甲素B会导致托戈细胞结合中介的CAR-T细胞功能障碍
Kenneth A Dietze1, Kiet Nguyen2, Aashli Pathni3
1Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA.
bioRxiv : the preprint server for biology
|June 25, 2024
概括
化学抗原受体 (CAR) T细胞疗法面临由于CAR介导的细胞分裂 (CMT) 的复发. 抑制甲素B (CTSB) 防止CMT诱导的CAR T细胞耗尽和兄弟杀伤,改善CAR T细胞的持久性.
科学领域:
- 免疫治疗是一种免疫疗法.
- 癌症生物学 癌症生物学
- 细胞机制 细胞机制
背景情况:
- 化学抗原受体 (CAR) T细胞疗法显示出前景,但患者患有复发.
- CAR介导的输血细胞 (CMT) 是一种被提议的瘤逃生机制,导致抗原损失和CAR T细胞功能障碍.
- 在CAR T细胞衰竭中CMT的确切作用及其潜在的分子驱动因素尚未完全理解.
研究的目的:
- 调查CMT是否直接导致CAR T细胞功能障碍 (兄弟杀伤和疲劳).
- 确定负责CMT的分子机制.
- 探索针对CMT的治疗策略,以提高CAR T细胞的疗效.
主要方法:
- 使用选择性降解剂从CAR T细胞中去除细胞抗原.
- 进行了高通量小分子选试验,以确定CMT调节器.
- 评估了与CMT和cathepsin B (CTSB) 活动相关的CAR T细胞兄弟杀伤,疲劳和持久性.
主要成果:
- 在CAR-T细胞上的细胞抗原直接诱导CAR-T细胞的兄弟杀戮和疲.
- 鉴定出囊蛋白酶甲素B (CTSB) 对于CMT至关重要.
- 抑制CTSB有效地防止了CAR T细胞的兄弟杀戮和枯竭,将CMT与细胞毒性活动分开.
结论:
- CMT是CAR T细胞功能障碍和复发的直接原因.
- CTSB活动对CMT至关重要,并对CAR T细胞持久性产生负面影响.
- 向CTSB提供了一种潜在的策略,通过提高CAR T细胞的持久性和有效性来改善CAR T细胞治疗结果.
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