Antagonism of endothelin actions

摘要

The mechanism of hypertension following acute NO synthase blockade is via endothelin-mediated vasoconstriction. Thus, NO appears to inhibit endothelin activity by blocking its expression and not as a chronic direct acting vasodilator. Administration of an endothelin antagonist to a patient in a "normal' physiological state may result in specific regional vasodilation. This treatment finds utility in the treatment of erectile dysfunction.