Positional Distribution of Fatty Acids in Triacylglycerols and Phospholipids from Fillets of Atlantic Salmon (Salmo Salar) Fed Vegetable and Fish Oil Blends.
Positional Distribution of Fatty Acids in Triacylglycerols and Phospholipids from Fillets of Atlantic Salmon (Salmo Salar) Fed Vegetable and Fish Oil Blends.
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DOI：
10.3390/md13074255
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发表时间：
2015-07-10
期刊：
影响因子：
5.4
通讯作者：
Menoyo D
中科院分区：
文献类型：
--
作者：
Ruiz-Lopez N;Stubhaug I;Ipharraguerre I;Rimbach G;Menoyo D
膳食脂肪的营养和功能特性与脂肪酸（FA）组成及其在三酰甘油（TAG）组分中的位置分布有关。大西洋鲑鱼是健康的长链欧米茄3脂肪酸（特别是二十碳五烯酸（EPA）和二十二碳六烯酸（DHA））的重要来源。然而，鲑鱼饲料中的脂质来源对FA在鱼TAG中的区域特异性的影响仍有待探讨。本研究确定了饲喂鲑鱼与棕榈，油菜籽和鱼油的混合物的效果，提供了两种不同的EPA + DHA浓度（高：H-ED 10.3%和低：L-ED 4.6%）对鱼片脂质类组成和FA在TAG和磷脂中的位置分布。鱼片TAG的区域特异性分析表明，大约50%的EPA和大约80%的DHA位于sn-2位置。FA在磷脂酰胆碱（PC）中的位置分布表明，约80%的EPA和约90%的DHA位于sn-2中。喂食富含蔬菜的饲料的鱼在PC的sn-2位显示出更高的EPA（H-ED和L-ED饲料中分别为77%和83%），但DHA浓度相似。它的结论是，喂养鲑鱼与不同的EPA + DHA浓度不影响他们的位置分布在鱼片TAG。
The nutritional and functional characteristics of dietary fat are related to the fatty acid (FA) composition and its positional distribution in the triacylglycerol (TAG) fraction. Atlantic salmon is an important source of healthy long chain omega 3 FA (particularly, eicosapentaenoic (EPA) and docoxahexaenoic (DHA) acids). However, the impact of lipid sources in salmon feeds on the regiospecificity of FA in the fish TAG remains to be explored. The present study determines the effect of feeding salmon with blends of palm, rapeseed, and fish oil, providing two different EPA + DHA concentrations (high: H-ED 10.3% and low: L-ED 4.6%) on the fillet lipid class composition and the positional distribution of FA in TAG and phospholipids. The regiospecific analysis of fillet TAG showed that around 50% of the EPA and around 80% of DHA was located in the sn-2 position. The positional distribution of FA in phosphatidylcholine (PC), showed that around 80% of the EPA and around 90% of DHA were located in the sn-2. Fish fed the vegetable-rich diets showed higher EPA in the sn-2 position in PC (77% vs. 83% in the H-ED and L-ED diets, respectively) but similar DHA concentrations. It is concluded that feeding salmon with different EPA + DHA concentrations does not affect their positional distribution in the fillet TAG.