Journal
MARINE ENVIRONMENTAL RESEARCH
Volume 58, Issue 1, Pages 1-17Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2003.09.001
Keywords
biomarker; copper; lipid peroxidation; metallothionein-like proteins; oxidative stress; pollution effect; pollution-induced community tolerance; polychaeta; sulfhydril groups; TOSC
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Acute (4 days) and chronic (14 days) effects of copper were evaluated on the antioxidant defenses of Laeonereis acuta (Polychaeta) collected in unpolluted (UP) and polluted (P) sites. In the acute assay (125 and 250 mug Cull) superoxide dismutase (SOD) and glutathione S-transferase (GST) activities did not change, whereas catalase (CAT) increased in worms from both the sites. Lipid peroxidation was higher in copper exposed worms from the P site. In the chronic assay (62.5 mug Cu/l) polychaetes from the P site showed enhanced activities of SOD, GST and CAT and higher contents of metallothionein-like proteins and sulfhydrils compared to worms from UP. Differences in responses between polychaetes from UP and P sites suggest that organisms from the polluted site, P, are more susceptible to oxidative stress conditions. (C) 2004 Elsevier Ltd. All rights reserved.
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