Metal accumulation and metallothionein in brown trout, Salmo trutta, from two Norwegian rivers differently contaminated with Cd, Cu and Zn
| Autor: | Rolf A. Andersen, Karl Erik Zachariassen, Pål Gundersen, Pål A. Olsvik |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Gill
endocrine system animal structures Physiology Trout animal diseases Health Toxicology and Mutagenesis Toxicology Biochemistry Acclimatization Metal Brown trout Metallothionein Animals Salmo biology urogenital system Chemistry Ecology Norway Cell Biology General Medicine Contamination biology.organism_classification Zinc visual_art Environmental chemistry visual_art.visual_art_medium Copper Water Pollutants Chemical Cadmium |
| Zdroj: | Comparative biochemistry and physiology. Toxicologypharmacology : CBP. 128(2) |
| ISSN: | 1532-0456 |
| Popis: | In this work we have studied the accumulation of heavy metals in two brown trout (Salmo trutta) populations in their natural environment and the participation of metal binding to metallothionein (MT) in this process. Cd, Cu and Zn concentrations, total MT (including Cu MT) and Cd/Zn MT were measured in the gills, liver and kidney of trout inhabiting two rivers, one Cu-contaminated and the other Cd/Zn-contaminated, located at Roros, Central Norway. In both populations, high levels of Cu were found in the liver, whereas Cd was accumulated in liver and particularly in the kidney. The proportions of Cd/Zn MT and Cu MT in liver and kidney, but not in gills, reflected the accumulated and the environmental concentrations of these metals. The total Cu MT concentrations in the investigated tissues, however, were highest in trout from the river with the lowest ambient Cu concentration. It is suggested that MTs are of less importance in Cu-acclimated trout. The data also suggest that acclimation to a Cu-rich environment involves reduced Cu accumulation or increased Cu elimination. In trout from the Cd-rich environment, this metal was mainly bound to MT, whereas in trout from the Cu-rich environment Cd was also associated with non-MT proteins. These findings emphasize the importance to determine both Cd/Zn MT and Cu MT levels, when the participation of this protein in metal handling in trout tissues is investigated. |
| Databáze: | OpenAIRE |
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