结合结合亲和力和强力信号,可以实现合理的CAR设计,用于增强T细胞功能
Markus Barden1, Patrick Ronan Elsenbroich1, Vivian Haas2
1Division of Genetic Immunotherapy, Leibniz Institute for Immunotherapy, Regensburg, Germany.
调整嵌合抗原受体 (CAR) T细胞功能是固体瘤治疗的关键. 受到疏水性相互作用影响的CAR结合亲和和和强化信号,对于持续的T细胞活性和瘤控制至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 生物化学 生物化学
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对血液性恶性瘤有希望,但在固体瘤中面临挑战.
- 优化CAR T细胞功能对于提高对固体瘤的疗效至关重要.
研究的目的:
- 在固体瘤治疗中研究CAR结合亲和力,增强信号和T细胞功能之间的关系.
- 探索水相互作用在CAR T细胞激发和信号传递中的作用.
主要方法:
- 利用了一个翻译管道,涉及CAR结合部分的生物物理特征和结构预测.
- 在重复的目标挑战下评估细胞狂热度,突触形成,T细胞运动性和功能能力.
- 在临床前模型中评估了持续的瘤控制.
主要成果:
- 衍生出具有4-log亲和度范围的抗Her2 CARs,表明scFv突变影响亲和度,狂热度和强力信号传递.
- 观察到一个非线性关系之间增加的亲和力和功能狂热度超过最低门.
- 发现scFv内部的疏水性相互作用增加了亲和力,非特异性结合和增强信号,影响T细胞的功能.
结论:
- 音调信号可以由scFv中的疏水相互作用驱动,而不仅仅是正电荷.
- 在抗原再挑战和长期瘤控制期间,CAR结合亲和度超过值和强化信号对持续的T细胞功能至关重要.
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