title: Curcumin pretreatment prevents potassium dichromate-induced hepatotoxicity, oxidative stress, decreased respiratory complex I activity, and membrane permeability transition pore opening.
abstract: Curcumin is a polyphenol derived from turmeric with recognized antioxidant properties. Hexavalent chromium is an environmental toxic and carcinogen compound that induces oxidative stress. The objective of this study was to evaluate the potential protective effect of curcumin on the hepatic damage generated by potassium dichromate (K2Cr2O7) in rats. Animals were pretreated daily by 9-10 days with curcumin (400 mg/kg b.w.) before the injection of a single intraperitoneal of K2Cr2O7 (15 mg/kg b.w.). Groups of animals were sacrificed 24 and 48 h later. K2Cr2O7-induced damage to the liver was evident by histological alterations and increase in the liver weight and in the activity of alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, and alkaline phosphatase in plasma. In addition, K2Cr2O7 induced oxidative damage in liver and isolated mitochondria, which was evident by the increase in the content of malondialdehyde and protein carbonyl and decrease in the glutathione content and in the activity of several antioxidant enzymes. Moreover, K2Cr2O7 induced decrease in mitochondrial oxygen consumption, in the activity of respiratory complex I, and permeability transition pore opening. All the above-mentioned alterations were prevented by curcumin pretreatment. The beneficial effects of curcumin against K2Cr2O7-induced liver oxidative damage were associated with prevention of mitochondrial dysfunction.
authors: Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), University City, 04510 Mexico City, DF, Mexico.
authors: Wylly Ramsés
authors: WR
authors: García-Niño
authors: Edilia
authors: E
authors: Tapia
authors: Cecilia
authors: C
authors: Zazueta
authors: Zyanya Lucía
authors: ZL
authors: Zatarain-Barrón
authors: Rogelio
authors: R
authors: Hernández-Pando
authors: Claudia Cecilia
authors: CC
authors: Vega-García
authors: José
authors: J
authors: Pedraza-Chaverrí
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