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Pathophysiological role of endothelin revealed by the first orally active endothelin receptor antagonist

Abstract

SINCE its discovery1, endothelin-1 has attracted considerable scientific interest because of its extremely potent and long-lasting vasoconstrictor effect and its binding to G-protein-coupled receptors2. Plasma concentrations of endothelin-1 are low3 and its release by endothelial cells is polarized towards the basolateral side4,5, suggesting that it is a paracrine factor and not a hormone. Consequently, the effect of injected endothelin-1 may not reflect the effect of endogenous endothelin-1. In contrast, blockade of the action of endogenous endothelin-1 using receptor antagonists should be a valuable means of investigating its physiological and pathological effects. We report here evidence for the pathophysiological role of endothelin-1 as brought by the first synthetic orally active non-peptide antagonist of endothelin receptors, Ro 46-2005.

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Clozel, M., Breu, V., Burri, K. et al. Pathophysiological role of endothelin revealed by the first orally active endothelin receptor antagonist. Nature 365, 759–761 (1993). https://doi.org/10.1038/365759a0

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