Antioxidant responses and bioaccumulation in Ictalurus melas under mercury exposure
| Autor: | Maria Illuminata Taticchi, Ambrosius Josef Martin Dörr, Antonia Concetta Elia, Luciana Mantilacci, Roberta Galarini |
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| Rok vydání: | 2003 |
| Předmět: |
animal structures
Antioxidant Health Toxicology and Mutagenesis medicine.medical_treatment Ictalurus melas chemistry.chemical_element medicine.disease_cause Antioxidants Lactoylglutathione lyase chemistry.chemical_compound medicine Animals Tissue Distribution Ictaluridae Glutathione Transferase Glutathione Peroxidase biology Public Health Environmental and Occupational Health Glutathione-dependent enzymes Mercury General Medicine Glutathione biology.organism_classification Pollution Mercury (element) Glutathione Reductase chemistry Biochemistry Ictalurus Glutathione Glutathione-dependent enzymes Mercury toxicity Ictalurus melas Mercury toxicity biology.protein Oxidative stress Catfish |
| Zdroj: | Ecotoxicology and Environmental Safety. 55:162-167 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/s0147-6513(02)00123-9 |
| Popis: | 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 Hg 2+ (35, 70, and 140 μg/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 II enzymes were observed. An increasing trend was observed also for GSH- S -transferase and glyoxalase I, 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. |
| Databáze: | OpenAIRE |
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