Impairment on fillet fatty acid profile and oxidative damage in pirarucu, Arapaima gigas, acutely exposed to extreme ambient temperature.

Autor: Siqueira CS; Graduation in Biomedicine, Universidade Franciscana (UFN), Santa Maria, RS, Brazil., Ribeiro SR; Department of Food Science and Technology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil., Milarch CF; Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil; Faculdade Ielusc - R. Mafra, 84 - Saguaçu, Joinville - SC, 89221-665. Brazil., Wagner R; Department of Food Science and Technology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil., Baldisserotto B; Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil., Val AL; LEEM-Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Research of the Amazon, Manaus, Amazonas, Brazil., Baldissera MD; Laboratory of Bioprospecting and Experimental Biology, Universidade Franciscana (UFN), Santa Maria, RS, Brazil. Electronic address: matheus.dellamea@ufn.edu.br.
Jazyk: angličtina
Zdroj: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology [Comp Biochem Physiol A Mol Integr Physiol] 2024 Jul; Vol. 293, pp. 111625. Date of Electronic Publication: 2024 Mar 19.
DOI: 10.1016/j.cbpa.2024.111625
Abstrakt: Climatic events are affecting the Amazon basin and according to projections it is predicted the intensification of climate changes through increases in temperature and carbon dioxide (CO 2 ). Recent evidence has revealed that exposure to an extreme climate scenario elicits oxidative damage in some fish species, impairing their metabolism and physiology, contributing to their susceptibility. Thus, the comprehension of physiological alterations in Arapaima gigas (pirarucu) to the climatic changes forecasted for the next 100 years is important to evaluate its capability to deal with oxidative stress. The objective of this work was to determine whether antioxidant defense system is able to prevent muscle oxidative damage of pirarucu exposed 96 h to extreme climate scenario, as well as the effects of this exposition on muscle fatty acid levels. Lipid peroxidation and reactive oxygen species significantly increase in the muscle of pirarucus exposed to an extreme climate scenario compared to control, while muscle superoxide dismutase, catalase, and glutathione peroxidase were significantly lower. Total amount of saturated fatty acids (SFAs) was significantly higher in pirarucu exposed to an extreme climate scenario compared to control, while total content of monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) was significantly lower. Exposure to an extreme climate scenario causes muscular oxidative stress and that the antioxidant systems are inefficient to avoid oxidative damage. In addition, the increase of total SFAs and the decrease of MUFAs and PUFAs probably intend to maintain membrane fluidity while facing high temperature and CO 2 levels.
Competing Interests: Declaration of competing interest No potential conflict of interest was reported by the authors.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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