Effects of dietary arachidonic acid in European sea bass (Dicentrarchus labrax) distal intestine lipid classes and gut health

The use of low fishmeal/fish oil in marine fish diets affects dietary essential fatty acids (EFAs) composition and concentration and, subsequently, may produce a marginal deficiency of those fatty acids with a direct impact on the fish intestinal physiology. Supplementation of essential fatty acids...

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Veröffentlicht in:Fish physiology and biochemistry 2020-04, Vol.46 (2), p.681-697
Hauptverfasser: Rivero-Ramírez, F., Torrecillas, S., Betancor, M. B., Izquierdo, M. S., Caballero, M. J., Montero, D.
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container_start_page 681
container_title Fish physiology and biochemistry
container_volume 46
creator Rivero-Ramírez, F.
Torrecillas, S.
Betancor, M. B.
Izquierdo, M. S.
Caballero, M. J.
Montero, D.
description The use of low fishmeal/fish oil in marine fish diets affects dietary essential fatty acids (EFAs) composition and concentration and, subsequently, may produce a marginal deficiency of those fatty acids with a direct impact on the fish intestinal physiology. Supplementation of essential fatty acids is necessary to cover the requirements of the different EFAs, including the ones belonging to the n-6 series, such as arachidonic acid (ARA). ARA, besides its structural role in the configuration of the lipid classes of the intestine, plays an important role in the functionality of the gut-associated immune tissue (GALT). The present study aimed to test five levels of dietary ARA (ARA0.5 (0.5%), ARA1 (1%), ARA2 (2%), ARA4 (4%), and ARA6 (6%)) for European sea bass ( Dicentrarchus labrax ) juveniles in order to determine (a) its effect in selected distal intestine (DI) lipid classes composition and (b) how these changes affected gut bacterial translocation rates and selected GALT-related gene expression pre and post challenge. No differences were found between distal intestines of fish fed with the graded ARA levels in total neutral lipids and total polar lipids. However, DI of fish fed with the ARA6 diet presented a higher ( P  
doi_str_mv 10.1007/s10695-019-00744-0
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The present study aimed to test five levels of dietary ARA (ARA0.5 (0.5%), ARA1 (1%), ARA2 (2%), ARA4 (4%), and ARA6 (6%)) for European sea bass ( Dicentrarchus labrax ) juveniles in order to determine (a) its effect in selected distal intestine (DI) lipid classes composition and (b) how these changes affected gut bacterial translocation rates and selected GALT-related gene expression pre and post challenge. No differences were found between distal intestines of fish fed with the graded ARA levels in total neutral lipids and total polar lipids. However, DI of fish fed with the ARA6 diet presented a higher ( P  &lt; 0.05) level of phosphatidylethanolamine (PE) and sphingomyelin (SM) than those DI of fish fed with the ARA0.5 diet. In general terms, fatty acid profiles of DI lipid classes mirrored those of the diet dietary. Nevertheless, selective retention of ARA could be observed in glycerophospholipids when dietary levels are low (diet ARA0.5), as reflected in the higher glycerophospholipids-ARA/dietary-ARA ratio for those animals. Increased ARA dietary supplementation was inversely correlated with eicosapentaenoic acid (EPA) content in lipid classes, when data from fish fed with the diets with the same basal composition (diets ARA1 to ARA6). ARA supplementation did not affect intestinal morphometry, goblet cell number, or fish survival, in terms of gut bacterial translocation, along the challenge test. However, after the experimental infection with Vibrio anguillarum , the relative expression of cox-2 and il-1β were upregulated ( P  &lt; 0.05) in DI of fish fed with the diets ARA0.5 and ARA2 compared with fish fed with the rest of the experimental diets. Although dietary ARA did not affect fish survival, it altered the fatty acid composition of glycerophospholipids and the expression of pro-inflammatory genes after infection when included at the lowest concentration, which could be compromising the physical and the immune functionality of the DI, denoting the importance of ARA supplementation when low FO diets are used for marine fish.