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Effects of dietary selenium on the oxidative stress and pathological changes in tilapia (Oreochromis niloticus) exposed to a microcystin-producing cyanobacterial water bloom.
Toxicon. 2009 Feb; 53(2):269-82.T

Abstract

The present study investigates the role of selenium (Se) supplementation (as sodium selenite) on the oxidative stress and histopathological changes induced by cyanobacterial cells containing microcystins (MCs) in tilapia fish (Oreochromis niloticus). Variation in lipid peroxidation (LPO) levels and carbonyl groups content, reduced glutathione/oxidized glutathione (GSH/GSSG) ratio, and catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR), glutathione peroxidase (GPx) and glutathione S-transferase (GST) activities in liver and kidney of tilapia fish exposed to a single oral dose of 120 microg MC-LR/fish and sacrificed in 24 h, were investigated in the absence and presence of 1.5, 3.0 and 6.0 microg Se/g diet. Results showed a protective role of Se depending on the dose and the biomarker considered. Thus, the lower Se dose made CAT, liver GR and kidney SOD converged to basal values, whereas LPO and liver SOD and GST needed the higher dose. Kidney GR, however, was not protected at any Se dose. Moreover, Se has also shown to have a pro-oxidant effect with increased kidney LPO values and liver and kidney GPx activities in MC-free fish. The microscopic study revealed tissue alterations induced by cyanobacterial cells in the liver, kidney, heart and gastrointestinal tract that were ameliorated by the highest Se dose assayed. The level of Se supplementation must be therefore carefully selected to provide beneficial effects and to avoid potential negative consequences.

Authors+Show Affiliations

Area of Toxicology, Faculty of Pharmacy, University of Seville, Profesor García González n degrees 2, 41012 Seville, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19073206

Citation

Atencio, Loyda, et al. "Effects of Dietary Selenium On the Oxidative Stress and Pathological Changes in Tilapia (Oreochromis Niloticus) Exposed to a Microcystin-producing Cyanobacterial Water Bloom." Toxicon : Official Journal of the International Society On Toxinology, vol. 53, no. 2, 2009, pp. 269-82.
Atencio L, Moreno I, Jos A, et al. Effects of dietary selenium on the oxidative stress and pathological changes in tilapia (Oreochromis niloticus) exposed to a microcystin-producing cyanobacterial water bloom. Toxicon. 2009;53(2):269-82.
Atencio, L., Moreno, I., Jos, A., Prieto, A. I., Moyano, R., Blanco, A., & Cameán, A. M. (2009). Effects of dietary selenium on the oxidative stress and pathological changes in tilapia (Oreochromis niloticus) exposed to a microcystin-producing cyanobacterial water bloom. Toxicon : Official Journal of the International Society On Toxinology, 53(2), 269-82. https://doi.org/10.1016/j.toxicon.2008.11.011
Atencio L, et al. Effects of Dietary Selenium On the Oxidative Stress and Pathological Changes in Tilapia (Oreochromis Niloticus) Exposed to a Microcystin-producing Cyanobacterial Water Bloom. Toxicon. 2009;53(2):269-82. PubMed PMID: 19073206.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of dietary selenium on the oxidative stress and pathological changes in tilapia (Oreochromis niloticus) exposed to a microcystin-producing cyanobacterial water bloom. AU - Atencio,Loyda, AU - Moreno,Isabel, AU - Jos,Angeles, AU - Prieto,Ana I, AU - Moyano,Rosario, AU - Blanco,Alfonso, AU - Cameán,Ana M, Y1 - 2008/12/06/ PY - 2008/07/25/received PY - 2008/11/25/revised PY - 2008/11/26/accepted PY - 2008/12/17/entrez PY - 2008/12/17/pubmed PY - 2009/3/31/medline SP - 269 EP - 82 JF - Toxicon : official journal of the International Society on Toxinology JO - Toxicon VL - 53 IS - 2 N2 - The present study investigates the role of selenium (Se) supplementation (as sodium selenite) on the oxidative stress and histopathological changes induced by cyanobacterial cells containing microcystins (MCs) in tilapia fish (Oreochromis niloticus). Variation in lipid peroxidation (LPO) levels and carbonyl groups content, reduced glutathione/oxidized glutathione (GSH/GSSG) ratio, and catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR), glutathione peroxidase (GPx) and glutathione S-transferase (GST) activities in liver and kidney of tilapia fish exposed to a single oral dose of 120 microg MC-LR/fish and sacrificed in 24 h, were investigated in the absence and presence of 1.5, 3.0 and 6.0 microg Se/g diet. Results showed a protective role of Se depending on the dose and the biomarker considered. Thus, the lower Se dose made CAT, liver GR and kidney SOD converged to basal values, whereas LPO and liver SOD and GST needed the higher dose. Kidney GR, however, was not protected at any Se dose. Moreover, Se has also shown to have a pro-oxidant effect with increased kidney LPO values and liver and kidney GPx activities in MC-free fish. The microscopic study revealed tissue alterations induced by cyanobacterial cells in the liver, kidney, heart and gastrointestinal tract that were ameliorated by the highest Se dose assayed. The level of Se supplementation must be therefore carefully selected to provide beneficial effects and to avoid potential negative consequences. SN - 0041-0101 UR - https://www.unboundmedicine.com/medline/citation/19073206/Effects_of_dietary_selenium_on_the_oxidative_stress_and_pathological_changes_in_tilapia__Oreochromis_niloticus__exposed_to_a_microcystin_producing_cyanobacterial_water_bloom_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0041-0101(08)00602-8 DB - PRIME DP - Unbound Medicine ER -