CRISPR 屏幕解码引发 γδ T 细胞检测的癌细胞通路
Murad R Mamedov1,2, Shane Vedova3,4, Jacob W Freimer3,4,5
1Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA. murad.mamedov@ucsf.edu.
Nature
|August 30, 2023
概括
马三角形 (γδ) T 细胞通过识别压力信号来向癌症. 激活AMP激活蛋白激酶 (AMPK) 增强癌细胞的压力信号,增强γδT细胞的杀死.
科学领域:
- 免疫学
- 癌症生物学
- 细胞代谢
背景情况:
- γδ T 细胞是强大的抗癌效应体,可识别转化细胞上的保存压力信号.
- Vγ9Vδ2 T细胞是一个主要的人类 γδ T 细胞子集,在细胞上识别BTN2A1-BTN3A1复合体.
- 癌细胞应激与γδT细胞向的机制尚未完全理解.
研究的目的:
- 在癌细胞中确定调节γδT细胞死亡和BTN3A表达的途径.
- 阐明细胞代谢在γδT细胞中介细胞毒性的作用.
- 探索增强γδT细胞抗癌活性的治疗策略.
主要方法:
- 在目标癌细胞中进行全基因组CRISPR选.
- 对基因表达,蛋白质修饰和膜贩运的分析.
- 对代谢途径中断和AMP激活蛋白激酶 (AMPK) 信号的研究.
- 在细胞系和患者衍生瘤器官模型中评估Vγ9Vδ2T细胞杀死.
主要成果:
- 克里斯普尔查显示BTN3A细胞表面表达和γδT细胞激活的多层调节.
- 破坏癌细胞代谢途径,特别是ATP的产生,改变BTN3A水平.
- 通过代谢压力激活AMPK会诱导BTN2A1和BTN3A的表达.
- 在癌症模型中AMPK激活增加了BTN2A1-BTN3A复合体表达和Vγ9Vδ2T细胞的死亡.
结论:
- 癌细胞中的代谢应激受AMPK介导,可提高BTN2A1-BTN3A复合体的调节.
- 这种依赖AMPK的机制增强了Vγ9Vδ2T细胞的识别和杀死癌细胞.
- 向代谢途径和激活AMPK提供了一种新的策略来促进γδT细胞免疫疗法.
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