Hepatic elemental contents and antioxidant enzyme activities in Algerian mice ( Mus spretus) inhabiting a mine area in central Portugal

• Published in: The Science of the total environment Vol. 311; no. 1; pp. 101 - 109
• Main Authors: Viegas-Crespo, A.M., Lopes, P.A., Pinheiro, M.T., Santos, M.C., Rodrigues, P.D., Nunes, A.C., Marques, C., Mathias, M.L.
• Format: Journal Article
• Language: English
• Published: Shannon Elsevier B.V 20-07-2003; Elsevier Science
• Subjects: Animal, plant and microbial ecology; Animals; Antioxidants; Applied ecology; Biological and medical sciences; Copper; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Elemental pollution; Female; Fundamental and applied biological sciences. Psychology; Glutathione S-transferase (GST); Glutathione Transferase - analysis; Glutathione Transferase - pharmacology; Liver - chemistry; Liver - enzymology; Male; Mammalia; Metals, Heavy - adverse effects; Mice; Mining; Portugal; Reproducibility of Results; Selenium; Selenium - adverse effects; Small mammals; Superoxide dismutase (SOD); Superoxide Dismutase - analysis; Superoxide Dismutase - pharmacology; Portugal; Europe; Antioxidants; Superoxide dismutase (SOD); Elemental pollution; Glutathione S-transferase (GST); Selenium; Small mammals; Liver; Superoxide dismutase; Soil pollution; Enzymatic activity; Glutathione transferase; Seasonal variation; Mine; Copper; Enzyme; Digestive system; Transferases; Rodentia; Antioxidant; Heavy metal; Pollutant; Vertebrata; Mammalia; Muridae; Oxidoreductases; Biological accumulation
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/S0048-9697(03)00136-0

In this study the effects of heavy metals (manganese, iron, copper, zinc) and selenium exposure on the hepatic activity of antioxidant enzymes, superoxide dismutase (SOD) and glutathione
S-transferases (GST), were appraised on a seasonal basis in Algerian mice (
Mus spretus) inhabiting an active copper mine area. A reference population of the same species was considered for comparative purposes. Different patterns of seasonal variation were found in both populations for the manganese, iron and selenium hepatic concentrations and SOD activity. When the two populations were compared, iron and selenium concentrations were enhanced in mice from the polluted area. In addition, SOD activity was significantly decreased in summer in exposed mice, but no other significant changes in SOD and GST activities between sites throughout the year were recorded. However, when seasonal data within each group of mice were pooled, significant differences were found between sites for the average concentrations of manganese, iron and selenium, which are higher in the polluted site. In addition, significant differences were obtained for the average values of SOD and of GST activities, due to simultaneously higher GST values and slightly lower SOD values in the polluted site. The population from the reference site was more homogeneous for all parameters measured than the population from the polluted area. These results, in particular the higher variability in data collected from mice exposed to heavy metals and selenium, combined with the negative associations between biochemical markers and heavy metals, may suggest, despite the good adaptability of the mice to their habitat, biochemical stress due to diminished environmental quality.