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Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper, and pentachlorophenol.
Environ Toxicol. 2010 Apr; 25(2):198-211.ET

Abstract

Freshwater mussels Dreissena polymorpha (Pallas, 1771) were exposed to the elevated concentrations of Cd (10, 50, 100, and 500 microg/L), Cu (10, 30, 50, and 80 microg/L), and an organochlorinated pesticide, pentachlorophenol (PCP) (1, 10, and 100 microg/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 microg/L, and this increase of MT content was accompanied with a linear increase of cytosolic Cd. Cd concentration of 500 microg/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.

Authors+Show Affiliations

Department for Marine and Environmental Research, Rudether Bosković Institute, P.O. Box 180, Zagreb HR-10002, Croatia. djuric@irb.hrNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19365804

Citation

Ivanković, Dusica, et al. "Inducibility of Metallothionein Biosynthesis in the Whole Soft Tissue of Zebra Mussels Dreissena Polymorpha Exposed to Cadmium, Copper, and Pentachlorophenol." Environmental Toxicology, vol. 25, no. 2, 2010, pp. 198-211.
Ivanković D, Pavicić J, Beatović V, et al. Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper, and pentachlorophenol. Environ Toxicol. 2010;25(2):198-211.
Ivanković, D., Pavicić, J., Beatović, V., Klobucar, R. S., & Klobucar, G. I. (2010). Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper, and pentachlorophenol. Environmental Toxicology, 25(2), 198-211. https://doi.org/10.1002/tox.20489
Ivanković D, et al. Inducibility of Metallothionein Biosynthesis in the Whole Soft Tissue of Zebra Mussels Dreissena Polymorpha Exposed to Cadmium, Copper, and Pentachlorophenol. Environ Toxicol. 2010;25(2):198-211. PubMed PMID: 19365804.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Inducibility of metallothionein biosynthesis in the whole soft tissue of zebra mussels Dreissena polymorpha exposed to cadmium, copper, and pentachlorophenol. AU - Ivanković,Dusica, AU - Pavicić,Jasenka, AU - Beatović,Vanja, AU - Klobucar,Roberta Sauerborn, AU - Klobucar,Göran Igor Vinko, PY - 2009/4/15/entrez PY - 2009/4/15/pubmed PY - 2010/4/17/medline SP - 198 EP - 211 JF - Environmental toxicology JO - Environ. Toxicol. VL - 25 IS - 2 N2 - Freshwater mussels Dreissena polymorpha (Pallas, 1771) were exposed to the elevated concentrations of Cd (10, 50, 100, and 500 microg/L), Cu (10, 30, 50, and 80 microg/L), and an organochlorinated pesticide, pentachlorophenol (PCP) (1, 10, and 100 microg/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 microg/L, and this increase of MT content was accompanied with a linear increase of cytosolic Cd. Cd concentration of 500 microg/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. SN - 1522-7278 UR - https://www.unboundmedicine.com/medline/citation/19365804/Inducibility_of_metallothionein_biosynthesis_in_the_whole_soft_tissue_of_zebra_mussels_Dreissena_polymorpha_exposed_to_cadmium_copper_and_pentachlorophenol_ L2 - https://doi.org/10.1002/tox.20489 DB - PRIME DP - Unbound Medicine ER -