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  • Title: Changes in hepatic cytosolic glutathione S-transferase enzymes induced by clotrimazole treatment in rats.
    Author: González P, Tuñón MJ, Manrique V, Garcia-Pardo LA, González J.
    Journal: Clin Exp Pharmacol Physiol; 1989 Nov; 16(11):867-71. PubMed ID: 2612064.
    Abstract:
    1. The influence of the antifungal agent clotrimazole on cytosolic glutathione S-transferase activities was studied in male Wistar rats. 2. Animals received clotrimazole by gastric lavage for 3 days (75 mg/kg per day). Hepatic glutathione S-transferase activity was determined with five different substrates: 1-chloro-2,4-dinitrobenzene (CDNB), 1,2-dichloro-4-nitrobenzene (DCNB), p-nitro-benzyl chloride (PNBC), ethacrynic acid (EA) and trans-4-phenyl-3-buten-2-one (TPBO). 3. The largest increases in glutathione S-transferase activity were found with CDNB, DCNB and PNBC (+61%, +50% and +50%, respectively, when expressed per mg of cytosolic protein). Enzyme activity toward EA was induced to a lower extent (+33%). Changes in the formation of the conjugate of TPBO were relatively small (+22%). 4. These data indicate a differential induction of glutathione S-transferase isoenzymes and suggest that clotrimazole is a phenobarbital-type inducer of enzyme activity.
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