alexa Effect of deferrioxamine and diethyldithiocarbamate on paracetamol-induced hepato- and nephrotoxicity. The role of lipid peroxidation.
Toxicology

Toxicology

Journal of Drug Metabolism & Toxicology

Author(s): Younes M, Sause C, Siegers CP, Lemoine R

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Abstract In mice subjected to glutathione depletion by pretreatment with phorone (diisopropylidene acetone, 200 mg/kg i.p. in 10 ml/kg olive oil) paracetamol (acetaminophen, 300 mg/kg p.o. in 10 ml/kg tylose 2 h later) led to a marked hepatotoxicity as evidenced by increased plasma activities of the liver-specific enzymes sorbitol dehydrogenase (SDH) and glutamate-pyruvate-transaminase (GPT) 3 and 24 h after treatment. Nephrotoxicity was also indicated at both timepoints by an increased creatinine concentration in plasma, while neither the urine volume nor its content in gamma-glutamyl transpeptitase over 20 h were affected. Hepato- and nephrotoxicity were also assessed histomorphologically. In vivo lipid peroxidation (LPO), as measured by ethane exhalation over 3 h, was clearly enhanced by paracetamol. Malondialdehyde content was increased and glutathione concentration diminished in the liver, but not in the kidney. Diethyldithiocarbamate (DTC, 200 mg/kg i.p.) or deferrioxamine (DFO, 500 mg/kg i.p.) both given 30 min before PA, inhibited in vivo LPO. However, only DTC was capable of antagonizing the hepato- and nephrotoxic effects of paracetamol, while DFO only delayed the onset of nephrotoxicity but left the hepatotoxicity unaffected. Both agents inhibited the rise in hepatic malondialdehyde-content, but only DTC prevented paracetamol-induced glutathione depletion. These results indicate that LPO is not mainly responsible for paracetamol toxicity towards liver or kidney.
This article was published in J Appl Toxicol and referenced in Journal of Drug Metabolism & Toxicology

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