纤维细胞衍生的细胞外囊泡含有SFRP1并介导肺纤维化
Olivier Burgy1,2, Christoph H Mayr3, Déborah Schenesse1,2,4
1INSERM U1231 Center for Translational and Molecular Medicine (CTM), Faculty of Health Sciences, Université de Bourgogne, Dijon, France.
JCI insight
|September 24, 2024
概括
异形性肺纤维化 (IPF) 肺中的细胞外囊泡 (EVs) 携带有纤维的载荷. 含有SFRP1的纤维细胞衍生的EVs促进肺纤维化,并代表了IPF的潜在治疗标.
科学领域:
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
- 生物化学 生化学
背景情况:
- 异形性肺纤维化 (IPF) 是一种致命的肺病,其机制尚不清楚.
- 细胞外囊泡 (EVs) 在IPF肺部积累,但它们的作用和载荷尚不清楚.
研究的目的:
- 为了研究肺纤维化期间EVs的蛋白质载荷.
- 为了确定EVs对纤维化进展的贡献.
- 确定特定的EV相关分子作为IPF的潜在治疗点.
主要方法:
- 来自白素诱导的肺纤维化小鼠模型的支气管洗液EV (BALF-EV) 的无标签蛋白质组学.
- 多原子分析以确定BALF-EVs的细胞来源和载荷.
- 使用精密切割的肺切片和体内模型进行功能性测试,以评估EV纤维化潜力.
- 分析SFRP1 (分泌的状相关蛋白1) 缺陷及其对WNT/β-catenin信号传递的影响.
主要成果:
- EVs在纤维化肺部积累,与肺功能下降相关,并启动纤维化.
- 蛋白质组分析确定了107种蛋白质,富含纤维化的BALF-EVs.
- 纤维细胞被确定为EV货物的主要来源,特别是SFRP1.
- 在EV中SFRP1缺乏抑制了它们的益纤维素活性.
- 在SFRP1促进过渡细胞标记物和WNT/β-catenin信号传递在2型膜细胞中.
- 在IPF肺部和来自患者的纤维细胞的EV中发现了SFRP1.
结论:
- 纤维化肺中的改变的EV蛋白载荷促进了肺纤维化.
- 在EV中由纤维细胞衍生的SFRP1是肺纤维化的一个关键媒介.
- 膀SFRP1代表了IPF的一个有前途的治疗点.
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