%0 Journal Article %A H Karam %A P Bruneval %A J P Clozel %A B M Löffler %A J Bariéty %A M Clozel %T Role of endothelin in acute renal failure due to rhabdomyolysis in rats. %D 1995 %J Journal of Pharmacology and Experimental Therapeutics %P 481-486 %V 274 %N 1 %X Rhabdomyolysis and other causes of massive myoglobin release are often complicated by an acute ischemic renal failure. We tested the hypothesis that endothelin-1, the most potent renal vasoconstrictor known, plays a role in the renal toxicity of myoglobin. For this purpose, we induced rhabdomyolysis (8 ml/kg i.m. of a 50% glycerol solution) in rats pretreated or not pretreated with bosentan, a novel potent nonpeptide endothelin receptor antagonist. Glycerol decreased renal function dramatically, increased proteinuria and induced a massive tubular necrosis. This effect was associated with a 22% increase in plasma endothelin concentration. Bosentan prevented the decrease in creatinine clearance (1.12 +/- 0.07 ml/min vs. 0.83 +/- 0.05 ml/min, P < .01), the increase in proteinuria (19.9 mg/24 hr vs. 31.8 mg/24 hr, P < .001) and the tubular necrosis induced by glycerol (as assessed by histopathological evaluation), without affecting myoglobinuria. Involvement of endothelin was further suggested by the observation that myoglobin could markedly increase endothelin-1 release by rat mesangial cells in culture. We conclude that endothelin is, at least in part, responsible for the massive tubular necrosis observed in myoglobinuric nephropathy. %U https://jpet.aspetjournals.org/content/jpet/274/1/481.full.pdf