系起来.
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