相关实验视频
Updated: May 14, 2025

Generation of Human Chimeric Antigen Receptor Regulatory T Cells
Published on: January 3, 2025
通过跨膜域优化改进CAR内部化和循环利用,减少CAR-T细胞因子的释放和耗尽
Shufeng Xie1,2, Jinlan Long3, Ruiheng Wang1,2
1Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
优化嵌合式抗原受体T (CAR-T) 细胞的跨膜域可以提高它们的抗瘤疗效. 这种修改减少了CAR-T细胞耗尽和细胞因子释放综合征,改善了B细胞白血病的治疗结果.
科学领域:
- 免疫治疗是一种免疫疗法.
- 细胞疗法 细胞疗法
- 在瘤学瘤学.
背景情况:
- 抗CD19CAR-T细胞疗法对B细胞白血病有效,但面临诸如细胞因子释放综合征和T细胞衰竭等挑战.
- 优化CAR内部化和回收是一种有前途的策略,可以提高CAR-T细胞的疗效.
- 超膜域是一个关键的,但尚未被探索的,用于调节CAR动态的动机.
研究的目的:
- 研究跨膜域设计对CAR-T细胞功能的影响.
- 通过优化跨膜域来增强CAR-T细胞的疗效.
主要方法:
- 使用lentivirus生成构建了两个不同的跨膜CAR-T细胞 (19CAR-T1a和19CAR-T8a).
- 通过共同培养试验评估了CAR动态,激活,耗尽标记,线粒体功能和差异化.
- 利用免疫光显微镜,RNA测序和体内小鼠研究来评估CAR-T细胞的性能.
主要成果:
- 19CAR-T1a) 细胞表现出较低的表面CAR表达,更快的内化和较高的回收率相比19CAR-T8α).
- 内化 19CAR ((1a) 与早期/循环内体相比,表现出偏好的共局部化.
- 19CAR-T ((1a) 显示活性降低,细胞因子释放降低,疲劳标记降低,以及体内抗瘤功效优越.
结论:
- 超膜域极大地影响CAR-T细胞的功能,影响内部化,循环,最终,治疗疗效.
- 优化的跨膜域可以减轻诸如细胞因子释放综合征和T细胞枯竭等不良影响.
- 这项研究为CAR设计提供了一个新的方向,以改善基于CAR-T细胞的癌症疗法.
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