在慢性阻塞性肺病肺部中CD8+ T细胞的激活
Ana B Villaseñor-Altamirano1,2, Dhawal Jain3, Yunju Jeong1,2
1Division of Pulmonary and Critical Care Medicine.
American journal of respiratory and critical care medicine
|September 27, 2023
概括
轻度至中度慢性阻塞性肺病 (COPD) 在肺组织中显示CD8+TEMRA细胞增加. 这些细胞可能会驱动炎症,为预防严重的COPD提供潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部病理学 肺部病理学
- 基因组学就是基因组学.
背景情况:
- 在慢性阻塞性肺病 (COPD) 中,炎症至关重要,但在轻度中度疾病中,免疫细胞格局在单细胞水平上仍然不明朗.
- 鉴定免疫细胞的特征对于了解疾病进展和开发向疗法至关重要.
研究的目的:
- 使用单细胞分辨率,从轻度至中度的COPD患者的肺组织中定义免疫细胞格局.
- 确定特定的免疫细胞种群及其与早期COPD相关的分子特征.
主要方法:
- 单细胞转录基因,蛋白质基因和T细胞受体谱的分析是在轻度至中度的COPD,肺气血,末期COPD,对照组和供体组的肺组织上进行的.
- 验证是在一个独立的患者队列 (N=929) 中进行的,并与COPD的小鼠模型集成.
主要成果:
- 轻度中度COPD肺部表现出两个CD8+T细胞亚群的丰富性增加:细胞毒性KLRG1+TIGIT+CX3CR1+TEMRA细胞和DNAM-1+CCR5+T居住记忆 (TRM) 细胞.
- 这些CD8+ T细胞通过IFNG与骨髓类和膜类II细胞相互作用,并表现出超扩展的T细胞受体克隆型.
- 与对照或末期COPD肺相比,轻度至中度的COPD肺部中CD8+ KLRG1+ TEMRA细胞的增加.
结论:
- 在轻度至中度的COPD肺部中,CD8+TEMRA细胞显著增加,这表明在严重疾病之前的炎症过程中发挥了作用.
- 对这些CD8+TEMRA细胞的进一步调查可能会揭示预防COPD进展至严重COPD的治疗策略.
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