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Abstract

Studies on the pharmacokinetics and metabolism of 4-chlorodiphenyl ether in rats.

Y C Chui, R F Addison and F C Law
Drug Metabolism and Disposition January 1987, 15 (1) 44-50;
Y C Chui
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R F Addison
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F C Law
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Abstract

The metabolic disposition of 14C-labeled 4-chlorodiphenyl ether ([14C]4-CDE) was examined in rats following iv administration of a single dose (850 nmol/kg). [14C]4-CDE decayed rapidly from the blood since no unchanged [14C]4-CDE was detected in the blood beyond 2 hr after [14C]4-CDE administration. The dispositional kinetics of [14C]4-CDE in rats were best described by a two-compartment open pharmacokinetic model. Total radioactivity was excreted slowly from rats; about 41% and 33% of the administered dose were excreted into the urine and feces, respectively, within 1 week after chemical administration. About 5% of the total radioactivity administered to rats was excreted into the bile in 1 hr. The bulk of the radioactivity in the excreta was due to the presence of [14C]4-CDE metabolites. 14C-labeled 4'-hydroxy-4-CDE was the major metabolite and accounted for at least 90% of the radioactivity in the urine. The metabolic conversion of [14C]4-CDE to 14C-labeled 4'-hydroxy-4-CDE was corroborated by in vitro studies with liver microsomes of rats. In addition, [14C]4-CDE was converted by liver microsomes to reactive metabolites which bound irreversibly to microsomal protein. An arene oxide is suggested as the intermediate metabolite in the biotransformation of [14C]4-CDE by rats.

 

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Drug Metabolism and Disposition
Vol. 15, Issue 1
1 Jan 1987
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Abstract

Studies on the pharmacokinetics and metabolism of 4-chlorodiphenyl ether in rats.

Y C Chui, R F Addison and F C Law
Drug Metabolism and Disposition January 1, 1987, 15 (1) 44-50;

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Abstract

Studies on the pharmacokinetics and metabolism of 4-chlorodiphenyl ether in rats.

Y C Chui, R F Addison and F C Law
Drug Metabolism and Disposition January 1, 1987, 15 (1) 44-50;
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