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细胞外基质定中性粒细胞在小鼠中驱动肺纤维化
Liliang Yang1,2,3, Piaopiao Sun1,3, Jing Wang1,3,4
1Jiangsu Provincial Key Laboratory of Critical Care Medicine, Zhongda Hospital, Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China.
Nature communications
|November 26, 2025
概括
研究人员发现,在肺纤维化中逆向迁移 (rTEM) 的中性粒细胞被ICAM1. 巨酶CTSC分裂ICAM1,激活纤维细胞并恶化肺纤维化.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部医学 肺部医学
- 细胞外矩阵生物学 细胞外矩阵生物学
背景情况:
- 肺纤维化 (PF) 是一种进展性肺病,涉及免疫失调和过度细胞外基质 (ECM) 重塑.
- 中性粒细胞以急性炎症而闻名,在纤维性疾病中扮演着新兴的角色.
- 化,一种PF类型,为研究这些机制提供了一个模型.
研究的目的:
- 研究中性粒细胞在肺纤维化中的作用,特别关注它们在纤维化微环境中的迁移和相互作用.
- 为了确定分子机制连接中性粒细胞,ECM和纤维细胞激活在化.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 和空间转录组学 (ST) 用于分析来自病小鼠模型的肺组织.
- 细胞外矩阵 (ECM) 蛋白质组学确定了关键蛋白质相互作用.
- 在体内进行了中性粒细胞和巨细胞枯竭实验.
主要成果:
- 在纤维化肺部区域中发现了一种经历反向透尾细胞迁移 (rTEM) 的独特中性粒细胞子集.
- 这些rTEM中性粒细胞通过ICAM1与ECM的相互作用被保留.
- 巨衍生的甲素C (CTSC) 分裂了ICAM1,产生可溶性ICAM1 (sICAM1),激活了纤维细胞,加剧了纤维化.
- 中性粒细胞或巨细胞的减少减少了ICAM1和CTSC,缓解了纤维化.
结论:
- 这项研究确立了ECM,rTEM中性粒细胞和肺纤维化进展之间的直接联系.
- ICAM1和CTSC被确定为这个过程中的关键调解者,以及纤维化肺部疾病的潜在治疗点.
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