期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 108, 期 -, 页码 1-8出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2014.06.025
关键词
Oxidative stress; Tocopherols; Herbicides; Atrazine; Freshwater invertebrates
资金
- Agencia Nacional de Promocion Cientifica y Tecnologica [FONCyT/PICT-2007-01209, 20111597]
- CONICET (National Scientific and Technical Research Council) [PIP 112-200801-02190, PIP 112-201101-01084]
- Universidad Nacional de Cordoba [162/12, 124/13]
The widespread contamination and persistence of the herbicide atrazine residues in the environment resulted in the exposure of non-target organisms. The present study was undertaken to investigate the effect of atrazine in the response of oxidative stress biomarkers in the freshwater shrimp Palaemonetes argentinus and the protective effect of vitamin-E against atrazine-induced toxicity. Therefore, two batches of P. argentinus were fed for 21 days with a commercial food enriched in proteins (D1) or with D2, composed of D1 enriched with vitamin-E (6.8 and 16.0 mg% of vitamin-E, respectively). Subsequently, half of the individuals of each group were exposed to atrazine (0.4 mg L-1) for 24 h and the others remained as controls. Atrazine promoted oxidative stress response in P. argentinus fed with D1 as indicated by enhanced H2O2 content and induction of superoxide dismutase, glutathione-S-transferases and glutathione reductase. This antioxidant activity would prevent the increment of thiobarbituric acid reactive substances in the shrimp tissues. P. argentinus fed with D2 reversed the response of the biomarkers measured. However, the activation of antioxidants response had an energetic cost, which was revealed by a decrease in lipids storage in shrimps. These results show the modulatory effect of vit-E on oxidative stress and its potential use as an effective antioxidant to be applied in chemoprotection strategies during aquaculture. (C) 2014 Elsevier Inc. All rights reserved.
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