Document Detail


Postmortem tissue levels of polychlorinated biphenyls in female rhesus monkeys after more than six years of daily dosing with Aroclor 1254 and in their non-dosed offspring.
MedLine Citation:
PMID:  7794014     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polychlorinated biphenyl (PCBs) analyses were made on prenecropsy blood samples and postmortem adipose, liver, kidney, and brain tissues from female rhesus monkeys fed a daily dose of 0, 5, 20, 40, or 80 micrograms Aroclor 1254/kg body weight for approximately 6 years. During this time, the females were bred with non-dosed males. All resulting offspring were nursed for 22 weeks and fed no additional PCBs until they were necropsied at approximately 120 weeks after birth. PCBs were also measured in necropsied infant tissues to determine PCB levels due to intake of PCB-contaminated milk from the dosed dams, in addition to in utero exposure. Polychlorinated biphenyl levels in all tissues of the adult monkeys increased with their dosage. The highest PCB levels were found in adipose tissue and the lowest levels were found in the brain. Polychlorinated biphenyl residues in the cortex of the kidney were lower than in the medulla, while in the brain no appreciable differences were observed between the occipital and frontal lobes. Necropsy tissues of infants from dosed dams contained more PCBs than those nursed by controls, but less than tissues from stillborn infants. Although no differences were observed between PCB tissue levels from monkeys having offspring and those having no offspring, those having a stillborn infant had higher PCB levels in their tissues than those with a viable infant. Similarly, monkeys that were euthanized because of poor health had higher PCB levels in their tissues than those necropsied at the conclusion of the study and showed a dramatic shift from tetra- and hexachlorobiphenyls to penta- and heptachlorobiphenyls in their tissues. The PCB distribution pattern in tissues from a dosed mother/infant pair differed considerably. A larger percentage of heptachlorobiphenyls was found in the infant than in its dam. The adipose/blood PCB ratio in the adult monkeys remained remarkably constant.
Authors:
J Mes; D L Arnold; F Bryce
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  29     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  1995 Jul 
Date Detail:
Created Date:  1995-07-21     Completed Date:  1995-07-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  69-76     Citation Subset:  IM    
Affiliation:
Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Ottawa, Ontario, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / metabolism
Animals
Animals, Suckling / metabolism*
Aroclors / pharmacokinetics*
Brain / metabolism
Carcinogens / pharmacokinetics*
Chlorodiphenyl (54% Chlorine)
Female
Kidney / metabolism
Liver / metabolism
Macaca mulatta / metabolism*
Polychlorinated Biphenyls / pharmacokinetics*
Random Allocation
Tissue Distribution
Chemical
Reg. No./Substance:
0/Aroclors; 0/Carcinogens; 0/Polychlorinated Biphenyls; 11097-69-1/Chlorodiphenyl (54% Chlorine)

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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