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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Richardson, Bruce J. Mak, Eva De Luca-Abbott, Sharon B. Martin, Michael McClellan, Katherine Lam, Paul K. S. |
| Description | Country affiliation: Hong Kong Author Affiliation: Richardson BJ ( Department of Biology and Chemistry, Research Centre for Coastal Pollution and Conservation, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong. bhbrucer@cityu.edu.hk) |
| Abstract | Polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCs) are generally present in the marine environment in complex mixtures. The ecotoxicological nature of contaminant interactions, however, is poorly understood, with most scientific observations derived from single contaminant exposure experiments. The objective of this experiment was to examine dose-response relationships between antioxidant parameters and body contaminant levels in mussels exposed to different exposure regimes under laboratory conditions. Accordingly, the green-lipped mussel, Perna viridis, was challenged with a mixture of PAHs (anthracene, fluoranthene, pyrene, benzo[a]pyrene) and OC pesticides (alpha-HCH, aldrin, dieldrin, p,p'-DDT) over a 4 week period. Contaminants were delivered under four different dosing regimes, with all treatments receiving the same total contaminant load by the end of the exposure period. Antioxidant biomarkers were measured after 1, 2, 3 and 4 weeks, including glutathione (GSH), gluathione-S-transferase (GST), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and lipid peroxidase (LPO). GST and CAT were induced in hepatic tissues in most of the exposure regimes, with the majority of significant induction occurring in a constant exposure regime and a two-step alternate exposure regime. Significant differences among exposure regimes were detected in the body burden of contaminants after 28 days. Hepatic CAT and GSH are proposed as potentially useful biomarkers as they showed good correlation with target contaminants and were not readily affected by different dosing patterns. |
| File Format | HTM / HTML |
| ISSN | 0025326X |
| Issue Number | 6-12 |
| Volume Number | 57 |
| e-ISSN | 18793363 |
| Journal | Marine Pollution Bulletin |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2008-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biology Antioxidants Metabolism Hydrocarbons, Chlorinated Toxicity Perna Drug Effects Pesticides Polycyclic Hydrocarbons, Aromatic Water Pollutants, Chemical Animals Biological Markers Gills Hepatopancreas Pharmacokinetics Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pollution Aquatic Science Oceanography |
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