Dietary carbohydrate and lipid sources affect differently the oxidative status of European sea bass (Dicentrarchus labrax) juveniles

• Published in: British Journal of Nutrition
• Main Authors: Castro, Carolina, Perez-Jimenez, Amalia, Coutinho, Filipe, Diaz-Rosales, Patricia, Serra, Claudia Alexandra dos Reis, Panserat, Stéphane, Corraze, Geneviève, Peres, Helena, Oliva-Teles, Aires
• Other Authors: Department of Biology, Faculty of Sciences, University Autonoma of Madrid, Centro Interdisciplinar de Investigaçao Marinha e Ambiental (CIIMA), Nutrition, Aquaculture et Génomique (NUAGE), Institut National de la Recherche Agronomique (INRA)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), FCT (Foundation for Science and Technology), Portugal PTDC/MAR-BIO/4107/2012, European Regional Development Fund (ERDF) through the COMPETE - Operational Competitiveness Programme, national funds through FCT PEst-C/MAR/LA0015/2011, FCT SFRH/BD/76297/2011 SFRH/BPD/64684/2009 SFRH/BD/86799/2012, NORTE-07-0124-FEDER-000038-BPD-2013-07, NORTE-07-0124-FEDER-000038-BPD-2013-05
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: Antioxidant enzymes; Feedstuffs; Lipid oxidative damage; Carbohydrates; Vegetable oils; FATTY-ACID-COMPOSITION; BREAM SPARUS-AURATA; TROUT ONCORHYNCHUS-MYKISS; SALMON SALMO-SALAR; NONSPECIFIC IMMUNE-RESPONSES; FISH-MEAL REPLACEMENT; COD GADUS-MORHUA; ATLANTIC SALMON; RAINBOW-TROUT; VEGETABLE-OILS; [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition; Atlantic salmon; Gadus morhua; Salmo salar
• Online Access: https://hal.science/hal-01901428; https://doi.org/10.1017/S0007114515003360

This study aimed to evaluate the effects of dietary lipid source and carbohydrate content on the oxidative status of European sea bass (Dicentrarchus labrax) juveniles. For that purpose, four diets were formulated with fish oil (FO) and vegetable oils (VO) as the lipid source and with 20 or 0 % gelatinised starch as the carbohydrate source, in a 2 x 2 factorial design. Liver and intestine antioxidant enzyme activities (catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPX), glutathione reductase (GR), glucose-6-phosphate dehydrogenase (G6PD)), hepatic and intestinal lipid peroxidation (LPO), as well as hepatic oxidative stress index (OSI), were measured in fish fed the experimental diets for 73 d (n 9 fish/diet). Carbohydrate-rich diets promoted a decrease in hepatic LPO and OSI, whereas the lipid source induced no changes. Inversely, dietary lipid source, but not dietary carbohydrate concentration, affected LPO in the intestine. Lower intestinal LPO was observed in VO groups. Enzymes responsive to dietary treatments were GR, G6PD and CAT in the liver and GR and GPX in the intestine. Dietary carbohydrate induced GR and G6PD activities and depressed CAT activity in the liver. GPX and GR activities were increased in the intestine of fish fed VO diets. Overall, effects of diet composition on oxidative status were tissue-related: the liver and intestine were strongly responsive to dietary carbohydrates and lipid sources, respectively. Furthermore, different metabolic routes were more active to deal with the oxidative stress in the two organs studied.