首页> 外文期刊>Endothelium: Journal of endothelial cell research >Gender-related differences in proliferative responses of vascular smooth muscle cells to endothelin-1.
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Gender-related differences in proliferative responses of vascular smooth muscle cells to endothelin-1.

机译:血管平滑肌细胞对内皮素-1增殖反应的性别相关差异。

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摘要

Endothelin-1 is an endothelium-derived factor which alters tone and proliferation of vascular smooth muscle and has been implicated in the development of atherosclerosis. Estrogen modulates production of and contractile responses to endothelin-1. Since atherosclerosis is less in estrogen-replete women compared to men, experiments were designed to determine whether or not there were gender-associated differences in proliferative responses to endothelin-1 and effect of estrogen status on those responses. Proliferation of smooth muscle cells derived from coronary arteries of sexually mature, gondally intact male and female and oophorectomized female pigs was determined by thymidine incorporation in the absence and presence of endothelin-1 with and without 17beta-estradiol. Endothelin-1 (10(-9) M to 10(-7) M) significantly inhibited proliferation only in coronary smooth muscle cells from intact female pigs. Addition of beta-estradiol inhibited proliferation of cells from intact females but there was not a synergistic effect with endothelin-1. Gender associated inhibition of smooth muscle proliferation by endothelin-1 may contribute, in part, to cardioprotection noted in estrogen-replete states.
机译:内皮素-1是一种内皮源性因子,可改变血管平滑肌的声调和增殖,并与动脉粥样硬化的发展有关。雌激素调节内皮素-1的产生和收缩反应。由于雌激素丰富的女性的动脉粥样硬化程度要比男性少,因此设计实验来确定对内皮素-1的增殖反应以及雌激素状态对这些反应的影响是否存在性别相关的差异。在有或没有17β-雌二醇的情况下,通过加入胸苷来测定在有和没有内皮素-1的情况下胸腺嘧啶脱氧核苷的含量,可以测定来自性成熟,刚体完整的雄性和雌性以及经卵巢切除的雌性猪冠状动脉的平滑肌细胞的增殖。内皮素-1(10(-9)M至10(-7)M)仅在完整雌性猪的冠状平滑肌细胞中显着抑制增殖。 β-雌二醇的添加抑制了完整雌性细胞的增殖,但与内皮素-1没有协同作用。性别相关的内皮素-1对平滑肌增殖的抑制作用可能部分有助于雌激素充足状态下的心脏保护作用。

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