微调亲和度和间隔设计增强DLL3和BCMA CAR T细胞中的T细胞功效
Nicholas Mazzanti1,2, Ninkka Tamot1, Andrea Francese1
1Therapeutics Discovery, Johnson & Johnson Innovative Medicine, Spring House, PA, USA.
mAbs
|December 12, 2025
概括
优化仿真抗原受体 (CAR) T细胞疗法包括改进CAR设计. 具有中间间隔器的高亲和性CAR显示出优异的瘤杀伤和T细胞扩张对BCMA和DLL3标.
科学领域:
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
- 在瘤学瘤学.
背景情况:
- 化学抗原受体 (CAR) T细胞疗法已获得FDA对血液恶性瘤的批准.
- 与B细胞恶性瘤相比,CAR T细胞的疗效在固体瘤中是有限的.
- 包括抗原结合亲和力和间隔器长度在内的CAR结构设计对T细胞功能产生了关键影响.
研究的目的:
- 为了评估针对BCMA和DLL3瘤抗原的亲和变异和间隔变异CARs.
- 确定CAR设计元素如何影响T细胞效应器功能和治疗效果.
- 建立一个合理的CAR设计框架,以扩大临床应用.
主要方法:
- 生成的CAR具有不同的抗原结合亲和度 (181 pM到407 nM KD) 和间隔器长度.
- 评估了CAR T细胞抗原结合特性和效应器功能在体外.
- 被挑战的CAR T细胞具有BCMA+和DLL3+瘤球体.
主要成果:
- 具有中间间距 (230AA) 的更高亲和力CARs (KD> ~100nM) 证明了优异的瘤杀伤.
- 这些CAR设计还促进了增强的CAR+T细胞扩张和促炎性细胞因子的产生.
- 结合试验中最强的细胞亲和力与改善的T细胞功能性能相关.
结论:
- CAR设计,特别是高亲和度和中间间距长度,对于增强T细胞功能至关重要.
- 优化的CAR构造显示出对BCMA和DLL3目标的优越性能.
- 这些发现为改善CAR T细胞疗法为更广泛的瘤应用提供了基础.
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