线粒体复合体III产生的超氧化物对于巨细胞中IL-10分泌至关重要
Joshua S Stoolman1, Rogan A Grant1, Leah K Billingham2
1Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
Science advances
|January 22, 2025
概括
线粒体电子运输链复合物III在巨细胞中的缺陷增加了感染和冲击的易感性. 综合体III产生的超氧化物对于在TLR刺激后释放抗炎IL-10至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 线粒体生物学 线粒体生物学
- 细胞呼吸 细胞呼吸
背景情况:
- 线粒体电子运输链 (ETC) 功能影响巨细胞的免疫反应.
- 连接ETC功能与巨细胞免疫的精确机制尚未完全阐明.
研究的目的:
- 研究ETC复合物III (CIII) 在巨细胞免疫反应中的作用.
- 了解CIII缺乏如何影响对病毒感染和内毒性休克的易感性.
主要方法:
- 产生了具有CIII缺乏巨细胞的小鼠.
- 在体外研究中利用骨髓衍生的巨细胞 (BMDMs).
- 用托尔类受体 (TLR) 激素 (TLR3,TLR4) 和细胞因子 (IL-4) 刺激的BMDMs.
- 评估IL-10释放和对A型流感病毒 (IAV) 和脂多糖 (LPS) 的敏感性.
主要成果:
- 患有CIII缺乏巨细胞的小鼠对IAV和LPS诱导的内毒性休克的敏感性增加.
- 缺乏CIII的BMDM在TLR3或TLR4刺激后产生较少的IL-10.
- 用替代氧化酶 (AOX) 恢复呼吸并没有逆转冲击敏感性或恢复IL-10释放.
- 蛋白激酶A (PKA) 的激活在缺乏CIII的BMDM中挽救了IL-10的释放.
- IL-4反应不受CIII缺乏的影响.
结论:
- 线粒体CIII产生的超氧化物对于响应TLR刺激的IL-10释放至关重要.
- 巨细胞中的CIII功能在调节先天免疫反应和宿主防御方面发挥着关键作用.
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