介酶体 stromal 细胞通过 PD-1/PD-L1 信号轴改善系统性硬化症-间歇性肺病
Yuxuan Chen1, Huimin Zhu1, Yue Zhang2
1Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China.
RMD open
|January 6, 2026
概括
编程死亡-1 (PD-1) -表达T细胞在系统性硬化症相关的间歇性肺病 (SSc-ILD) 中驱动纤维化. 介酶体 stromal 细胞 (MSC) 通过通过PD-L1抑制这些T细胞来治疗SSc-ILD,突出显示PD-1作为治疗标.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部病理学 肺部病理学
- 纤维化研究 纤维化研究
背景情况:
- 系统性硬化症相关的间歇性肺病 (SSc-ILD) 涉及渐进性肺纤维化.
- 编程死亡-1 (PD-1) -表达T细胞在SSc-ILD病原发生中的作用尚未完全理解.
- 介质细胞 stromal 细胞 (MSCs) 正在研究它们在纤维性疾病中的治疗潜力.
研究的目的:
- 研究PD-1表达T细胞在SSc-ILD病原发生中的作用.
- 评估MSCs在缓解SSc-ILD相关纤维化的治疗效果.
- 阐明MSCs发挥治疗作用的机制,重点关注PD-1/PD-L1通路.
主要方法:
- 流细胞计用于分析SSc患者和健康对照的T细胞上的PD-1表达.
- 建立了白素 (BLM) 诱导的SSc-ILD小鼠模型来评估MSC治疗.
- 给BLM治疗的小鼠施用MSC,并探索PD-L1倒置以了解MSC机制.
- 在体外共同培养实验中评估了MSC对CD4+PD-1+T细胞增殖和亡的影响.
主要成果:
- 与健康对照组和SSc非ILD患者相比,SSc-ILD患者的T细胞上PD-1表达显著更高.
- 在BLM诱导的小鼠肺部增加的CD4+PD-1+T细胞与纤维化严重程度相关,并直接刺激纤维细胞原蛋白的产生.
- 在小鼠模型中,MSC治疗减少了肺炎,纤维化和PD-1+ T细胞频率.
- MSCs的治疗效果依赖于PD-L1并通过MSC诱导的抑制进行介导.
结论:
- CD4+PD-1+ T细胞是SSc-ILD中纤维化的主要驱动因素.
- 通过PD-L1介导的机制,MSC通过抑制PD-1+ T细胞来改善SSc-ILD.
- PD-1 是SSc-ILD的一个有前途的治疗标,支持对MSC治疗的临床研究.
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