构成性IL-7信号传递促进了固体瘤微环境中的CAR-NK细胞存活,但损害了瘤控制
Matthew Dysthe1, Ishwar Navin2, Dayenne van Leeuwen2
1Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, Texas, USA.
Journal for immunotherapy of cancer
|July 24, 2025
概括
构成性活跃的互白素-7受体 (C7R) 增强了瘤中化学抗原受体 (CAR) -NK细胞存活率,但长期损害了抗瘤功能. 持续的IL-7信号传递可能会对固体瘤中CAR-NK细胞的疗效产生不利影响.
科学领域:
- 免疫治疗是一种免疫疗法.
- 细胞疗法细胞疗法
- 癌症生物学 癌症生物学
背景情况:
- 化学抗原受体 (CAR) -自然杀手 (NK) 细胞在血液恶性瘤中表现有前途.
- 在瘤微环境 (TME) 中NK细胞的生存和功能差,限制了对固体瘤的疗效.
- 目前对CAR-NK细胞的细胞因子策略存在诸如系统性毒性和旁观者效应等局限性.
研究的目的:
- 为了克服当前细胞因子策略的局限性,通过设计CAR-NK细胞来表达一个构成性活跃的互白素-7受体 (C7R).
- 为了使内在的CAR-NK细胞激活独立于外源信号和旁观者细胞激活.
主要方法:
- 在CAR-NK细胞中同表达C7R.
- 在新型瘤免疫微环境 (TiME) 共同培养系统中评估持久性,抗瘤功能和转录特征.
- 在体内对血液学和固体瘤异种移植的评估.
主要成果:
- 与未得到支持的CAR-NK细胞相比,C7R修饰的CAR-NK细胞在体外显示出增强的瘤杀伤和持久性.
- 在体内,C7R.CAR-NK细胞在神经母细胞外移植中表现出更好的生存和增殖,但与IL-15补充的CAR-NK细胞相比,长期瘤控制较差.
- 基因表达分析显示,慢性C7R信号诱导了压力较大的NK细胞表型,其效应因子功能减弱.
结论:
- 在敌对的TME中,C7R促进了CAR-NK细胞的存活,而不依赖外部信号.
- 通过C7R连续发送IL-7信号,导致体内抗瘤功能较差,突出显示其有害作用.
- 这些发现提供了对优化细胞因子信号传递以增强CAR-NK细胞抗瘤活性的见解.
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