克服细胞外囊泡介导的兄弟杀伤可以改善对抗固体瘤的CAR T细胞治疗
Wenqun Zhong1, Zhiyuan Qin1, Ziyan Yu1
1Department of Biology, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA.
Nature cancer
|April 15, 2025
概括
固体瘤会通过细胞外囊泡引起化学抗原受体 (CAR) T细胞兄弟杀伤. 用Serpin B9对CAR T细胞进行装甲,可以提高它们的抗瘤能力和生存率,从而提高癌症治疗的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对固体瘤的疗效有限.
- 固体瘤中CAR-T细胞耐药性的机制尚未完全理解.
- 需要新的策略来增强CAR T细胞功能并克服耐药性.
研究的目的:
- 阐明固体瘤中CAR T细胞抵抗的分子机制.
- 开发和评估具有改善抗瘤活性的工程CAR T细胞.
- 研究塞尔B9作为防护剂对抗CAR T细胞兄弟杀伤的潜力.
主要方法:
- 实体瘤对CAR T细胞的反应中细胞外囊泡分泌的分析.
- 瘤抗原从细胞外囊中的水平转移到CAR T细胞.
- 工程CAR T细胞与塞尔B9一起,它是一种大酶B抑制剂.
- 使用雌性小鼠进行体内研究,以评估CAR T细胞活力,瘤透和抗瘤活性.
- 用Serpin B9装甲CAR T细胞和抗编程死亡1抗体进行组合治疗.
主要成果:
- 固体瘤调高携带瘤抗原的小细胞外囊泡,导致CAR T细胞兄弟杀伤.
- 装有Serpin B9的工程CAR T细胞表现出减少兄弟杀戮和增强的活力.
- 塞尔B9装甲的CAR T细胞在体内表现出改善的瘤透和抗瘤活性.
- 塞尔B9装甲CAR T细胞与抗PD-1抗体的联合疗法在治疗固体瘤方面表现出优异的疗效.
结论:
- 通过细胞外囊泡水平转移瘤抗原诱导CAR T细胞兄弟杀伤,限制对固体瘤的疗效.
- 用Serpin B9对CAR T细胞进行装甲,可以有效地减轻兄弟杀伤,增强它们的抗瘤功能.
- 塞尔B9装甲CAR T细胞代表了对固体瘤的有前途的治疗策略,特别是当与免疫检查点抑制剂相结合时.
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