葡萄糖载体5增强CAR-T细胞代谢功能和抗瘤耐用性
Bakir Valentić1,2, Andre Kelly1,2, Alexander A Shestov1,2
1Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Research square
|May 20, 2024
概括
工程 GLUT5 通过利用果糖来增强 CAR-T 细胞的抗瘤功能,改善代谢适应性并克服瘤微环境中的葡萄糖耗尽.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢工程是代谢工程.
- 在瘤学瘤学.
背景情况:
- 激活的T细胞依赖有氧糖解来获得能量.
- 葡萄糖载体 (GLUT) 对T细胞代谢和抗瘤活性至关重要.
- 在T细胞中的果糖代谢,特别是通过GLUT5,对于CAR-T细胞增强仍未得到充分研究.
研究的目的:
- 研究GLUT5作为一种基因工程策略的潜力,以增强富含果糖的瘤微环境中的CAR-T细胞.
- 确定通过GLUT5的果糖代谢是否可以支持T细胞代谢适应性和抗瘤功能,特别是在葡萄糖贫乏的条件下.
主要方法:
- 在T细胞中表达野生型GLUT5,并在无葡萄糖,高果糖条件下评估代谢适应性.
- 利用13C6果糖和稳定状态标记器技术来追踪CAR-T细胞中的糖溶性重编程和TCA变性.
- 进行了细胞毒性测定,并测量了迁移速度,以评估T细胞效应器功能.
- 在AML的异种移植模型中评估了抗瘤疗效.
主要成果:
- 在富含果糖,无葡萄糖的条件下,GLUT5表达恢复了T细胞的代谢适应性,支持最大的糖分分解能力和ATP补充.
- 在扩张过程中,13C6果糖推动了CAR-T细胞糖解和TCA透症.
- 在没有葡萄糖的介质中,GLUT5挽救了T细胞的细胞分解功能,并提高了迁移速度,有助于优越的"撞击逃跑"连续杀戮.
- 在AML异种移植模型中,GLUT5表达改善了抗瘤功能,即使没有外源果糖的管理.
结论:
- 在富含果糖的瘤微环境中,GLUT5增强了CAR-T细胞的弹性和抗瘤功能.
- GLUT5提供了一种新的策略,以克服葡萄糖枯竭并提高CAR-T细胞的疗效.
- 这种代谢工程方法对改善癌症免疫治疗具有直接的翻译相关性.
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