Oxidative stress responses in zebrafish Danio rerio after subchronic exposure to atrazine |
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| Institution: | 1. Programa de Pós-graduação em Ciências Ambientais, Área de Ciências Naturais e Exatas, Universidade Comunitária da Região de Chapecó, Avenida Senador Attílio Fontana, 591E, 89809–000 Chapecó, SC, Brazil;2. Programa de Pós-graduação em Zoologia, Faculdade de Biociências, Pontifícia Universidade Católica do Rio Grande do Sul, Avenida Ipiranga, 6681, 90619–900, Porto Alegre, RS, Brazil;3. Department of Psychology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA;4. Instituto Nacional de Ciência e Tecnologia em Excitotoxicidade e Neuroproteção (INCT-EN), 90035–003, Porto Alegre, RS, Brazil;5. Zebrafish Neuroscience Research Consortium (ZNRC);1. Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. Institute of Advanced Technology (ITMA), Seri Kembangan, 43400 Serdang, Selangor, Malaysia;4. Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;1. Faculty of Chemistry, Universidad Nacional Autónoma de México, Sisal, Yucatan, Mexico;2. Faculty of Sciences, Universidad Nacional Autónoma de México, Sisal, Yucatan, Mexico;3. Department of Environmental Sciences, University of California Riverside, Riverside, United States |
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| Abstract: | Atrazine is one of the most used pesticides all over the world and it is frequently detected in surface water. The aim of this study was to investigate if zebrafish exposure to atrazine could induce oxidative stress and changes in detoxifying system. Juvenile fish were exposed to sublethal concentrations of 0.3, 3, 30, or 90 μg L?1 for 28 days. The level of oxidized lipids increased in experimental groups exposed to atrazine at 30 and 90 μg L?1 compared to control. Activity of glutathione S-transferase decreased in group with the highest concentration compared to control. A significant decline was observed in catalase activity in all experimental groups compared to control. Activity of superoxide dismutase increased only in experimental group exposed to atrazine at 30 μg L?1 compared to control. Activity of glutathione peroxidase and reductase (GR) increased in experimental groups exposed to atrazine at 0.3 (only for GR activity) and 90 μg L?1 compared to control. Our results showed that atrazine exposure had profound influence on the oxidative stress markers and detoxifying enzyme of the exposed zebrafish. The changes in antioxidant enzyme activities could be an adaptive response to protect the fish from the atrazine-induced toxicity. |
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