癌症抑制了巨细胞中的线粒体伴侣活动,以驱动免疫逃避
Haoxin Zhao1,2, Jaeoh Park3,4, Yuzhu Wang5,6
1Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, OH, USA.
Nature immunology
|October 30, 2025
概括
瘤相关巨细胞 (TAMs) 使用TRAP1 (TNF受体相关蛋白-1) 来限制它们的抑制功能. 恢复TRAP1重新编程TAMs,增强抗瘤免疫力并破坏瘤微环境中的免疫逃避.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 癌症生物学 癌症生物学
背景情况:
- 与瘤相关的巨细胞 (TAMs) 通过在营养有限的瘤微环境 (TME) 中维持线粒体活动来促进瘤免疫逃避.
- T细胞中的功能失调的线粒体与TAMs中保存的线粒体功能形成对比,有助于免疫抑制.
研究的目的:
- 在TME中确定调节TAM功能的代谢检查点.
- 研究TNF受体相关蛋白-1 (TRAP1) 在控制巨细胞代谢和免疫抑制活性中的作用.
主要方法:
- 研究了TRAP1在TAM中作为线粒体陪伴者和代谢调节者的作用.
- 分析了TRAP1下调通过TIM4-AMPK信号传递对巨细胞功能和线粒体平衡的影响.
- 研究了TRAP1抑制对电子运输链活性,α-甲酸/糖酸盐比率以及JMJD3介导的表观遗传修饰的影响.
主要成果:
- TRAP1充当代谢检查点,抑制氧化呼吸和限制TAM抑制功能.
- 在TME中降低TRAP1的调节增强了巨细胞的免疫抑制活性,降低了前炎症能力,并促进了瘤的免疫逃逸.
- 抑制TRAP1增加了线粒体电子运输链的活动,改变了α-甲酸/糖酸盐的比率,并促进了JMJD3介导的基因素脱甲基化,加强了免疫抑制.
结论:
- TRAP1是一个关键的调节器,整合了TAM功能的代谢和表观遗传控制.
- 通过针对TIM4和JMJD3恢复TRAP1,重编程TAM,破坏免疫逃避TME,并增强抗瘤免疫力.
- TRAP1通路代表了癌症免疫治疗的有前途的治疗标.
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