Dietary supplementation with increasing doses of an organic micromineral complex on juvenile Nile tilapia: Effects on the antioxidant defense system and tissue deposition.

Autor: da Silva Pierri B; Aquaculture Department, Agrarian Sciences Center, Federal University of Santa Catarina (UFSC), Rodovia Admar Gonzaga, 1346, CEP 88034-000 Florianópolis, SC, Brazil., Dafré AL; Biochemistry Department, Biological Sciences Center, UFSC, Florianópolis, SC, Brazil., Silva AD; Aquaculture Department, Agrarian Sciences Center, Federal University of Santa Catarina (UFSC), Rodovia Admar Gonzaga, 1346, CEP 88034-000 Florianópolis, SC, Brazil., Cadorin DI; Aquaculture Department, Agrarian Sciences Center, Federal University of Santa Catarina (UFSC), Rodovia Admar Gonzaga, 1346, CEP 88034-000 Florianópolis, SC, Brazil., Mattos JJ; Biochemistry Department, Biological Sciences Center, UFSC, Florianópolis, SC, Brazil., Bascunãn VLAF; Chemistry Department, Center for Physical and Mathematical Sciences, UFSC, Florianópolis, SC, Brazil., Pettigrew JE; Pettigrew Research Services, Inc., Tubac, AZ, USA., Fracalossi DM; Aquaculture Department, Agrarian Sciences Center, Federal University of Santa Catarina (UFSC), Rodovia Admar Gonzaga, 1346, CEP 88034-000 Florianópolis, SC, Brazil. Electronic address: debora.fracalossi@ufsc.br.
Jazyk: angličtina
Zdroj: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology [Comp Biochem Physiol A Mol Integr Physiol] 2021 Oct; Vol. 260, pp. 111039. Date of Electronic Publication: 2021 Jul 17.
DOI: 10.1016/j.cbpa.2021.111039
Abstrakt: The effect of increasing amounts (0%, 25%, 50%, 75%, and 100%) of dietary supplementation with an organic micromineral complex (Fe, Zn, Cu, Mn, and Se) on antioxidant defenses and mineral deposition in tissues of Nile tilapia juveniles was evaluated, where 100% supplementation represented the average adopted by the feed industry in Brazil. Fish (initial weight 23.93 ± 0.80 g) were fed until apparent satiation twice a day for 56 days. The maximum deposition of Fe and Zn in the hepatopancreas occurred in fish given approximately 50% supplementation, whereas the deposition of Mn and Se increased linearly with the inclusion of the complex. The activity of catalase and superoxide dismutase in the hepatopancreas decreased in fish fed the 50% dose, when compared to those not receiving mineral supplementation or those receiving higher doses. Glutathione peroxidase (GPx) activity in the hepatopancreas increased as the dietary Se concentration increased. However, the concentration of metallothionein in the hepatopancreas showed an inverse relationship to the increase in dietary supplementation of the organic mineral complex. There was no relationship between the doses of organic micromineral supplementation and the activities of GPx, reduced glutathione, non-protein thiols, or protein carbonylation. However, diets supplemented with 50% to 100% promoted greater GPx activity when compared to the 0% supplemented diet. Supplementation with intermediate doses of organic microminerals, approximately 50% of that used in commercial tilapia diets, promoted the homeostasis of metal metabolism, especially for Fe and Zn.
(Copyright © 2021 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: