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瘤相关的CD8+T细胞耐受性是由红色素原生细胞诱导的
Xue Fan1,2,3, Han Peng1,2, Xuesong Wang1,2
1Department of Oncology and Southwest Cancer Centre, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
Frontiers in immunology
|May 27, 2024
概括
通过改变T细胞受体,CD45+红色素原生细胞诱导瘤中CD8+T细胞的耐受性. 尿酸治疗逆转了这种免疫抑制,增强了抗瘤免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞生物学 细胞生物学
背景情况:
- CD8+ T 细胞耐受性是瘤免疫逃避的一个关键机制.
- CD45+红色素原生细胞 (CD45+EPCs) 已涉及抑制抗瘤免疫力.
- CD45+EPCs诱导CD8+T细胞耐受性的确切机制尚未完全理解.
研究的目的:
- 研究CD45+EPCs诱导CD8+T细胞耐受性的机制.
- 探索反应性氧物种 (ROS) 在CD45+EPC介导免疫抑制中的作用.
- 评估瘤免疫治疗中准这种途径的治疗潜力.
主要方法:
- 进行了体外共同培养和体外收养转移实验.
- 用RNA测序分析来确定涉及的分子途径.
- 使用阻断实验和尿酸治疗来评估ROS和潜在干预措施的作用.
主要成果:
- CD45+EPCs处理抗原,呈现表位,并诱导抗原特异性的CD8+T细胞 anergy.
- CD45+EPCs产生ROS和过氧酸盐,导致TCR/CD8复合体中的氨酸化,损害T细胞功能.
- 尿酸的使用逆转了CD45+EPCs的免疫抑制作用,在收养转移模型中增强了抗瘤疗效.
结论:
- CD45+EPCs通过ROS介导的机制在携带瘤的小鼠中积极诱导CD8+T细胞耐受性.
- 准ROS途径或使用尿酸等药物有望改善瘤免疫治疗结果.
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