双重定位CD133/PD-L1 CAR-T加上αPD-1克服了免疫抑制的微环境,并通过诱导组织内存表型的组织内存表型,通过辐射预调强化
Zhuoran Yao1, Kai Kang1, Pei-Heng Li2
1Division of Thoracic Tumor Multimodality Treatment and Department of Radiation Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China; Laboratory of Clinical Cell Therapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
概括
一种新型的双向嵌合抗原受体 (CAR) T细胞疗法,结合了CD133和PD-L1向,通过PD-1阻断和辐射增强,显示出治疗固体瘤的重大前景.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- 固体瘤需要创新的嵌合抗原受体 (CAR) T细胞策略来改善治疗结果.
- 现有的CAR T细胞疗法在固体瘤微环境中面临挑战.
研究的目的:
- 开发和评估一种新的双向CAR T细胞疗法,用于CD133阳性瘤.
- 评估将这种双重向的CAR T细胞疗法与PD-1阻断和辐射预调剂相结合的疗效.
主要方法:
- 开发一种双向的CAR T细胞疗法,结合alphaPDL1.CD28和alphaCD133的CAR结构.
- 在小鼠模型中评估CAR T细胞激活,细胞毒性功能和体内抗瘤疗效.
- 组合治疗的评估,包括PD-1阻断和辐射预调.
主要成果:
- 双重向的CAR T细胞表现出对CD133+瘤的增强激活和细胞毒性功能.
- 结合PD-1阻断,通过破坏抑制信号,延长了治疗疗效.
- 辐射预调 (10Gy或4Gy) 最大化了抗瘤效果,导致瘤完全回归.
- 辐射诱导了一种组织内存CAR T细胞表型 (CXCR6+,CD103+),可能与瘤细胞上的辐射诱导的E-cadherin相互作用.
结论:
- 一种新的双向CD133/PD-L1 CAR T细胞疗法已成功开发.
- 双重向的CAR T细胞,PD-1阻塞和辐射的三重组合显示出对固体瘤的显著治疗潜力.
- 辐射预调可以诱导由组织内存CAR T细胞介导的强有力的抗瘤免疫反应.
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