在T细胞中通过TRIM25剥离破坏VISTA,增强了癌症免疫治疗的潜力
Yishuang Sun1,2,3, Zijian Zhang4,5, Haiou Li6
1Department of Hepatobiliary and Pancreatic Surgery, State Key Laboratory of Metabolism and Regulation in Complex Organisms, Medical Research Institute, Frontier Science Center for Immunology and Metabolism, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China.
Cell research
|November 12, 2025
概括
研究人员发现,TRIM25稳定了VISTA,这是癌症免疫治疗的关键目标. 破坏这种相互作用可以增强抗瘤免疫力,改善对PD-1/PD-L1阻塞和CAR T细胞治疗的反应.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 目前的免疫疗法有效性有限,需要新的点和组合策略.
- V-域Ig抑制T细胞激活 (VISTA) 是一个有前途的免疫检查点目标,但其调节尚不清楚.
- 了解VISTA的调控机制对于改善癌症免疫治疗至关重要.
研究的目的:
- 确定VISTA的监管机构并阐明其作用机制.
- 探索针对VISTA调控途径以增强抗瘤免疫力的潜力.
- 研究TRIM25在VISTA稳定中的作用及其对免疫治疗的影响.
主要方法:
- 通过CRISPR淘汰查和蛋白质组分析来识别VISTA的调节者.
- 在VISTA上绘制ERK介导酸化位点的地图.
- 开发用于治疗干预的VISTA衍生的类.
- 单细胞RNA测序用于分析Trim25淘汰模式中的免疫细胞透.
主要成果:
- 含有25 (TRIM25) 的三方基因因被确定为VISTA的积极调节者,通过抑制其降解.
- 以ERK为媒介的VISTA在Thr284的酸化增强了其与TRIM25的相互作用,稳定了VISTA.
- 一种VISTA衍生的类干扰了TRIM25-VISTA的相互作用,减少了VISTA的表达,增强了抗PD-1/PD-L1阻塞的有效性.
- 在抗PD-L1和CAR T细胞治疗模型中,Trim25的T细胞特异性淘汰增加了瘤透的细胞毒性CD8+T细胞,并改善了抗瘤活性.
结论:
- 通过依赖酸化的相互作用,TRIM25稳定了VISTA,这代表了一个新的调节机制.
- 针对TRIM25-VISTA相互作用提供了一个潜在的策略,以提高癌症免疫疗法的疗效.
- 在T细胞中调节TRIM25可以增强抗瘤反应,这表明VISTA向策略的治疗潜力.
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