INVESTIGADORES
AME Maria Valeria
artículos
Título:
Oxidative stress response induced by Atrazine in Palaemonetes argentinus: the protective effect of Vitamin E
Autor/es:
GRIBOFF, JULIETA; MORALES, DAVID; BERTRAND, LIDWINA; BONANSEA, ROCÍO; MONFERRÁN, MAGDALENA VICTORIA; ASIS, RAMÓN; WUNDERLIN, DANIEL ALBERTO; AMÉ, MARÍA VALERIA
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 108 p. 1 - 8
ISSN:
0147-6513
Resumen:
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 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.