细胞内在的PD-L1剥离维持了效应器CD8+T细胞的反应,并促进了抗瘤T细胞治疗
Xinran Wang1, Lu Lu2, Xiaochuan Hong3
1Department of Obstetrics and Gynecology, Shanghai Key Laboratory of Gynecologic Oncology, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
Cell reports
|January 31, 2024
概括
细胞内编程细胞死亡配体1 (PD-L1) 损害了癌症中治疗性CD8+T细胞功能. 破坏内在的PD-L1增强了抗瘤免疫力,提供了一种新的免疫治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞疗法细胞疗法
背景情况:
- 收养细胞疗法通过重编程T细胞来增强抗瘤反应.
- 表面编程细胞死亡连接体1 (PD-L1) /编程细胞死亡蛋白1 (PD-1) 的接触抑制了抗瘤免疫力.
- 细胞内在PD-L1在采用T细胞治疗中的作用尚不清楚.
研究的目的:
- 研究细胞内PD-L1在治疗性CD8+T细胞中的作用.
- 确定是否准细胞内在的PD-L1可以提高采用T细胞治疗的疗效.
- 探索内在PD-L1影响T细胞功能的机制.
主要方法:
- 来自癌症患者的瘤透CD8+T细胞的分析.
- 在治疗性CD8+T细胞中对PD-L1进行基因切除.
- 评估T细胞扩张,功能和效应器样状态的维持.
- 研究mTORC1信号通路的研究.
- 在治疗后对内源性抗瘤免疫反应的评估.
主要成果:
- 细胞内PD-L1富含瘤透的CD8+ T细胞.
- PD-L1 除增强了抗瘤免疫反应和效应器样状态的维持.
- 表面PD-L1阻塞没有影响治疗T细胞扩张或功能.
- 细胞内在的PD-L1阻碍了CD8+T细胞的活性,部分是通过mTORC1信号传递.
- 缺乏PD-L1的T细胞促进了由BATF3驱动的树突细胞介导的内源性抗瘤反应.
结论:
- 细胞内在的PD-L1有助于癌症中的治疗性CD8+T细胞功能障碍.
- 在CD8+T细胞中破坏细胞内在的PD-L1是增强采用细胞疗法的有希望的策略.
- 准细胞内PD-L1为改善癌症免疫治疗结果提供了一种新的方法.
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