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OXIDATIVE STRESS RESPONSES AND HISTOLOGICAL HEPATIC ALTERATIONS IN BARBEL, Barbus bocagei, FROM VIZELA RIVER, PORTUGAL
Francisco P. PEIXOTO, João CARROLA, Ana Maria COIMBRA, Conceição FERNANDES, Paulo TEIXEIRA, Luís COELHO, Ivo CONCEIÇÃO, Maria Manuel OLIVEIRA, António FONTAÍNHAS-FERNANDES;
Revista Internacional de Contaminación Ambiental 2013 29(1)
Resumen
Inglés Español
Barbel (Barbus bocagei) a common species in Portuguese rivers was studied to assess the impact of water contamination on hepatic oxidative stress response, lipid peroxidation and histology. The Vizela River is a tributary of the Ave River, located in one of the most industrialized areas of Portugal. The oxidative stress biomarkers analyzed included superoxide dismutase, catalase, glutathione S-transferase, glutathione reductase, glucose 6‑phosphate dehydrogenase and xanthine oxidase activities. Levels of reduced glutathione and lipid peroxidation were also evaluated. Except xanthine oxidase activity, that did not show any alteration, all the other enzymatic activities were increased in the liver of barbel captured in the Vizela River when compared with reference barbel. While, no differences were observed for glutathione reductase content, lipid peroxidation was higher in barbel from the Vizela River. Liver histological alterations were determined and their severityscored. Though lymphocyte foci were only observed in Vizela River barbel, macrophage aggregates were also present in reference barbel, although the severity score was higher in Vizela fish. The results of this study show that barbel liver oxidative stress responses, lipid peroxidation and histology are sensitive to the contaminants present in Vizela River water and are valuable biomarkers for monitoring purposes.

Palabras clave: Oxidative stress enzymes, lipid peroxidation, fish, freshwater, liver histopathology.
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Universidad Autónoma del Estado de México
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