释放车:CTLA-4损耗轮增压CAR-T电池
Roland C Schelker1, Luca Gattinoni2
1Division of Functional Immune Cell Modulation, Leibniz Institute for Immunotherapy, Regensburg, Germany; Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.
Immunity
|October 11, 2023
概括
通过CRISPR/Cas9删除CTLA4,可以恢复CAR-T细胞的适应性和抗瘤功能,克服免疫检查点引起的治疗失败. 这种方法增强了CD28信号传输,提高了CAR T细胞治疗的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症治疗 癌症治疗
- 基因编辑 基因编辑
背景情况:
- 免疫检查点受体,如CTLA4和PDCD1,诱导T细胞功能障碍,导致CAR T细胞治疗失败.
- 恢复T细胞健康对于有效的CAR T细胞治疗癌症至关重要.
研究的目的:
- 研究CRISPR/Cas9介导的CTLA4和/或PDCD1基因删除对CAR T细胞功能的影响.
- 确定增强CD28信号是否可以恢复CAR-T细胞中的抗瘤活性,特别是在以前治疗失败的患者中.
主要方法:
- 利用CRISPR/Cas9基因编辑来删除CAR T细胞中的CTLA4,PDCD1或两者.
- 评估了CD28信号通路和T细胞适应性后基因编辑.
- 在相关模型中评估修改的CAR T细胞的抗瘤功能,包括那些没有反应的患者.
主要成果:
- 通过CRISPR/Cas9删除CTLA4,显著增强了CD28信号传递,并恢复了CAR T细胞的适应性.
- 删除CTLA4,但不能删除PDCD1或两者,导致CAR T细胞的抗瘤功能得到改善.
- 这些功能性改善甚至在来自以前未能接受CAR T细胞治疗的患者的CAR T细胞中也被观察到.
结论:
- 在CAR T细胞治疗中,CTLA4删除是克服免疫检查点诱导的T细胞功能障碍的有希望的策略.
- 向CTLA4可以恢复CAR T细胞的适应性和抗瘤功效,为耐治疗癌症提供潜在的解决方案.
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