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Congener-specific tissue distribution of aroclor 1254 and a highly chlorinated environmental PCB mixture in rats
Journal article   Peer reviewed

Congener-specific tissue distribution of aroclor 1254 and a highly chlorinated environmental PCB mixture in rats

Izabela Kania-Korwel, Keri C Hornbuckle, Aaron Peck, Gabriele Ludewig, Larry W Robertson, Wieslaw W Sulkowski, Parvaneh Espandiari, C Gary Gairola and Hans-Joachim Lehmler
Environmental science & technology, Vol.39(10), pp.3513-3520
05/15/2005
DOI: 10.1021/es047987f
PMID: 15954224

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Abstract

Polychlorinated biphenyl (PCB) mixtures were synthesized and marketed in Eastern European countries, but little is known abouttheir composition, distribution, ortoxicity. PCB-contaminated soil from the former production site of the Polish PCB mixture Chlorofen was collected, and the PCBs were extracted. An in vivo study was performed to investigate the PCB tissue distribution and biochemical effects of this soil extract in immature male Sprague-Dawley rats. Rats were administered 0.05 mmol/kg soil-extracted PCBs or Aroclor 1254 and sacrificed 7 days later, and congener-specific PCB profiles in selected tissues were determined. Distribution of SigmaPCBs (sum of 120 congeners) in tissues was primarily a function of lipid content of the tissues, except for the spleen, which retained more PCB than other tissues. Multivariate analysis of the PCB congener data showed that (a) congener profiles in tissues had changed, as compared to the parent mixture; (b) disposition and redistribution of individual congeners in vivo differed between both mixtures; and (c) more highly chlorinated congeners were retained in the spleens of both treatment groups. Differences in the induction of cytochrome P-450 1A and 2B subfamilies reflected the homologue composition of the respective mixtures and predict a different toxicity profile for Chlorofen than for Aroclor 1254.
Poland Myocardium - chemistry Lung - chemistry Polychlorinated Biphenyls - blood Male Soil Pollutants - isolation & purification Brain - metabolism Tissue Distribution Cytochrome P-450 CYP2B1 - metabolism Microsomes, Liver - enzymology Rats Hazardous Waste Polychlorinated Biphenyls - metabolism Cytochrome P-450 CYP1A1 - metabolism Soil Pollutants - blood Rats, Sprague-Dawley Liver - chemistry Spleen - chemistry Skin - chemistry Soil Pollutants - metabolism Animals Kidney - chemistry Adipose Tissue - chemistry Lipids - analysis Polychlorinated Biphenyls - isolation & purification

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