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  • Title: SB 234551, a novel endothelin--A receptor antagonist, unmasks endothelin-induced renal vasodilatation in the dog.
    Author: Brooks DP, DePalma PD, Pullen M, Elliott JD, Ohlstein EH, Nambi P.
    Journal: J Cardiovasc Pharmacol; 1998; 31 Suppl 1():S339-41. PubMed ID: 9595475.
    Abstract:
    Infusion of endothelin-1 (ET-1) into conscious, chronically instrumented dogs (10 ng/kg.min i.v.) resulted in a significant increase in mean arterial pressure and significant reductions in renal plasma flow, glomerular filtration rate, and sodium excretion. Intravenous infusion of SB 209670 (30 micrograms/kg.min, i.v.) abolished these responses, whereas infusion of SB 234551 (30 micrograms/kg.min, i.v.) resulted in significant increases in renal plasma flow and urinary sodium excretion. These data indicate that SB 234551 can unmask ETB receptor-induced renal vasodilatation and inhibition of sodium reabsorption.
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