Short-term responses to cadmium exposure in the estuarine polychaete Laeonereis acuta (polychaeta, Nereididae): subcellular distribution and oxidative stress generation.

摘要: Some effects of cadmium exposure (100 μg/L for 4, 8, 12, and 24 h) on the estuarine polychaete Laeonereis acuta (Nereididae) were evaluated. This was able to accumulate in body, with metal stored mainly cytosolic fraction (>10 kDa). Activity antioxidant enzymes superoxide dismutase, glutathione S-transferase, reductase (GR) as well total oxyradical scavenger capacity, glutamate cysteine ligase catalytic subunit gene expression, metallothionein-like proteins content not affected by at any time tested. Catalase (CAT) activity, however, significantly lower (p < 0.05) worms treated compared that controls after 8 h exposure. At same time, lipid peroxide levels increased exposed those control worms. Interestingly, CAT GR activities decreased over independent treatment, which is a result could be attributed starvation. The caused present study observed only exposure, demonstrating can generate oxidative stress.