非正规的MAVS信号通过抑制IL-12来抑制树突细胞驱动的抗瘤免疫力
Lingling Wu1,2, Xiaochuan Hong1,2, Chao Yang2
1Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
Science immunology
|December 1, 2023
概括
主体线粒体抗病毒信号蛋白 (MAVS) 途径通过损害CD8+ T细胞反应促进瘤生长. 树突细胞中MAVS缺陷可以增强抗瘤免疫力和免疫疗法的有效性.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞信号传输 细胞信号传输
背景情况:
- 线粒体抗病毒信号蛋白 (MAVS) 介导的细胞核RNA传感对于先天免疫和瘤免疫性至关重要.
- 主体MAVS信号在塑造抗瘤免疫力的确切作用及其治疗含义仍然不完全理解.
研究的目的:
- 阐明宿主MAVS通路在调节抗瘤免疫力中的功能.
- 研究树突细胞中MAVS缺陷对抗瘤CD8+T细胞反应的影响.
- 探索对抗癌症免疫疗法的树突细胞中MAVS信号的治疗潜力.
主要方法:
- 利用基因剥离模型研究宿主细胞,特别是树突细胞 (DC) 中的MAVS功能.
- 评估了CD8+T细胞的原始化能力和瘤反应性T细胞的反应.
- 分析了细胞因子的产生 (例如IL-12,IFN-γ) 和信号通路 (例如NF-κB).
- 评估瘤对免疫疗法和放射治疗的反应.
主要成果:
- 发现宿主MAVS信号支持瘤生长并抑制抗瘤免疫力.
- 在DC中MAVS缺陷增强了依赖IL-12的方式对瘤反应的CD8+T细胞反应.
- 失去RIG-I/MAVS级联激活了非正规的NF-κB通路,导致DCs增加了IL-12的产生.
- MAVS剥离使瘤对免疫疗法敏感,减弱了辐射抵抗力,改善了效应细胞CD8+T细胞的维护.
结论:
- 主体MAVS通路作为DC驱动抗瘤免疫的负调节者.
- 在DC中准MAVS信号是一种有前途的策略,可以增强抗瘤免疫力并提高癌症免疫疗法的疗效.
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