</description><identifier>ISSN: 0920-1742</identifier><identifier>EISSN: 1573-5168</identifier><identifier>DOI: 10.1007/s10695-019-00744-0</identifier><identifier>PMID: 31845079</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Animal Anatomy ; Animal Biochemistry ; Animal Physiology ; Arachidonic acid ; Biomedical and Life Sciences ; Cell number ; Cell survival ; Cyclooxygenase-2 ; Dicentrarchus labrax ; Diet ; Dietary supplements ; Digestive system ; Eicosapentaenoic acid ; Experimental infection ; Fatty acid composition ; Fatty acids ; Fish ; Fish diets ; Fish meal ; Fish oils ; Fishmeal ; Freshwater &amp; Marine Ecology ; Gastrointestinal tract ; Gene expression ; Gut-associated lymphoid tissues ; Histology ; IL-1β ; Inflammation ; Intestine ; Intestines ; Juveniles ; Levels ; Life Sciences ; Lipids ; Marine fish ; Marine fishes ; Morphology ; Morphometry ; Nutrient deficiency ; Oils &amp; fats ; Phosphatidylethanolamine ; Profiles ; Sea bass ; Sphingomyelin ; Survival ; Translocation ; Waterborne diseases ; Zoology</subject><ispartof>Fish physiology and biochemistry, 2020-04, Vol.46 (2), p.681-697</ispartof><rights>Springer Nature B.V. 2019</rights><rights>Fish Physiology and Biochemistry is a copyright of Springer, (2019). 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B.</creatorcontrib><creatorcontrib>Izquierdo, M. S.</creatorcontrib><creatorcontrib>Caballero, M. J.</creatorcontrib><creatorcontrib>Montero, D.</creatorcontrib><title>Effects of dietary arachidonic acid in European sea bass (Dicentrarchus labrax) distal intestine lipid classes and gut health</title><title>Fish physiology and biochemistry</title><addtitle>Fish Physiol Biochem</addtitle><addtitle>Fish Physiol Biochem</addtitle><description>The use of low fishmeal/fish oil in marine fish diets affects dietary essential fatty acids (EFAs) composition and concentration and, subsequently, may produce a marginal deficiency of those fatty acids with a direct impact on the fish intestinal physiology. Supplementation of essential fatty acids is necessary to cover the requirements of the different EFAs, including the ones belonging to the n-6 series, such as arachidonic acid (ARA). ARA, besides its structural role in the configuration of the lipid classes of the intestine, plays an important role in the functionality of the gut-associated immune tissue (GALT). The present study aimed to test five levels of dietary ARA (ARA0.5 (0.5%), ARA1 (1%), ARA2 (2%), ARA4 (4%), and ARA6 (6%)) for European sea bass ( Dicentrarchus labrax ) juveniles in order to determine (a) its effect in selected distal intestine (DI) lipid classes composition and (b) how these changes affected gut bacterial translocation rates and selected GALT-related gene expression pre and post challenge. No differences were found between distal intestines of fish fed with the graded ARA levels in total neutral lipids and total polar lipids. However, DI of fish fed with the ARA6 diet presented a higher ( P  &lt; 0.05) level of phosphatidylethanolamine (PE) and sphingomyelin (SM) than those DI of fish fed with the ARA0.5 diet. In general terms, fatty acid profiles of DI lipid classes mirrored those of the diet dietary. Nevertheless, selective retention of ARA could be observed in glycerophospholipids when dietary levels are low (diet ARA0.5), as reflected in the higher glycerophospholipids-ARA/dietary-ARA ratio for those animals. Increased ARA dietary supplementation was inversely correlated with eicosapentaenoic acid (EPA) content in lipid classes, when data from fish fed with the diets with the same basal composition (diets ARA1 to ARA6). ARA supplementation did not affect intestinal morphometry, goblet cell number, or fish survival, in terms of gut bacterial translocation, along the challenge test. However, after the experimental infection with Vibrio anguillarum , the relative expression of cox-2 and il-1β were upregulated ( P  &lt; 0.05) in DI of fish fed with the diets ARA0.5 and ARA2 compared with fish fed with the rest of the experimental diets. Although dietary ARA did not affect fish survival, it altered the fatty acid composition of glycerophospholipids and the expression of pro-inflammatory genes after infection when included at the lowest concentration, which could be compromising the physical and the immune functionality of the DI, denoting the importance of ARA supplementation when low FO diets are used for marine fish.</description><subject>Animal Anatomy</subject><subject>Animal Biochemistry</subject><subject>Animal Physiology</subject><subject>Arachidonic acid</subject><subject>Biomedical and Life Sciences</subject><subject>Cell number</subject><subject>Cell survival</subject><subject>Cyclooxygenase-2</subject><subject>Dicentrarchus labrax</subject><subject>Diet</subject><subject>Dietary supplements</subject><subject>Digestive system</subject><subject>Eicosapentaenoic acid</subject><subject>Experimental infection</subject><subject>Fatty acid composition</subject><subject>Fatty acids</subject><subject>Fish</subject><subject>Fish diets</subject><subject>Fish meal</subject><subject>Fish oils</subject><subject>Fishmeal</subject><subject>Freshwater &amp; Marine Ecology</subject><subject>Gastrointestinal tract</subject><subject>Gene expression</subject><subject>Gut-associated lymphoid tissues</subject><subject>Histology</subject><subject>IL-1β</subject><subject>Inflammation</subject><subject>Intestine</subject><subject>Intestines</subject><subject>Juveniles</subject><subject>Levels</subject><subject>Life Sciences</subject><subject>Lipids</subject><subject>Marine