化学抗原受体向它们的目标传递共刺激域依赖的皮科纽顿力
Hemakshi J Mishra1, Lauren Mahoney2, Dominique R Smith1
1Biophysics Ph.D. Program, University of Wisconsin-Madison, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
化学抗原受体 (CAR) T细胞通过它们的合成受体传递力量,这种现象与早期的T细胞激活有关. 这种机械生物学对于理解癌症治疗中的CAR T细胞功能至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 化学抗原受体 (CAR) T细胞是为癌症治疗而设计的免疫细胞.
- 原生T细胞利用机械力量进行信号传递,但CAR T细胞的力量仍然未得到量化.
- 机械活性越来越多地被认为对CAR T细胞功能很重要.
研究的目的:
- 直接测量由CAR T细胞传递的力.
- 研究CAR T细胞力量与早期信号事件之间的关系.
- 为了确定影响CAR介导力传输的因素.
主要方法:
- 使用基于DNA的分子张力探针 (MTP) 连接到CAR标配体.
- 通过临床相关的CAR传递的测量力 (CD123,CD33,CD19).
- 评估了细胞内共刺激域和TCR信号机制的作用.
主要成果:
- 卡尔-T细胞传递的作用因子聚合依赖的力量范围从4.7-19 pN.
- 在多个CAR目标和结构中证明了力量传递.
- 细胞内共刺激域是CAR介导力的关键决定因素;第一代CAR缺乏可测量的力传递.
- 卡力在Ca2+信号发送之前,与TCR信号通路酸化相关.
结论:
- 通过CAR介导的机械生物学是早期CAR T细胞激活的一个重要因素.
- 卡尔-T细胞力量与生化信号级联联系在一起,为卡尔-T细胞功能提供了新的见解.
- 了解CAR T细胞机械生物学可能会提高基于CAR T细胞的癌症免疫疗法的疗效.
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