在瘤透的Treg中,YAP通过在硬基质上升调Lars2来增强线粒体OXPHOS
Jingchao Bai1,2,3, Meinan Yan1,2,3, Yihan Xu1,2,3
1Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute & Hospital, Tianjin, China.
瘤透调节T细胞 (TI-Tregs) 通过通过YAP增加线粒体OXPHOS来适应瘤微环境. 缺乏YAP或低素饮食会损害TI-Treg功能,提供一种新的瘤治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 代谢重编程 代谢重编程
背景情况:
- 瘤透调节T细胞 (TI-Tregs) 在瘤微环境 (TME) 中将新陈代谢重新编程为氧化酸化 (OXPHOS).
- 像YAP这样的机械传感器由细胞外基质激活,并可能调节TI-Treg代谢.
- YAP在TI-Treg线粒体功能中的作用尚不清楚.
研究的目的:
- 调查YAP在调节TI-Treg线粒体功能中对矩阵刚性的反应中的作用.
- 阐明YAP影响TI-Treg代谢的潜在分子机制.
- 探索YAP抑制和饮食干预作为潜在的抗瘤策略.
主要方法:
- 在不同的矩阵刚度下研究了TI-Tregs中的YAP激活in vitro和in vivo.
- 使用了YAP条件淘汰赛小鼠和各种分子技术 (RNA-seq,qPCR,流细胞计,线粒体检测).
- 在携带瘤的小鼠中评估了YAP抑制剂与低素饮食相结合的治疗潜力.
主要成果:
- 通过TI-Tregs的矩阵刚性激活YAP,并且通过线粒体OXPHOS对它们的免疫抑制功能至关重要.
- YAP对线粒体Lars2转录进行上调,这对于TI-Tregs中线粒体蛋白转化至关重要.
- 结合YAP抑制和低氨酸饮食协同诱导TI-Tregs中的线粒体功能障碍,抑制瘤生长.
结论:
- YAP作为一个关键的机械传感器,将矩阵刚性与TI-Treg线粒体功能联系起来.
- 准YAP和白代谢是一种有前途的瘤治疗联合策略.
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