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肺毛细血管内皮细胞的不同种群及其功能意义

Joel James¹, Aleksandr Dekan¹, Sedat Kacar¹

¹Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA.

Communications biology

|December 25, 2025

概括

研究人员使用单细胞转录学发现了五种新的肺毛细体内皮细胞类型. 这些新型细胞群,包括"根"细胞,对于肺血管修复和再生至关重要,特别是在缺氧条件下.

科学领域:

肺血管生物学肺血管生物学
内皮细胞异质性的内皮细胞异质性
肺部微循环肺部的微循环

背景情况:

肺毛细血管内皮细胞对于正常生理和疾病至关重要.
单细胞转录组学揭示了不同的气球细胞和一般毛细血管 (gCaps) 内皮细胞.
有证据表明,肺毛细血管比以前理解的更加异质.

研究的目的:

为了研究肺毛细血管内皮细胞的异质性.
为了识别新的 gCap 种群及其分子特征.
了解这些群体在肺血管平衡和疾病中的作用.

主要方法:

在丰富的肺内皮细胞上进行单细胞转录组学 (scRNAseq).
分子标记和基因表达的分析.
缺氧诱导模型和发育时间分析.

主要成果:

鉴定了五种具有明显分子特征的新奇 gCap 种群.
发现了两个主要的CGAP群体表达Scn7a和Clic4,形成动脉到静脉过渡.
具有特征的"根"细胞 (Flot1+) 负责内皮再生和修复,在缺氧时扩大.
鉴定了Lingo2表达的静脉毛囊内皮,用于Chap-to-vein过渡.
发现Fabp4高的 gCaps具有血管生成调节能力.
揭示了在肺成熟过程中从原始细胞 (FoxM1+) 转变为"根"细胞的发育转换.

结论:

肺微循环包括至少五个不同的CGAP种群.
"根"细胞在血管再生和对缺氧的反应中起着至关重要的作用.
这些发现增强了对毛细管表型及其在肺部疾病发病过程中的作用的理解.

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