经IL-21重编程的Vδ1 T细胞对固体瘤进行杀伤,这种杀伤因CAR武装而增强,用于现成免疫疗法
Ana L Portillo1,2,3, Misaal Mehboob1,2,3, Genesis Snyder4
1Department of Medicine, McMaster University, Hamilton, ON, Canada.
Oncoimmunology
|September 25, 2025
概括
这项研究表明,K562养细胞可以扩展Vδ1 T细胞用于癌症治疗. 这些工程细胞对固体瘤表现出强大的抗瘤活性,提供了潜在的现成治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞疗法细胞疗法
- 在瘤学瘤学.
背景情况:
- 化学抗原受体 (CAR) T细胞疗法,主要使用自身的αβ T细胞,在血液癌症中表现出成功,但由于抗原逃逸,敌对瘤微环境 (TME) 和制造挑战,在固体瘤中面临局限性.
- 玛三角 (γδ) T细胞提供先天的,MHC独立的瘤向,是全基细胞治疗的有前途的候选人.
- Vδ1 T 细胞子集表现出强烈的抗瘤活性,但临床应用受限于实现治疗用途足够的细胞扩张的困难.
研究的目的:
- 为了评估K562料细胞的疗效,该细胞与膜结合的介质素-21 (K562-mb-IL-21) 进行工程,以扩大和激活周围血液的 γδ T 细胞.
- 评估这些扩展的Vδ1 T细胞作为固体瘤的"现成"全源细胞疗法的潜力.
主要方法:
- 利用表达膜结合IL-21 (K562-mb-IL-21) 的K562源细胞培养周围血液单核细胞.
- 分析了扩张的γδ T细胞的表型和功能,包括Vδ1亚群扩张,激活标志物表达和针对癌症细胞系的细胞毒性.
- 评估了患者衍生的瘤TME中扩张的Vδ1 T细胞的代谢功能.
- 设计了带有CAR的Vδ1 T细胞,并在人类卵巢癌的免疫缺陷NRG异种移植模型中评估了它们的疗效.
主要成果:
- K562-mb-IL-21养细胞从外围血液中优先扩展Vδ1 T细胞.
- 扩张的Vδ1 T细胞表现出活性化表型,NK细胞激活受体表达增加.
- 这些细胞表现出对乳腺和卵巢癌细胞的先天性细胞毒性,并在TME中保持了代谢功能.
- 在人类卵巢癌异种移植模型中,CAR工程的Vδ1 T细胞显示出增强的抗瘤疗效.
结论:
- K562-mb-IL-21料细胞提供了一种强大的方法来扩大和激活Vδ1 T细胞.
- 使用这种方法扩展的外周血液Vδ1 T细胞适合用于"现成"的全基细胞治疗固体瘤.
- 这种方法克服了当前用于固体恶性瘤的T细胞疗法的关键局限性.
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