Genre
- Journal Article
Polychlorinated biphenyls (PCBs) are ubiquitous environmental contaminants that bioaccumulate in the food chain and thus pose a health risk to humans and other animals. In this study, PCB 118 was added to the diets of Sprague Dawley rats for 13 weeks in concentrations of 2, 20, 200, 2000 p.p.b. to the females and 10, 100, 1000 and 10 000 p.p.b, to the males. The chemical was dissolved in corn oil; animals that served as the control received corn oil in the diets devoid of PCB. Use of transmission electron microscopy and stereology revealed significant (P < 0.05) elevation in the mean volume fraction of smooth reticulum profiles (20 p.p.b.), peroxisomes (200, 2600 p.p.b.) and lipid droplets (2000 p.p.b.) in the females. Hepatocytes from the males exhibited a significant increase in the mean volume fraction of lipid droplets at 10 000 p.p.b. (P < 0.05). Interactions between large quantity of estrogen and the PCB probably would account for more profound alterations in the liver of female Sprague-Dawley rats than in the males. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
Univ Prince Edward Isl, Atlantic Vet Coll, Charlottetown, PE C1A 4P3, Canada. Dept Hlth & Welf, Hlth Protect Branch, Ctr Environm Hlth, Ottawa, ON K1A 0L2, Canada.; Singh, A, Univ Prince Edward Isl, Atlantic Vet Coll, Charlottetown, PE C1A 4P3, Canada.
CLARE; CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND
ELSEVIER SCI IRELAND LTD
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Source type: Electronic(1)
Language
- English
Subjects
- liver
- POLYCHLORINATED-BIPHENYLS PCBS
- PCB 118
- Toxicity
- EXPOSURE
- Pharmacology & Pharmacy
- RAT
- SUBCHRONIC
- Toxicology
- ELECTRON-MICROSCOPE
- CONGENERS
- stereology
- 2,3 ',4,4 ',5-pentachlorobiphenyl
- enzymes
- 3,3',4,4'-TETRACHLOROBIPHENYL