通过维持细胞毒性T淋巴细胞功能的作用,Slc7a5促进T细胞抗瘤免疫力
Chunwan Lu1, Liyan Liang2, Yanmin Wu2
1School of Life Sciences, Tianjin University, Tianjin, China. Chunwanlu@tju.edu.cn.
Oncogene
|August 26, 2025
概括
三甲的代谢调节了抗瘤免疫力. 通过Slc7a5-Tryptophan路径激活AhR以促进FasL,从而增强CTL对抗瘤的作用. 这为免疫疗法提供了一个新的目标.
科学领域:
- 免疫学
- 癌症生物学
- 代谢途径
背景情况:
- 托芬 (Trp) 的代谢物对抗瘤免疫和免疫治疗反应至关重要.
- 在瘤微环境中的瘤特异性细胞毒性T淋巴细胞 (CTLs) 中Trp的确切作用尚不清楚.
研究的目的:
- 阐明瘤激活的CTL中Trp代谢的机制及其对抗瘤免疫力的影响.
- 研究CTL功能中的Slc7a5-Trp-AhR-FasL轴及其治疗潜力.
主要方法:
- 在共同培养的瘤特异性CTL和瘤细胞中进行全基因组代谢,RNA测序和ATAC测序.
- 在小鼠中药理抑制Slc7a5和遗传缺陷模型.
- scRNA测序,染色体免疫沉和FasL阻塞实验.
- 对人类癌症患者的数据分析,将基因表达与免疫治疗反应和存活率相关联.
主要成果:
- 在瘤激活的CTL中,Trp水平升高,从而上调Slc7a5的表达.
- 抑制Slc7a5降低了Trp的吸收和CTL的活性.
- 特定于T细胞的Slc7a5缺乏导致抗瘤免疫力受损,增加瘤生长和转移.
- 缺少Slc7a5会降低T细胞中的阿里受体 (AhR) 激活和FasL表达.
- 它直接连接到Faslg的发起人.
- FasL阻塞加剧了瘤的进展
- 在人类癌症中,AhR和FasL的表达是相关的,FasL与pembrolizumab的反应和生存有关.
结论:
- 这种Slc7a5-Trp代谢途径对于激活AhR至关重要,该代谢途径对瘤透T细胞中的FasL进行上调,从而维持CTL抗瘤免疫力.
- 向Slc7a5以增强T细胞功能是癌症免疫疗法的有希望的策略,有可能提高CAR-T细胞的疗效.
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