Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/32644
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Influence of Dietary Lipids and Environmental Salinity on the n-3 Long-Chain Polyunsaturated Fatty Acids Biosynthesis Capacity of the Marine Teleost Solea senegalensis
Author(s): Marrero, Manuel
Monroig, Óscar
Betancor, Monica
Herrera, Marcelino
Pérez, Jose A
Garrido, Diego
Galindo, Ana
Giráldez, Inmaculada
Rodríguez, Covadonga
Keywords: Solea senegalensis
Fads2
Elovl5
LC-PUFA biosynthesis
diet
salinity
EPA
DHA
Issue Date: May-2021
Date Deposited: 26-May-2021
Citation: Marrero M, Monroig Ó, Betancor M, Herrera M, Pérez JA, Garrido D, Galindo A, Giráldez I & Rodríguez C (2021) Influence of Dietary Lipids and Environmental Salinity on the n-3 Long-Chain Polyunsaturated Fatty Acids Biosynthesis Capacity of the Marine Teleost Solea senegalensis. Marine Drugs, 19 (5), Art. No.: 254. https://doi.org/10.3390/md19050254
Abstract: Fish vary in their ability to biosynthesise long-chain polyunsaturated fatty acids (LC-PUFA) depending upon the complement and function of key enzymes commonly known as fatty acyl desaturases and elongases. It has been reported in Solea senegalensis the existence of a Δ4 desaturase, enabling the biosynthesis of docosahexaenoic acid (DHA) from eicosapentaenoic acid (EPA), which can be modulated by the diet. The present study aims to evaluate the combined effects of the partial replacement of fish oil (FO) with vegetable oils and reduced environmental salinity in the fatty acid composition of relevant body compartments (muscle, hepatocytes and enterocytes), the enzymatic activity over α-linolenic acid (ALA) to form n-3 LC-PUFA through the incubation of isolated hepatocytes and enterocytes with [1-14C] 18:3 n-3, and the regulation of the S. senegalensis fads2 and elovl5 in the liver and intestine. The presence of radiolabelled products, including 18:4n-3, 20:4n-3 and EPA, provided compelling evidence that a complete pathway enabling the biosynthesis of EPA from ALA, establishing S. senegalensis, has at least one Fads2 with ∆6 activity. Dietary composition prevailed over salinity in regulating the expression of fads2, while salinity did so over dietary composition for elovl5. FO replacement enhanced the proportion of DHA in S. senegalensis muscle and the combination with 20 ppt salinity increased the amount of n-3 LC-PUFA in hepatocytes.
DOI Link: 10.3390/md19050254
Rights: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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