Document Detail


Toxicokinetics of three polychlorinated biphenyl technical mixtures in rainbow trout (Oncorhynchus mykiss).
MedLine Citation:
PMID:  15230325     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Accumulation and depuration parameters of polychlorinated biphenyls (PCBs) in fish have been reported only for a few congeners. As well, there is little information on the ability of fish to biotransform PCBs. To address these issues, juvenile rainbow trout (Oncorhynchus mykiss) were exposed to dietary concentrations of three Aroclor mixtures (1248, 1254, 1260) in food for 30 d followed by an additional 160 d of nonspiked food at 8 degrees C. Accumulation, depuration, and potential biotransformation of 92 PCB congeners were assessed. Half-lives (t1/2) of PCB congeners ranged from 79 to 182 d, assimilation efficiencies ranged from 40 to 50% and biomagnification factors (BMF) ranged from 2.9 to 6.9. No evidence of significant biotransformation of any PCB congeners was found. All 92 congeners fell on the same t1/2 to Kow relationship as 16 preselected PCB congeners previously shown to persist in fish and no hydroxylated PCB metabolites (OH-PCBs) were detected in the plasma after 30 d of exposure. These findings suggest that OH-PCBs observed in feral fish may be accumulated from sources other than internal metabolism of the parent congeners, at least for juvenile fish at cool temperatures. Because t1/2s in this experiment were slower than t1/2s reported in other work, water temperature also may be an important factor in determining the t1/2s of all PCB congeners in fish.
Authors:
Andrea H Buckman; Scott B Brown; Paul F Hoekstra; Keith R Solomon; Aaron T Fisk
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  23     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-07-02     Completed Date:  2004-09-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1725-36     Citation Subset:  IM    
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1 Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Biotransformation
Cytochrome P-450 CYP1A1 / metabolism
Diet
Food Contamination*
Half-Life
Hydroxylation
Polychlorinated Biphenyls / chemistry,  pharmacokinetics*,  toxicity
Temperature
Trout / metabolism*
Water Pollutants, Chemical / pharmacokinetics*,  toxicity
Chemical
Reg. No./Substance:
0/Polychlorinated Biphenyls; 0/Water Pollutants, Chemical; EC 1.14.14.1/Cytochrome P-450 CYP1A1

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


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