Methoxylated PBDEs (MeO-PBDEs), hydroxylated PBDEs (HO-PBDEs) and hydroxylated PCBs (HO-PCBs) in the liver of harbor seals from the northwest Atlantic

Weijs, Liesbeth, Shaw, Susan D., Berger, Michelle L., Neels, Hugo, Blust, Ronny and Covaci, Adrian (2014) Methoxylated PBDEs (MeO-PBDEs), hydroxylated PBDEs (HO-PBDEs) and hydroxylated PCBs (HO-PCBs) in the liver of harbor seals from the northwest Atlantic. Science of the Total Environment, 493 606-614. doi:10.1016/j.scitotenv.2014.06.028

Author Weijs, Liesbeth
Shaw, Susan D.
Berger, Michelle L.
Neels, Hugo
Blust, Ronny
Covaci, Adrian
Title Methoxylated PBDEs (MeO-PBDEs), hydroxylated PBDEs (HO-PBDEs) and hydroxylated PCBs (HO-PCBs) in the liver of harbor seals from the northwest Atlantic
Journal name Science of the Total Environment   Check publisher's open access policy
ISSN 0048-9697
Publication date 2014-09-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.scitotenv.2014.06.028
Open Access Status Not yet assessed
Volume 493
Start page 606
End page 614
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
Metabolites of PCBs and PBDEs are shown to influence the thyroid hormone homeostasis and therefore, could have an influence on the growth of newborn or young animals. We have investigated the occurrence of hydroxylated PCBs (HO-PCBs), hydroxylated PBDEs (HO-PBDEs), and methoxylated PBDEs (MeO-PBDEs) in the liver (48 pups; 6 adults) and blubber (4 pups; 1 adult) of harbor seals (Phoca vitulina concolor) from the northwest Atlantic. The sum of HO-PCBs in the liver ranged from 90 to 22,450pg/g wet weight (ww) for pups and from 410 to 5290pg/g ww for adults. Congener 4-HO-CB 107 was predominant in almost all samples regardless of age or gender, except in one adult male. Sum HO-PCB concentrations were highly correlated with the sum of precursor PCBs in the liver of harbor seals (r2=0.79; p<0.0001). Concentrations of sum HO-PBDEs in the liver ranged from 70 to 1850pg/g ww for pups and from 90 to 230pg/g ww for adults. HO-PBDEs were also correlated with PBDEs (r2=0.58; p<0.0001). Sum MeO-PBDE concentrations in the liver ranged from 20 to 1460pg/g ww in pups and from 10 to 270pg/g ww in adults. HO-PCBs and HO-PBDEs were not detected in the blubber. Levels of MeO-PBDEs in the blubber ranged from 1500 to 4400pg/g ww. In all blubber samples, 6-MeO-BDE 47 was the predominant MeO-PBDE congener, followed by 2'-MeO-BDE 68 and 5-MeO-BDE 47, respectively. The presence of HO-metabolites in pup liver suggests that young harbor seals may have some, yet limited, metabolic capacity for PCBs and PBDEs, which can lead to an excessive accumulation of these chemicals in the body. Moreover, the presence of HO-PCB and HO-PBDE metabolites may pose an additional stress for young harbor seals due to their influence on the thyroid hormone system and could have consequences for the entire population.
Keyword Harbor seals
Northwest Atlantic
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 2009/4080
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: National Research Centre for Environmental Toxicology Publications
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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