降低宽容性程序 死亡-连接体1-表达常规类型1状细胞 与慢性阻塞性肺病的快速下降有关
Kuan-Yuan Chen1,2,3,4, Wei-Lun Sun2,4,5, Sheng-Ming Wu2,3,4,5
1Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
Cells
|May 24, 2024
概括
在慢性阻塞性肺病 (COPD) 患者的树突细胞上减少编程死亡配体1 (PD-L1) 可能会导致自身免疫. 这种免疫失调与疾病进展和Th17驱动的炎症有关.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部病理学 肺部病理学
- 细胞生物学 细胞生物学
背景情况:
- 慢性阻塞性肺病 (COPD) 涉及自身免疫,由T助手1和17 (Th1和Th17) 反应驱动.
- 免疫耐受性的丧失,可能由被编程死亡 1 (PD-L1) 介导,可能有助于COPD的发病.
研究的目的:
- 研究PD-L1表达型树突细胞 (DCs) 和它们的亚型的耐受性功能.
- 为了将DC功能与T细胞免疫力和临床COPD表型相关联.
主要方法:
- 流细胞计被用来分析PD-L1表达在DCs及其亚型在周围血液单核细胞 (PBMCs) 从健康个体和COPD患者.
- 测量T细胞增殖和细胞因子的产生 (例如IL-17A,IFN-γ) 经过以弹性素等自身抗原进行刺激后.
- 与酶相关的免疫吸收试验 (ELISA) 量化了细胞因子水平.
主要成果:
- 慢性肺炎患者在PBMC中表现出PD-L1阳性常规1型树突细胞 (cDC1s) 的比例降低 (13.7 ± 13.7%,p = 0.03).
- 这种PD-L1+cDC1s的减少与COPD迅速下降 (p = 0.02) 和CD4+T细胞 (r = -0.33,p = 0.02) 相相关.
- 在健康的PBMC中,PD-L1阻断增强了CD4+T细胞的增殖和IL-17A的产生,这表明它在抑制Th17反应方面发挥了作用.
结论:
- 在COPD患者中循环PD-L1+cDC1s的减少表明抑制了耐受性功能.
- 这种抑制有助于对自我抗原和Th17歪曲炎症的敏感性,与疾病进展有关.
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