Hepatic enzyme induction and acute endocrine effects of 2,2′,3,3′,4,6′-hexachlorobiphenyl and 2,2′,3,4′,5′,6-hexachlorobiphenyl in prepubertal female rats

被引:8
|
作者
Li M.-H. [1 ]
Hsu P.-C. [2 ]
Guo Y.L. [3 ]
机构
[1] Department of Geography, National Taiwan University, Taipei 106, Roosevelt Road
[2] Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Yuanchau, Kaohsiung
[3] Department of Environmental and Occupational Health, National Cheng Kung University Medical College, Tainan 70428
关键词
Thyroid Hormone; PCBs; Biphenyl; Thyroxine; Enzyme Induction;
D O I
10.1007/s002440010263
中图分类号
学科分类号
摘要
Polychlorinated biphenyls (PCBs) with the liable 2,3,6-substitution are important components of certain commercial mixtures and frequently detected in biota, but little is known about their enzyme induction abilities and possible endocrine-disrupting effects. CB 132 (2,2′,3,3′,4,6′-hexachlorophenyl) and CB 149 (2,2′3,4′,5′,6-hexachlorophenyl) were investigated in weanling female rats dosed intraperitoneally on days 21 and 22 and killed on day 24 of age. Uterotropic response, serum thyroid hormone, and hepatic enzyme induction were examined in prepubertal female rats treated with these two environmentally relevant 2,3,6-substituted chlorobiphenyl (CB) congeners from 8 mg/kg to 96 mg/kg. The readily metabolized CB 132 did not cause any significant increase in all endpoints measured in the present study. On the other hand, CB 149 was a weak PROD and BROD inducer and a modest depleter of serum thyroxine in prepubertal female rats. The finding of thyroid hormone disruption by CB 149 may lead to biologically significant neurobehavioral and neurochemical changes in developing animals via milk lactation.
引用
收藏
页码:381 / 385
页数:4
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