Benznidazole and nifurtimox nitroreductase activity in liver microsomes from male rats preinduced with phenobarbital or 3-methylcholanthrene
- PMID: 3841223
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Benznidazole and nifurtimox nitroreductase activity in liver microsomes from male rats preinduced with phenobarbital or 3-methylcholanthrene
Res Commun Chem Pathol Pharmacol.
1985 Dec.
Abstract
Liver microsomes from Sprague-Dawley male rats are able to biotransform Benznidazole (Bz) or Nifurtimox (NFX) by nitroreduction. Pretreatment of the rats during three days with phenobarbital (80 mg/kg/day, ip) but not with 3-methylcholanthrene (35 mg/kg/day ip) increased both Bz and NFX nitroreductase activity. Results suggest that cytochrome P-450 but not cytochrome P-448 is involved in the nitroreduction of these two chemotherapeutic agents against Chagas' disease. Possible pharmacological and toxicological implications of these observations are discussed.
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