TMEM16F脂 scramblase 通过调节瘤免疫微环境来调节瘤的发生
Menghan Wu1,2, Peishang Shi1,2, Jianmin Huang1
1Institute of Molecular Physiology, Shenzhen Bay Laboratory, Shenzhen 518107, Guangdong, China.
概括
瘤使用TMEM16F暴露脂氨酸 (PS),抑制免疫反应. 抑制这种scramblase会激活抗瘤免疫力,并减少瘤生长,提供一种新的癌症治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 瘤的微环境创造了超越免疫检查点的免疫抑制.
- 瘤利用氨酸氨酸 (PS) 外化,这是一个通常用于亡清除的过程,通过亡模仿来逃避免疫检测.
研究的目的:
- 确定驱动瘤内在PS外部化的分子机制.
- 研究TMEM16F在瘤相关免疫抑制中的作用.
- 评估TMEM16F抑制作为潜在的癌症治疗方法.
主要方法:
- 确定TMEM16F是一种激活的脂混杂酶,负责PS暴露.
- 在癌症模型中利用TMEM16F的基因切除.
- 使用的药理学TMEM16F抑制剂.
- 分析了免疫细胞两极分化 (巨细胞,T细胞) 和细胞因子 (TGF-β1).
- 评估了主要免疫器官中的瘤生长和免疫状态.
主要成果:
- TMEM16F驱动瘤内在的PS外部化,将巨细胞两极分化为免疫抑制M2表型.
- M2巨细胞促进TGF-β1分泌和调节性T细胞扩张,抑制细胞毒性淋巴细胞.
- 对TMEM16F的遗传或药理抑制取消了PS暴露.
- 切除TMEM16F导致了瘤和免疫器官的系统性免疫激活.
- 在TMEM16F向后,在多种癌症模型中观察到瘤生长的抑制.
结论:
- TMEM16F-依赖的脂杂乱是癌症免疫逃避的一个关键机制.
- 向TMEM16F可以逆转瘤诱导的免疫抑制,并激活抗瘤免疫力.
- 抑制TMEM16F代表了癌症治疗的有前途的治疗策略.
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