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慢性血栓栓塞性肺高血压中肺血管树沿的内皮特征:独特还是共同的方面?

Janne Verhaegen¹, Lynn Willems¹, Allard Wagenaar¹

¹Laboratory of Respiratory Diseases & Thoracic Surgery (BREATHE), Department of Chronic Diseases & Metabolism (CHROMETA) KU Leuven - University of Leuven Leuven Belgium.

Pulmonary circulation

|May 13, 2025

概括

这项研究调查了慢性血栓栓塞性肺高血压 (CTEPH),发现虽然肺动脉内皮细胞 (PAEC) 在不同类型的病变中表现出不同的血管源信号,但它们的体外功能保持不变,这表明在病变重中混合内皮细胞起源.

科学领域:

肺高血压研究肺高血压研究
血管生物学血管生物学
内皮细胞功能内皮细胞功能

背景情况:

慢性血栓栓塞性肺高血压 (CTEPH) 是肺栓塞的一个罕见的,严重的并发症,以阻塞性血管病变为特征.
CTEPH的潜在机制,特别是肺动脉内皮细胞 (PAEC) 表型和功能在疾病异质性中的作用,尚未完全理解.
缺陷的血管新生和改变的PAEC功能被假设为CTEPH进展和组织学差异的贡献.

研究的目的:

调查CTEPH中不同类型的肺动脉病变衍生的PAECs的血管生成能力和内皮屏障功能.
在CTEPH病变中探索血管内皮生长因子 (VEGF) -A/VEGF受体-2 (VEGFR2) 轴和原15A1 (COL15A1) 的表达.
确定PAEC表型和功能是否与CTEPH中观察到的组织学差异相关.

主要方法:

从CTEPH患者的肺内关节切除术 (PEA) 中获得的肺动脉病变的组织学分析.
在大型和 (子) 分段性肺动脉病变中评估VEGF-A,VEGFR2和COL15A1表达.
在体外评估从这些病变中分离出来的PAECs的血管性质和屏障功能.

主要成果:

(子) 分段性肺动脉病变显示出丰富的新血管化和丰富的VEGFR2表达,而大型病变具有更明显的VEGF-A表达.
从大型病变与 (子) 细分病变中分离的PAECs在体外血管生成能力或屏障完整性中没有发现显著差异.
发现表达COL15A1 (系统性标记物) 的内皮细胞,表明系统性和肺内皮细胞对损伤回的贡献.

结论:

尽管在CTEPH中病变类型之间存在不同 in situ 血管生成线索 (VEGF-A/VEGFR2轴),但PAECs的内在体外血管生成能力和屏障功能保持不变.
表达COL15A1的内皮细胞的存在表明,细胞的混合起源有助于CTEPH中的病变再通道化.
需要进一步的研究,以充分阐明驱动CTEPH病原和血管改造的复杂机制.

关键词:

血管新生的产生.屏障的功能是屏障的功能.慢性血栓栓塞性肺高血压慢性血栓塞性肺高血压内皮细胞是内皮细胞.血管改造血管改造血管改造

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