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Revista del Instituto Nacional de Enfermedades Respiratorias
Print version ISSN 0187-7585
Abstract
BALTAZARES LIPP, Matilde et al. Endothelin system. Rev. Inst. Nal. Enf. Resp. Mex. [online]. 2005, vol.18, n.4, pp.308-320. ISSN 0187-7585.
The endothelins (ETS) family consists of three 21 aminoacid isoforms: endothelin-1 (ET-1), endothelin-2 (ET-2) and endothelin-3 (ET-3). ETS are very potent endogenous pressor agents, secreted by various cells and tissues in the human body. Of the three, endothelin-1 is the predominant isoform produced by the vascular endothelium. ET-1 induces vasoconstriction, is proinflammatory, profibrosis, and has mitogenic potential; it is also an important factor in the regulation of vascular tone and arterial vascular remodeling. These effects are mediated via two receptor types, ETA and ETB. ETA receptor is located mainly on vascular smooth muscle and is responsible for mediating vasoconstriction and proliferation. The ETB receptor is present predominantly on endothelial cells and mediates vasorelaxation for NO and prostacyclin release and also ET-1 clearance. The ET system is activated in essential hypertension, pulmonary hypertension, atherosclerosis, coronary restenosis, heart failure, idiopathic cardiomyopathy and renal failure
Keywords : Endothelins; endothelin receptor-A; endothelin receptor-B; endothelial cell; smooth muscle cell; endothelin-converting enzime; nitric oxide; mesenger RNA.