Oxidative stress and endocrine endpoints in white sucker (Catostomus commersoni) from a river impacted by agricultural chemicals
| Autor: | Christian Deblois, Jocelyn Dorval, Vincent S. Leblond, Alice Hontela |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Cortisol secretion
medicine.medical_specialty Canada Health Toxicology and Mutagenesis Thyroid Gland medicine.disease_cause Antioxidants Lipid peroxidation chemistry.chemical_compound Rivers Internal medicine Endocrine Glands medicine Environmental Chemistry Animals Cholinesterases chemistry.chemical_classification biology Chemistry Glutathione peroxidase Glutathione Hormones Cypriniformes Oxidative Stress Endocrinology Endocrine disruptor Liver Catalase biology.protein Lipid Peroxidation Agrochemicals Oxidative stress Water Pollutants Chemical Hormone |
| Zdroj: | Environmental toxicology and chemistry. 24(5) |
| ISSN: | 0730-7268 |
| Popis: | The effects of agricultural chemicals on cortisol secretion, antioxidants, and lipid peroxidation were investigated in hepatic and adrenal tissue of white sucker (Catostomus commersoni ) from a river (Yamaska) that drains an agricultural region in Quebec (Canada). Plasma cholinesterase (ChE) activity, used as a biomarker of exposure to pesticides, was elevated in fish from the reference site compared to fish from the contaminated sites. Plasma concentrations of cortisol and thyroid hormones (T3 and T4) were higher in fish from the reference site compared to contaminated sites; reduced glutathione (GSH) levels, catalase (CAT), and glutathione peroxidase (GPx) activities were higher and lipid peroxidation (LPO) was lower. Levels of antioxidants (CAT, Gpx, and GSH) were higher (10-90%) and LPO levels were lower (50%) in the liver than in the adrenal tissue. The present in situ study provided evidence that antioxidants, lipid peroxidation, and plasma hormones were altered in fish sampled in areas impacted by agricultural chemicals. Endocrine-disrupting effects were associated with oxidative stress. The results suggest that antioxidants and lipid peroxidation could be used as markers of contaminant exposure in fish. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text