Tocopherol in silver catfish diets reduces oxidative stress and improves the unsaturated fatty acid profile

Abstract

Growth, biochemical and haematological parameters, and oxidative biomarkers were evaluated in juveniles of silver catfish (Rhamdia quelen). Fish were fed with tocopherol (0, 200, 300 and 400 mg kg−1) during an experimental period of 60 days. Growth parameters of the silver catfish showed no changes with the addition of tocopherol in diets. Tocopherol favoured the deposition of polyunsaturated fatty acids in muscle tissue, changed the erythrocyte count and increased resistance of the erythrocytes. The inclusion of tocopherol at 300 mg kg−1 in diets reduced oxidative stress in the brain, gills, liver and kidney. The addition of this compound improved the stability of biological membranes. The antioxidant protection exerted by tocopherol decreased ROS activity, and increased deposition of unsaturated fatty acids and oxidative stability, indicating favourable fish health. Silver catfish that ingested tocopherol in the diet obtained a higher body deposition of polyunsaturated fatty acids. Results of the present study recommend inclusion of tocopherol at 300 mg kg−1 and higher in silver catfish diets.

In vivo evidence of sea buckthorn relieving oxidative stress and improving immune performance of common carp (Cyprinus carpio L.)

“…15 The addition of 300 mg kg −1 tocopherol in diet decreased the ROS content in muscle and increased the deposition and oxidation stability of unsaturated fatty acids. 16 In our previous studies, we found the supplementation of soybean isoflavones in diets increased the gene expression level of fatty acid transport proteins (fatp) in the muscle of common carp. 17 Dietary supplementation of 25 and 50 mg kg −1 soy isoflavones promoted muscle n-3 PUFA deposition in common carp.…”

“…Adding daidzein to the diet significantly improved the antioxidant capacity of juvenile turbot ( Scophthalmus maximus L.) by increasing the activity of serum superoxide dismutase and glutathione peroxidase 15 . The addition of 300 mg kg −1 tocopherol in diet decreased the ROS content in muscle and increased the deposition and oxidation stability of unsaturated fatty acids 16 . In our previous studies, we found the supplementation of soybean isoflavones in diets increased the gene expression level of fatty acid transport proteins ( fatp ) in the muscle of common carp 17 .…”

Exigências nutricionais para bagres nativos do Brasil: uma revisão

“…Em se tratando de fontes vitamínicas, trabalhos com o uso de vitamina C (Borba et al, 2007), vitamina E (Uczay et al, 2021) e vitamina A (Battisti et al, 2017) também foram avaliados. Neles, doses entre 0 a 1233 mg/kg de vitamina C não afetaram o desempenho (Borba et al, 2007), bem como, a utilização de 300 mg/kg de vitamina E favoreceu a deposição de ácidos graxos insaturados e melhorou o metabolismo oxidativo dessa espécie (Uczay et al, 2021). A vitamina em níveis de 2610 UI/kg, por sua vez, apresentou melhores resultados de desempenho e menor estresse oxidativo (Battisti et al, 2017).…”