Abstract

Infusion of endothelin-1 (ET-1) into conscious, chronically instrumented dogs (1, 3 and 10 ng/kg/min i.v.) resulted in decreases in renal plasma flow, urine flow and sodium excretion. Intravenous ET-1 infusion in the presence of enrasentan at 30 microg/kg/min, resulted in an increase in renal plasma flow and sodium excretion; however, at a higher infusion rate (100 microg/kg/min) no renal vasodilation or natriuresis was observed. These data indicate that enrasentan can unmask ET(B)-receptor-induced renal vasodilation and natriuresis.

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