首页> 外文期刊>Endothelium: Journal of endothelial cell research >Circulating endothelial cell number and viability are reduced by exposure to high altitude.
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Circulating endothelial cell number and viability are reduced by exposure to high altitude.

机译:暴露于高海拔会降低循环内皮细胞的数量和生存能力。

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摘要

High altitude and hypoxia are known to induce polycythemia, pulmonary hypertension, and vascular remodeling. The authors investigated a number of blood cell populations in 15 mountain trekkers before and after 12 days spent at >3000 m. Red blood cell and platelet count increased, whereas circulating hematopoietic stem cell (enumerated as CD34bright cells), circulating endothelial cell (CEC) and circulating endothelial progenitor (CEP) count significantly decreased. In particular, the authors observed a decrease in the count of viable CECs, and a decrease in the circulating levels of RNA of the endothelial-specific gene VE-cadherin, whereas the fraction of apoptoticecrotic CECs was stable. These data suggest a unique pattern of modulation of surrogate markers of vascular remodeling induced by exposure to hypobaric hypoxia.
机译:已知高海拔和缺氧会导致红细胞增多症,肺动脉高压和血管重塑。作者调查了15个山间跋涉者在> 3000 m上停留12天之前和之后的大量血细胞数量。红细胞和血小板计数增加,而循环造血干细胞(称为CD34亮细胞),循环内皮细胞(CEC)和循环内皮祖细胞(CEP)计数显着降低。特别是,作者观察到了可行的CEC数量减少了,内皮特异性基因VE-钙黏着蛋白的RNA循环水平也下降了,而凋亡/坏死CEC的比例却是稳定的。这些数据表明暴露于低压缺氧引起的血管重构替代标志物的独特调节模式。

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