Application of a biomarker battery for the evaluation of the sublethal effects of pollutants in the earthworm Eisenia andrei. - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Comparative Biochemistry and Physiology - Part C: Toxicology and Pharmacology Année : 2007

Application of a biomarker battery for the evaluation of the sublethal effects of pollutants in the earthworm Eisenia andrei.

Résumé

We applied a battery of biomarkers in the earthworm Eisenia andrei to assess the pollutant-induced stress syndrome. Earthworms were exposed to sublethal concentrations of copper (1–10 μM) and benzo[a]pyrene (0.01–10 μM) as models of inorganic and organic pollutants for 1, 3 and 7 days. Four potential biomarkers of stress were measured: lysosomal membrane stability of coelomocytes, lysosomal accumulation of lipofuscin in chloragogenous tissue and of neutral lipids in coelomatic cells, plasma membrane Ca2+-ATPase activity in the intestinal epithelium; metallothionein content was also evaluated as a biomarker of exposure. Significant changes were observed in the parameters measured in earthworms exposed to both contaminants. Certain biomarkers, such as lysosomal membrane stability and Ca2+-ATPase activity, that showed a decreasing trend with increasing pollutant concentration and time of exposure, proved to be particularly suitable to describe the evolution of a stress syndrome from its early phase to the development of pathological conditions. On the other hand, contaminant-induced changes in lysosomal lipofuscin and neutral lipid accumulation showed a bell-shaped trend, indicating that these biomarkers are able to follow the development of pollutant-induced stress syndrome as far as an equilibrium in the cell functions is maintained; therefore, they are particularly useful to describe mild stress conditions.

Dates et versions

hal-00188185 , version 1 (15-11-2007)

Identifiants

Citer

Laura Gastaldi, Elia Ranzato, Flavia Capri, Peter Hankard, Guénola Pérès, et al.. Application of a biomarker battery for the evaluation of the sublethal effects of pollutants in the earthworm Eisenia andrei.. Comparative Biochemistry and Physiology - Part C: Toxicology and Pharmacology, 2007, 146 (3), pp.398-405. ⟨10.1016/j.cbpc.2007.04.014⟩. ⟨hal-00188185⟩
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