对低氧反应的CAR-T细胞在固体瘤中表现出减少疲劳和提高效率
Xiuxiu Zhu1,2, Jun Chen3,4, Wuling Li3,4
1College of Bioengineering, Chongqing University, Chongqing, China.
Cancer research
|October 24, 2023
概括
工程化化学抗原受体 (CAR) -T细胞对瘤缺氧反应,增强抗瘤活性和安全性. 这种对缺氧反应的CAR-T细胞策略提高了固体瘤的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞疗法细胞疗法
背景情况:
- 固体瘤经常表现出缺氧,这种情况会损害化学抗原受体 (CAR) -T细胞功能.
- 在固体瘤中提高CAR-T细胞的疗效和安全性是癌症治疗中的关键挑战.
研究的目的:
- 开发低氧反应的CAR-T细胞,可以专门针对瘤微环境.
- 为了提高CAR-T细胞在固体瘤中的抗瘤功效和安全性.
主要方法:
- 具有低氧反应元件的工程CAR-T细胞 (5H1P-CEA CAR) 调节CAR表达.
- 在正常和缺氧条件下培养和表征缺氧响应的CAR-T细胞.
- 评估T细胞表型,新陈代谢,分化和消耗在体外和体内.
- 在患者衍生异种移植模型中评估了抗瘤活性.
主要成果:
- 低氧反应的CAR-T细胞仍然处于休息状态,在normoxia下CAR表达低.
- 与传统的CAR-T细胞相比,这些细胞的分化减少,氧化代谢增强,增多.
- 在体内表现出T细胞疲劳的减少和T细胞表型的改善.
- 在患者衍生异种移植模型中显示出更持久的抗瘤活性.
结论:
- 对低氧反应的CAR-T细胞提供了一种策略,可以将CAR的表达限制在瘤微环境中,从而提高有效性和安全性.
- 这种方法改善了CAR-T细胞的持久性,功能和固体瘤中的抗瘤活性.
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