Comparative biochemistry and physiology. C, Comparative pharmacology and toxicology · 1992
Liver microsomal alkoxyphenoxazone O-dealkylases of white Leghorn chickens: response to mixed function oxidase inducers.
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Banton M I, Winston G W, Flory W
Аннотация
1. The cytochrome P-450 substrates, methoxy-, ethoxy-, pentoxy- and benzyloxyphenoxazone were investigated in liver microsomes of phenobarbital- and beta-napththoflavone-induced White Leghorn chickens and compared to the rat mammalian model. 2. Thirty-two-fold increases in benzyloxyphenoxazone O-dealkylase and 27-fold increases in ethoxyphenoxazone O-dealkylase activities were observed in beta-naphthoflavone-treated chickens compared to only an 18-fold increase in ethoxyphenoxazone O-dealkylase activity in beta-naphthoflavone-treated rats. 3. Decreases in pentoxy- and benzyloxyphenoxazone O-dealkylase activities were observed in phenobarbital-treated chickens in contrast to increases of 197-fold in pentoxy- and 98-fold in benzyloxyphenoxazone O-dealkylases in the phenobarbital-treated rats.