Document Detail


Distribution of PCB 118 and PCB 153 and hydroxylated PCB metabolites (OH-CBs) in maternal, fetal and lamb tissues of sheep exposed during gestation and lactation.
MedLine Citation:
PMID:  20605042     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The main objective of the present study was to gain knowledge about the disposition of the PCB congeners 118 and 153 in a sheep model where ewes were given oral doses of PCB in two consecutive gestations. The study aimed to investigate how maternal exposure with PCBs affected tissue concentrations in lambs and fetuses and to carry out time trend studies in ewes between gestations, as well as to increase the knowledge on metabolic processes by studying OH-metabolites. The results showed that the fetuses accumulated PCBs in levels and composition comparable to the ewes. The mean fetus/mother ratios of adipose tissue levels ranged from 0.71 to 0.82 for both PCB 118 and PCB 153 in the two exposure groups. Furthermore, the fetal brain/fat ratios ranged from 0.15 to 0.20 for both congeners. Body burden calculations (BB) showed that 16% and 43% of the total PCB 118 and PCB 153, respectively, still remained in ewes, lambs and fetuses after exposure during two gestations. The different accumulation of the two congeners is assumed to be a result of differences in metabolism. The present study demonstrate that high levels of PCB 118 and PCB 153 cross the placenta and accumulate in the fetal adipose tissue and brain thus exposing the fetus during vulnerable periods of extensive development.
Authors:
Vidar Berg; Jan L Lyche; Arno C Gutleb; Elisabeth Lie; Janneche Utne Skaare; Mona Aleksandersen; Erik Ropstad
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chemosphere     Volume:  80     ISSN:  1879-1298     ISO Abbreviation:  Chemosphere     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-09     Completed Date:  2010-12-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  1144-50     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier Ltd. All rights reserved.
Affiliation:
Norwegian School of Veterinary Science, Department of Food Safety and Infection Biology, POB 8146 Dep., N-0033 Oslo, Norway. vidar.berg@nvh.no
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Environmental Pollutants / analysis,  metabolism
Female
Fetus / metabolism*
Hydroxylation
Lactation
Maternal Exposure*
Polychlorinated Biphenyls / analysis,  metabolism*
Pregnancy
Sheep / metabolism*
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Polychlorinated Biphenyls; 31508-00-6/2,3',4,4',5-pentachlorobiphenyl; 35065-27-1/2,4,5,2',4',5'-hexachlorobiphenyl

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


Previous Document:  Trace element availability in a sewage sludge-amended cotton grown Mediterranean soil.
Next Document:  Theoretical targets for TCDD: a bioinformatics approach.