Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 55, Issue 2, Pages 162-167Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0147-6513(02)00123-9
Keywords
glutathione; glutathione-dependent enzymes; mercury toxicity; Ictalurus melas
Categories
Ask authors/readers for more resources
Laboratory experiment was carried out to determine mercury accumulation in tissues (gills, kidneys, liver, and muscle) and biochemical responses in the liver of freshwater teleost Ictalurus melas. Catfish were subjected to different concentrations of Hg2+ (35, 70, and 140 mug/L) for 10 days. The chemical analyses showed higher mercury concentrations for all treatments in gills and kidneys followed by liver and muscle. At the lowest mercury concentration a decrease in glutathione (GSH) content and an increase of GSH peroxidase Se-dependent and glyoxalase 11 enzymes were observed. An increasing trend was observed also for GSH-S-transferase and glyoxalase 1, while GSH peroxidase Se-independent enzyme and GSH reductase showed no significant variation in activities. The increase in the enzymes activities of catfish, involved in the inactivation of reactive molecules formed during oxidative stress, could provide an additional protection against the oxidative damage induced by mercury. (C) 2003 Elsevier Science (USA). All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available