通过NKG2D特异性CAR巨细胞的协同天生的适应性免疫力驱动肝细胞癌的持久缓解
Zihao Zhao1,2, Wenjing Zheng2, Yang He3
1Department of Hepatobiliary Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
针对NKG2D连体的工程化化学原体受体巨细胞 (CAR-Ms) 通过增强细胞和免疫激活,有效地消除肝细胞癌 (HCC). 与抗PD-L1疗法的结合进一步改善了HCC清除和生存率.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- 肝细胞癌 (HCC) 免疫治疗因瘤异质性和免疫抑制而面临挑战.
- 化学抗原受体巨细胞 (CAR-Ms) 被设计为向应激诱导的NKG2D配体 (NKG2DLs),这些配体在HCC中表达很高.
研究的目的:
- 研究NKG2DL向CAR-Ms在消除HCC中的有效性.
- 评估CAR-Ms重塑瘤免疫微环境的潜力.
- 评估CAR-Ms与抗PD-L1治疗相结合的协同效应.
主要方法:
- 分析了HCC中的NKG2DL表达及其与患者存活时间的相关性.
- 通过将NKG2D细胞外域与FcγRI信号融合来构建CAR-Ms.
- 在免疫能力较强的小鼠体外和体内研究评估了CAR-M细胞,细胞因子分泌,免疫细胞激活和各种HCC模型中的抗瘤疗效,包括与抗PD-L1.1的联合治疗.
主要成果:
- 在HCC中NKG2DLs显著上调,与预后不佳相关.
- CAR-Ms证明了NKG2DL+ HCC细胞的选择性细胞,偏向到M1表型,并激活了关键信号通路 (PI3K-AKT,cGAS-STING).
- CAR-Ms促进了T细胞的招募和激活,抑制了瘤生长和转移,诱导了持久的免疫记忆,并在正位模型中实现了完整的瘤回归和100%的存活率,没有观察到显著的器官毒性.
结论:
- NKG2D导向的CAR-Ms通过整合先天性细胞化,自适应性免疫激活和髓状细胞重编程,为HCC消除提供了有效的策略.
- 与抗PD-L1的联合治疗通过先天适应性免疫交叉增强了CAR-M的疗效,为HCC免疫疗法提供了一个有前途的新途径.
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