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- W2334993432 abstract "The endothelin (ET) system may play an important role in the pathogenesis of acute renal failure (ARF). We hypothesize that the course of ARF in an ischemia-reperfusion model will be markedly attenuated by the orally active ETA-receptor antagonist LU 135252 (LU) because of an improvement of renal perfusion. ARF was induced in rats by clamping both renal arteries for 60 min. The study was divided into two parts. In part 1, Rats received LU orally (100 mg/kg/day) starting 1 h after induction of ARF for 14 days. Crs, Clcr and FEna were measured on days 1, 6, 9, and 14 after ARF. Crs was lower in the treatment group on days 1 [1.3 ± 0.31 mg/dl (n = 9) vs. 2.7 ± 0.46 mg/dl (n = 10); p < 0.05] and 6 [0.5 ± 0.1 mg/dl (n = 9) vs. 1.0 ± 0.2 mg/dl (n = 9); p < 0.05], and Clcr was higher on day 1 [0.9 ± 0.17 ml/min (n = 9) vs. 0.2 ± 0.1 ml/min (n = 8); p < 0.05] and 6 [1.8 ± 0.29 ml/min (n = 9) vs. 1.0 ± 0.21 ml/min (n = 9); p < 0.05] compared with vehicle. Additionally, FEna was lower in treated rats on day 1 [1 ± 0.4% (n = 9) vs. 8 ± 3% (n = 8); p < 0.05] compared with vehicle. In part 2, ARF was induced as described. Treated animals received 10 mg/kg LU on days 0, 1, 3, 6, 9, and 14 after ARF as an i.v. bolus injection. RBF, cortex blood flow (CBF), and medulla blood flow (MBF) were measured after application of LU on the same days: LU induced an increase in RBF (day 1: 14 ± 5.3%, n = 6, p = 0.04; day 3: 15 ± 2.8%, n = 8; p = 0.0008; day 6: 21 ± 5.8%, n = 6, p = 0.0.02; day 9: 13 ± 4%, n = 6; p = 0.03) and CBF (day 1: 8 ± 2.2%, n = 7, p = 0.03; day 3: 7 ± 2.5%, n = 7; p = 0.05; day 6: 18 ± 4.8%, n = 6, p = 0.04; day 9: 10 ± 2.5%, n = 6; p = 0.008) up to the first 9 days. MBF did increase on days 1 (9 ± 3.1%, n = 6; p = 0.04) and 6 (13 ± 3.6%, n = 6; p = 0.03). Our data confirm the hypothesis that ET plays a major role in the genesis of ARF associated with ischemia-reperfusion." @default.
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- W2334993432 date "1998-07-01" @default.
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- W2334993432 title "Improvement of Postischemic Acute Renal Failure with the Novel Orally Active Endothelin-A Receptor Antagonist LU 135252 in the Rat" @default.
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- W2334993432 doi "https://doi.org/10.1097/00005344-199807000-00013" @default.
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