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- W2275451044 abstract "The early nephrotoxic effect of the antitumor drug adriamycin (ADR) is suggested to be related to the generation of oxygen free radicals. Therefore the O2 -dependence and the influence of free radical scavengers were studied in the model of the isolated perfused single glomerulus of Myxine glutinosa and by histochemi-cal demonstration of the glomerular ATP-ase. In Myxine, the glomerular ATP-ase activity was decreased after injection of ADR (5 mg/kg, i.v.).Both ADR-treated Myxine and controls were exposed for 48 h to an artificial atmosphere of 20% O2/80% N2 or 80% O2/20% N2, respectively. After 10 days a significant decrease of the hydraulic conductivity (k) was measured in the experimental group exposed to 80% O2 (k-values expressed as nl/s.mmHg.mm2: controls (7): 0.059 ± 0.017; ADR (7): 0.033 ± 0.026). The reduction of k following the administration of ADR (20 mg/kg) could be prevented by the sulphydryl donor N-acetylcysteine (NAC). The sieving coefficient for albumin (μ) was significantly increased in ADR-treated animals, showing no O2-dependence (μ × 10−2: controls (7) 1.3 ± 0.2; ADR 20% O2 (8): 8.1 ± 9.6; ADR 80% O2 (7): 6.9 ± 6.7). ω was not affected by NAC.The lipid peroxide levels in liver, kidney and heart of Myxine increased after the administration of ADR, peaking by day 2 to 5. The circulation disorders of ADR-treated Myxine were not due to an accumulation of the drug in the heart, but rather to a lack of the intracellular antioxidant glutathione.It is concluded that the early nephrotoxic effect of ADR, as reflected by a decreased glomerular ATP-ase activity, is mediated by free radical formation. Oxidative stress on membrane compounds seems to reduce the water permeability of the glomerular barrier, while the ADR-induced sieving defect may be due to oxygen independent pathological mechanisms." @default.
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- W2275451044 date "1989-01-01" @default.
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- W2275451044 title "Adriamycin Affects Glomerular Renal Function: Evidence for the Involvement of Oxygen Radicals" @default.
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- W2275451044 doi "https://doi.org/10.3109/10715768909087942" @default.
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