Oxidative stress responses in two populations of Laeonereis acuta (Polychaeta, Nereididae) after acute and chronic exposure to copper

• Published in: Marine environmental research 2004-07, Vol.58 (1), p.1-17
• Main Authors: Geracitano, L.A, Bocchetti, R, Monserrat, J.M, Regoli, F, Bianchini, A
• Format: Article
• Language: English
• Subjects: Analysis of Variance; Animal and plant ecology; Animal, plant and microbial ecology; Animals; Biological and medical sciences; Biomarker; Brazil; Catalase; Copper; Copper - toxicity; Fundamental and applied biological sciences. Psychology; Glutathione Transferase; Laeonereis acuta; Lipid peroxidation; Lipid Peroxidation - drug effects; Marine; Metallothionein-like proteins; Oxidative stress; Oxidative Stress - drug effects; Oxygen Consumption; Pollution effect; Pollution-induced community tolerance; Polychaeta; Polychaeta - drug effects; Polychaeta - physiology; Sea water ecosystems; Sulfhydril groups; Superoxide Dismutase; Synecology; TOSC; Toxicity Tests; Water Pollutants, Chemical - toxicity
• ISSN: 0141-1136; 1879-0291
• DOI: 10.1016/j.marenvres.2003.09.001

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 μg Cu/l) 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 μg 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.