通过增强的TRAF介导的TNF信号传递,HVEM辅助刺激域增强了CAR T细胞对固体瘤的疗效
Shishuo Sun1,2,3, Wanxin Zhao1, Yibing Liang1
1Cancer Institute, Cellular Therapeutics School of Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, P.R. China.
Cell communication and signaling : CCS
|January 8, 2026
概括
疹病毒进入介导体 (HVEM) 协同刺激域通过促进TNF信号传递和T细胞代谢,显著增强仿真抗原受体 (CAR) T细胞对固体瘤的疗效. 这项研究表明,HVEM的优势超过4-1BB,改善了CAR T细胞治疗.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 化学抗原受体 (CAR) T细胞疗法在血液癌症中表现有前途,但在固体瘤中面临挑战.
- 疹病毒进入媒介 (HVEM) 是一种共刺激分子,可以增强CAR T细胞活性,尽管其在固体瘤中的机制尚未完全理解.
研究的目的:
- 在实体瘤模型中,研究基于HVEM的CAR T细胞在实体瘤模型中优于基于4-1BB的CAR T细胞的机制.
- 为了比较与不同协同刺激域 (4-1BB,野生型HVEM和突变HVEM) 设计的CAR T细胞的疗效.
主要方法:
- 设计的第二代CAR T细胞以4-1BB,野生类型 (WT) HVEM或AVEE突变 (MUT) HVEM共刺激域为目标.
- 在实验室中评估了细胞毒性,细胞因子释放,信号通路 (西式涂抹),转录特征 (RNA测序,GSEA) 和蛋白质相互作用 (共免疫沉,质谱).
- 在癌模型中评估了体内疗效,并测量了代谢活性 (海马试验).
主要成果:
- 与4-1BB-CAR T细胞相比,HVEM-CAR T细胞在体外表现出更好的细胞毒性,细胞因子释放和增殖.
- HVEM-CAR T细胞表现出增强的TNF信号传递,增加AKT和ERK1/2酸化,以及升高的代谢活性.
- HVEM通过其AVEE动机招募了TRAF1,TRAF2,TRAF3和TRAF5,这对其增强功能至关重要;突变破坏了这一点,影响了有效性.
- 在体内研究证实了优异的瘤控制,延长存活时间,并增加了HVEM-CAR T细胞的内丰度.
结论:
- 通过通过其AVEE动机通过TRAF招募激活TNF信号传递,HVEM显著提高了CAR T细胞对固体瘤的疗效.
- 在固体瘤中,HVEM代表了一个有前途的协同刺激领域,用于推进CAR T细胞治疗,影响代谢重编程和持续的抗瘤活性.
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