PMID: 6413203Oct 1, 1983Paper

Maternal hepatic effects of 1,2,4,5-tetrachlorobenzene in the rat

Environmental Research
K T Kitchin, M T Ebron

Abstract

1,2,4,5-Tetrachlorobenzene (TCB) is an industrial intermediate used in the production of 2,4,5-trichlorophenoxyacetic acid. This herbicide contains trace quantities of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Because of possible maternal hepatic or reproductive effects of this uncharged, low-molecular weight, lipophilic chlorinated benzene 0, 30, 100, 300, and 1000 mg/kg/day of TCB was orally administered to rats on Days 9, 10, 11, 12, and 13 of gestation and the animals were sacrificed on Day 14 of pregnancy. No maternal deaths were recorded and body weight gain was significantly decreased only in the 1000 mg/kg/day group. Maternal liver weight, liver to body weight ratio, and hepatic microsomal protein content were unaffected by TCB treatment. Although Day 14 NADPH-cytochrome c reductase activity was not affected, the maternal hepatic microsomal cytochrome P-450 content was significantly increased by administration of 1000 mg/kg/day of TCB. Microsomal N-demethylation of aminopyrine was slightly increased from 2.4 to 3.4 and 3.5 nmole/mg protein/min at doses of 300 and 1000 mg/kg TCB. However, maternal hepatic microsomal ethoxyresorufin O-deethylase activity was greatly increased from 14 to 30, 40, 50, and 49 pmole/mg prote...Continue Reading

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Aug 1, 1983·Environmental Research·K T Kitchin, M T Ebron
Jun 1, 1980·Proceedings of the National Academy of Sciences of the United States of America·S M GallowayR A Pedersen

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Citations

Aug 1, 1983·Environmental Research·K T Kitchin, M T Ebron
Jan 1, 1989·Critical Reviews in Biotechnology·F S Sariaslani

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