肺纤维化与内皮细胞活化增加和功能障碍的血管屏障完整性有关
Elisabeth Fließer1, Katharina Jandl1,2, Thomas Lins1
1Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria.
概括
肺纤维化涉及异常的肺内皮细胞 (ECs),其屏障减弱,免疫细胞粘附度增加. 恢复EC功能可能为纤维化肺部疾病提供新的治疗策略.
科学领域:
- 肺部医学 肺部医学
- 血管生物学 血管生物学
- 细胞生物学 细胞生物学
背景情况:
- 肺纤维化 (PF) 是一种具有渐进性痕的致命肺病.
- 肺内皮在PF病原发生中的作用尚不清楚.
研究的目的:
- 为了研究肺内皮细胞 (ECs) 的特征和功能,在患有PF的患者中.
- 与健康捐赠者相比,分析PF患者的肺血管结构.
主要方法:
- 传输电子显微镜的使用
- 免疫组织化学 免疫组织化学
- 单细胞RNA测序的一个细胞.
- 血管屏障抵抗和内皮细胞-免疫细胞粘附的体外研究.
- 用于血标记物的ELISA.
主要成果:
- 纤维化肺部显示出胀的ECs与失调的CD31,von Willebrand Factor (vWF) 和VE-Cadherin染色.
- PF ECs表现出完整性标记物 (CD31,VE-Cadherin,Thrombomodulin,VEGFR-2) 和激活标记物vWF的表达增加.
- 纤维性EC对炎症性细胞因子 (TNF-α,IFN-γ) 更敏感,显示免疫细胞粘附度增加和屏障强度降低.
- 血vWF和IL-8在PF患者中升高,而VE-Cadherin,Thrombomodulin和VEGFR-2则下降.
- 在活检组织中出现不齐的VE-Cadherin染色,以及与疾病进展相关的血水平降低.
结论:
- 肺内皮细胞在PF中高度异常,表现为过度活化和障碍功能受损.
- 在PF中,肺血管系统的特征是免疫细胞粘附度增加.
- 恢复内皮细胞平衡和功能为纤维化肺部疾病提供了潜在的治疗途径.
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