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- W2108598445 abstract "The aim of this study was the evaluation of the hepatic damages following a subchronic exposure to malathion, an organophosphorus (OP) insecticide. Malathion was administered intragastrically in 1 ml corn oil containing 100 mg/kg Body Weight daily for 32 days. Malondialdehyde (MDA) concentration superoxide dismutase (SOD) and catalase (CAT) activities were analysed using a non-denaturing electrophoresis. The serum activities of Pseudocholinesterase (PchE), aspartate aminotransferase (ASAT) and alanine aminotransferase (ALAT) were determined. Malathion exposure leads to a significant decrease in AchE activity, an increase in hepatic MDA, and in serum ASAT and ALAT activities. A positive correlation between serum transaminases levels and hepatic MDA was demonstrated. These results indicate that malathion exposure induced lipid peroxidation LPO, a process of degradation of membrane lipids, involving the deterioration of the cellular integrity. We have recorded a slight increase in antioxidant enzymes activities. This leads us to suggest an insufficient elimination of free radicals, causing cytotoxic effects. To cite this article: R. Rezg et al., C. R. Biologies 331 (2008). Cette étude s'intéresse à l'évaluation des dommages hépatiques induits chez le rat à la suite d'une exposition subchronique à un insecticide organophosphoré, le malathion. Le malathion, solubilisé dans 1 ml d'huile de maïs à raison de 100 mg/kg de poids corporel/jour, est administré par gavage durant 32 jours. À la fin de l'expérience, le foie a été isolé pour la détermination du taux du malondialdéhyde (MDA) et la révélation native par électrophorèse en gel de polyacrylamide (native PAGE) des activités de la superoxide dismutase (SOD) et de la catalase (CAT). Les activités plasmatiques de la pseudocholinesterase (PchE), l'aspartate-amino-transférase (ASAT) et l'alanine-amino-transférase (ALAT) ont été également déterminées. Notre étude montre que l'exposition subchronique au malathion a induit chez le rat une diminution significative de l'activité de la PchE et une élévation hautement significative du taux du MDA hépatique, couplée à une augmentation significative des activités sériques des transaminases indicatrices de cytolyse. De plus, une corrélation positive et hautement significative a été démontrée entre l'élévation du taux de MDA et l'augmentation concomitante des activités sériques des transaminases. Ceci indique probablement que l'exposition subchronique au malathion entraîne la dégradation des lipides membranaires et donc l'altération de l'intégrité des hépatocytes, provoquant la libération de ces enzymes dans la circulation. Par ailleurs, une faible augmentation des activités des enzymes antioxidantes a été enregistrée, ce qui nous laisse suggérer une élimination insuffisante des radicaux libres, causant des effets cytotoxiques. Pour citer cet article : R. Rezg et al., C. R. Biologies 331 (2008)." @default.
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- W2108598445 date "2008-09-01" @default.
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- W2108598445 title "Biochemical evaluation of hepatic damage in subchronic exposure to malathion in rats: Effect on superoxide dismutase and catalase activities using native PAGE" @default.
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- W2108598445 doi "https://doi.org/10.1016/j.crvi.2008.06.004" @default.
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