fish</subject><subject>Marine fishes</subject><subject>Morphology</subject><subject>Morphometry</subject><subject>Nutrient deficiency</subject><subject>Oils &amp; fats</subject><subject>Phosphatidylethanolamine</subject><subject>Profiles</subject><subject>Sea bass</subject><subject>Sphingomyelin</subject><subject>Survival</subject><subject>Translocation</subject><subject>Waterborne diseases</subject><subject>Zoology</subject><issn>0920-1742</issn><issn>1573-5168</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kU1vFSEUhomxsdfqH3BhSNzUxdQDw8ewNPX6kTTppq4Jwxx6aeYyV2ASu_C_S71VExeuCOF5n3PCS8grBhcMQL8rDJSRHTDTtasQHTwhGyZ130mmhqdkA4ZDx7Tgp-R5KXcAYLRiz8hpzwYhQZsN-bENAX0tdAl0ilhdvqcuO7-L05Kip87HicZEt2teDugSLejo6Eqh5x-ix1Szy363Fjq7Mbvvb5ukVDe3SMVSY0I6x0NT-LllsFCXJnq7VrpDN9fdC3IS3Fzw5eN5Rr5-3N5cfu6urj99uXx_1XnBTO1QwwRmwsk5aYzQQzBejCOoPkghgxjCyDUoUEoonBTr0cDARsU5Z0F67M_I-dF7yMu3tS1m97F4nGeXcFmL5T3Xpo0CaOibf9C7Zc2pbdcozZhRQstG8SPl81JKxmAPOe7b51kG9qEceyzHtnLsr3Lsg_r1o3od9zj9ifxuowH9ESjtKd1i_jv7P9qffhaaIg</recordid><startdate>20200401</startdate><enddate>20200401</enddate><creator>Rivero-Ramírez, F.</creator><creator>Torrecillas, S.</creator><creator>Betancor, M. 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Supplementation of essential fatty acids is necessary to cover the requirements of the different EFAs, including the ones belonging to the n-6 series, such as arachidonic acid (ARA). ARA, besides its structural role in the configuration of the lipid classes of the intestine, plays an important role in the functionality of the gut-associated immune tissue (GALT). The present study aimed to test five levels of dietary ARA (ARA0.5 (0.5%), ARA1 (1%), ARA2 (2%), ARA4 (4%), and ARA6 (6%)) for European sea bass ( Dicentrarchus labrax ) juveniles in order to determine (a) its effect in selected distal intestine (DI) lipid classes composition and (b) how these changes affected gut bacterial translocation rates and selected GALT-related gene expression pre and post challenge. No differences were found between distal intestines of fish fed with the graded ARA levels in total neutral lipids and total polar lipids. However, DI of fish fed with the ARA6 diet presented a higher ( P  &lt; 0.05) level of phosphatidylethanolamine (PE) and sphingomyelin (SM) than those DI of fish fed with the ARA0.5 diet. In general terms, fatty acid profiles of DI lipid classes mirrored those of the diet dietary. Nevertheless, selective retention of ARA could be observed in glycerophospholipids when dietary levels are low (diet ARA0.5), as reflected in the higher glycerophospholipids-ARA/dietary-ARA ratio for those animals. Increased ARA dietary supplementation was inversely correlated with eicosapentaenoic acid (EPA) content in lipid classes, when data from fish fed with the diets with the same basal composition (diets ARA1 to ARA6). ARA supplementation did not affect intestinal morphometry, goblet cell number, or fish survival, in terms of gut bacterial translocation, along the challenge test. However, after the experimental infection with Vibrio anguillarum , the relative expression of cox-2 and il-1β were upregulated ( P  &lt; 0.05) in DI of fish fed with the diets ARA0.5 and ARA2 compared with fish fed with the rest of the experimental diets. Although dietary ARA did not affect fish survival, it altered the fatty acid composition of glycerophospholipids and the expression of pro-inflammatory genes after infection when included at the lowest concentration, which could be compromising the physical and the immune functionality of the DI, denoting the importance of ARA supplementation when low FO diets are used for marine fish.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><pmid>31845079</pmid><doi>10.1007/s10695-019-00744-0</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-4358-2157</orcidid><oa>free_for_read</oa></addata></record>
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ispartof Fish physiology and biochemistry, 2020-04, Vol.46 (2), p.681-697
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subjects Animal Anatomy
Animal Biochemistry
Animal Physiology
Arachidonic acid
Biomedical and Life Sciences
Cell number
Cell survival
Cyclooxygenase-2
Dicentrarchus labrax
Diet
Dietary supplements
Digestive system
Eicosapentaenoic acid
Experimental infection
Fatty acid composition
Fatty acids
Fish
Fish diets
Fish meal
Fish oils
Fishmeal
Freshwater & Marine Ecology
Gastrointestinal tract
Gene expression
Gut-associated lymphoid tissues
Histology
IL-1β
Inflammation
Intestine
Intestines
Juveniles
Levels
Life Sciences
Lipids
Marine fish
Marine fishes
Morphology
Morphometry
Nutrient deficiency
Oils & fats
Phosphatidylethanolamine
Profiles
Sea bass
Sphingomyelin
Survival
Translocation
Waterborne diseases
Zoology
title Effects of dietary arachidonic acid in European sea bass (Dicentrarchus labrax) distal intestine lipid classes and gut health
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