In vivo mesna and amifostine do not prevent chloroacetaldehyde nephrotoxicity in vitro.

Pediatric Nephrology : Journal of the International Pediatric Nephrology Association
Zeinab YaseenLaurence Dubourg

Abstract

Chloroacetaldehyde (CAA) is the putative metabolite responsible for ifosfamide-induced nephrotoxicity. Whereas evidence suggests that sodium 2-mercaptoethanesulfonate (mesna) and amifostine protect renal cells against CAA toxicity in vitro, their efficacy in clinical studies is controversial. To better understand the discrepancy between in vivo and in vitro results, we combined the in vivo intraperitoneal administration of either saline or mesna (100 mg/kg) or amifostine (200 mg/kg) in rats and the in vitro study of CAA toxicity to both proximal tubules and precision-cut renal cortical slices. The measured renal cortical concentrations of mesna and amifostine were 0.6+/-0.1 micromol/g and 1.2+/-0.2 micromol/g, respectively; these drugs did not cause renal toxicity. Despite this, none of the adverse effects of 0.5 mM CAA was prevented by the previous in vivo administration of mesna or amifostine. Toxicity of 0.5 mM CAA to rat proximal tubules was shown by the fall of cellular adenosine triphosphate (ATP), total glutathione and coenzyme A + acetyl-coenzyme A levels and by the altered metabolic viability of renal cells. Long-term exposure of cortical slices to CAA concentrations > or =30 microM caused severe cell toxicity (i.e. de...Continue Reading

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May 8, 2010·Expert Opinion on Drug Metabolism & Toxicology·Bérénice GiraudAngelo Paci
Apr 20, 2010·Drug Safety : an International Journal of Medical Toxicology and Drug Experience·George LiamisMoses Elisaf
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Sep 9, 2020·Clinical Kidney Journal·Ben Sprangers, Sebastian Lapman
Jul 20, 2017·Medicina·Łukasz DobrekPiotr Thor

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