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Tissue-specific contaminant accumulation and associated effects on hepatic serum analytes and cytochrome P450 enzyme activities in hooded seals (Cystophora cristata) from the Gulf of St. Lawrence
Örebro University, School of Science and Technology. (MTM)ORCID iD: 0000-0001-6217-8857
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2009 (English)In: Archives of Environmental Contamination and Toxicology, ISSN 0090-4341, E-ISSN 1432-0703, Vol. 56, no 2, p. 360-370Article in journal (Refereed) Published
Abstract [en]

The current study aims to assess contaminant levels and tissue burdens in hooded seal (Cystophora cristata) blubber, liver, and blood in association with cytochrome P450 (CYP) enzymes (CYP1A and -3A) and serum analytes (hepatic enzymes like alanine aminotransferase [ALT], aspartate aminotransferase, alkaline phosphatase [AP], and gamma-glutamyltransferase [GGT], serum proteins, and creatine kinase). Contaminant accumulation levels and patterns of polychlorinated biphenyls, chlorinated pesticides, and polybrominated diphenyl ethers (PBDEs) differed between tissues and seal groups, with the highest levels in liver. Pups showed higher liver contaminant levels, especially for PBDEs, than adults. These high levels might be associated with the ingestion of large amounts of contaminated milk and subsequent accumulation in the liver. Adult males and females mainly differed in PBDE levels, which were higher in females, possibly due to a sex-specific diet. The association between blubber contaminant burdens and the diagnostic enzymes ALT, GGT, and AP, and serum albumin, was inconclusive. In contrast, several CYP isoenzymes showed a clear positive relationship with the overall blubber contaminant burden, indicating enzyme induction following exposure to polyhalogenated hydrocarbons. Therefore, liver CYP isoenzymes may serve as a sensitive biomarker for long-term exposure to polyhalogenated hydrocarbons.

Place, publisher, year, edition, pages
Berlin: Springer, 2009. Vol. 56, no 2, p. 360-370
National Category
Natural Sciences Chemical Sciences
Research subject
Chemistry
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URN: urn:nbn:se:oru:diva-5291DOI: 10.1007/s00244-008-9186-6ISI: 000264461300021PubMedID: 18626617Scopus ID: 2-s2.0-58149469946OAI: oai:DiVA.org:oru-5291DiVA, id: diva2:158636
Available from: 2009-02-03 Created: 2009-02-03 Last updated: 2017-12-14Bibliographically approved

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van Bavel, Bert

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