Journal
CLINICAL SCIENCE
Volume 103, Issue -, Pages 176S-178SPublisher
PORTLAND PRESS
DOI: 10.1042/CS103S176S
Keywords
atherosclerosis; endothelial cells; endothelin-1; oxidative stress; vascular smooth muscle cells
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A dysregulated metabolism of oxygen-derived free radicals, nitric oxide and endothelin-1 (ET-1) in conditions such as hypercholesterolaemia or hypertension may promote the development of atherosclerosis. We therefore subjected cultured human umbilical vein endothelial cells and coronary artery smooth muscle cells to oxidative stress induced by xanthine oxidase or hydrogen peroxide and observed alterations in ET-I metabolism. Incubation with oxygen-derived free radicals increased preproET-1 promoter activity, ET-1 mRNA synthesis and big ET-1 concentrations in both cell types. This interaction of oxidative stress and ET-1 expression may be relevant in atherogenic conditions such as hypercholesterolaemia and hypertension since our data indicate that oxidative stress further aggravates the injurious effects attributed to ET-1.
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