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Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper and pentachlorophenol (CROSBI ID 147913)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Ivanković, Dušica ; Pavičić, Jasenka ; Beatović, Vanja ; Sauerborn Klobučar, Roberta ; Klobučar, Göran Igor Vinko Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper and pentachlorophenol // Environmental toxicology, 25 (2010), 2; 198-211. doi: 10.1002/tox.20489

Podaci o odgovornosti

Ivanković, Dušica ; Pavičić, Jasenka ; Beatović, Vanja ; Sauerborn Klobučar, Roberta ; Klobučar, Göran Igor Vinko

engleski

Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper and pentachlorophenol

Freshwater mussels Dreissena polymorpha (Pallas, 1771) were exposed to the elevated concentrations of Cd (10, 50, 100, and 500 μg/L), Cu (10, 30, 50, and 80 μg/L), and an organochlorinated pesticide, pentachlorophenol (PCP) (1, 10, and 100 μg/L). Induced synthesis of biomarker metallothionein (MT) and changes in concentrations of cytosolic Cd, Cu, and Zn in the whole soft tissue of mussels were monitored after a 7‐day laboratory exposure to the contaminants. A clear dose‐dependent elevation in the MT concentration was observed after exposure to Cd at doses of 10–100 μg/L, and this increase of MT content was accompanied with a linear increase of cytosolic Cd. Cd concentration of 500 μg/L caused no additional increase of MT and Cd in mussel cytosol, suggesting possible toxic effects due to exceeding cellular inducible/defense capacity. Cu exposure resulted with variable changes in MT concentrations, with no clear linear relationship between MT and Cu concentrations in water, although a progressive dose‐dependent accumulation of Cu in the soluble fraction of mussel tissues was recorded. A decrease of cytosolic Zn was evident at higher exposure concentrations of both metals used. PCP in concentrations applied was unable to induce MT synthesis, but the higher concentrations of PCP influenced the cytosolic metal concentrations. In conclusion, the results obtained confirm the specificity of MT induction in D. polymorpha as an biological response on metal stimulation, especially by cadmium, being more closely correlated to MT than copper within the ecologically relevant concentration range. The strong induction potential of cadmium as well as an absence of MT induction following exposure to PCP as an organic chemical contaminant are supporting evidences for usage of zebra mussel MT as a specific biomarker of Cd exposure in biomonitoring programs.

metallothionein ; cadmium ; copper ; pentachlorophenol ; Dreissena polymorpha ; biomarker

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Podaci o izdanju

25 (2)

2010.

198-211

objavljeno

1520-4081

10.1002/tox.20489

Povezanost rada

Geologija, Biologija

Poveznice
Indeksiranost