Abstract
Concomitant with the depletion of glutathione content, phorone (250 mg/kg, ip.) produced a marked increase in heme oxygenase activity, biphasic effect on δ-aminolevulinic acid synthetase activity, and slight decreases in cytochrome P-450 content and aminopyrine demethylase activity in the liver of rats. The increase in heme oxygenase activity evoked by phorone was almost completely blocked by pretreatment of rats with actinomycin D and cycloheximide. Phorone was able to produce the changes in these parameters in a dose-dependent manner. Buthionine sulfoximine, a GSH depletor by inhibition of biosynthesis, failed to affect these hepatic parameters.
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