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- W2146936132 abstract "It has been increasingly appreciated that aldosterone elicits acute vascular effects through nongenomic signaling pathways. Our previous studies demonstrated that aldosterone attenuated phenylephrine-mediated constriction in intact vessels [via phosphatidylinositol 3-kinase-dependent nitric oxide synthase activation] but enhanced vasoconstrictor responses in endothelium-denuded arteries. To determine the mechanism of this vasoconstrictor response, we assessed the effect of aldosterone on myosin light-chain phosphorylation and contraction in clonal adult human vascular smooth muscle cells. Acute aldosterone exposure mediated dose-dependent myosin light-chain phosphorylation, inhibited by spironolactone and phosphatidylinositol 3-kinase inhibition. These rapid effects of aldosterone were mimicked by estradiol and hydrocortisone and were also inhibitable by both spironolactone and eplerenone. In parallel to its effects on myosin light-chain phosphorylation, aldosterone mediated dose-dependent contraction responses that were inhibited by spironolactone. Comparable contractile responses were seen with both 17beta-estradiol and hydrocortisone. In total, these data are consistent with a mechanism of acute aldosterone-mediated contraction common to both glucocorticoids and estrogen. Steroid-mediated vasoconstriction may represent an important pathobiological mechanism of vascular disease, especially in the setting of preexisting endothelial dysfunction." @default.
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- W2146936132 date "2007-02-01" @default.
- W2146936132 modified "2023-10-18" @default.
- W2146936132 title "Rapid effects of aldosterone on clonal human vascular smooth muscle cells" @default.
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- W2146936132 doi "https://doi.org/10.1152/ajpcell.00407.2006" @default.
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