PD-1 保持 CD8 T 细胞对皮肤新抗原的耐受性
Martina Damo1, Noah I Hornick1,2, Aarthi Venkat3
1Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.
Nature
|June 21, 2023
概括
编程细胞死亡蛋白1 (PD-1) 通过调节自我反应的CD8T细胞来维持皮肤耐受性. 这可以防止组织损伤和与免疫相关的不良事件,支持外围T细胞耐受性的新模型.
科学领域:
- 免疫学
- 细胞生物学
- 皮肤病学
背景情况:
- 健康的个体具有自我反应的T细胞,需要外周耐受性机制.
- 据信像PD-1这样的检查点受体通过自反应T细胞的删除或无能化诱导耐受性.
- 用检查点抑制剂治疗的癌症患者的免疫相关不良事件挑战了现有的耐受性模型.
研究的目的:
- 在皮肤特异性抗原模型中研究PD-1在维持外周耐受性的作用.
- 阐明PD-1在组织中调节效应体CD8T细胞的机制.
- 探索这些发现与免疫相关的不良事件的相关性.
主要方法:
- 开发具有皮肤特异性T细胞抗原表达的小鼠模型.
- 在皮肤中分析CD8T细胞透,分化和功能.
- 来自免疫相关不良事件患者的皮肤活检的转录组分析.
主要成果:
- 防止组织透的抗原特异性CD8T细胞变得完全致病.
- PD-1 限制了 CD8 T 细胞对抗原表达细胞的分泌和进入.
- 缺少PD-1导致CD8T细胞介导的表皮细胞和局部病理.
- 在患有皮肤液状免疫相关不良事件的患者中发现了细胞扩张的CD8 T细胞.
结论:
- 通过调节效应细胞CD8T细胞,PD-1对维持皮肤耐受性至关重要.
- 在不引起免疫病态的情况下,PD-1 能够使效应T细胞和抗原表达细胞共存.
- 这些发现支持了涉及PD-1组织特异性调节功能的外围T细胞耐受性的修订模型.
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