Saito Hiroaki, Marty Yanic
National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fuku-ura, Kanazawa-ku, Yokohama 236-8648, Japan.
J Oleo Sci. 2010;59(6):281-92. doi: 10.5650/jos.59.281.
The lipid and fatty acids of the Pacific oyster, Crassostrea gigas, collected both in Japan and France, were analyzed. Triacylglycerols and sterols were the major classes in the neutral lipids of both populations of C. gigas between the two countries, and they had significant levels of phospholipids (phosphatidylethanolamine and phosphatidylcholine) with ceramideaminoethylphosphonate in their polar tissue lipids. The differences of 18:3n-3 and 22:6n-3 (docosahexaenoic acid; DHA) levels in the depot triacylglycerols suggest the influence of dietary phytoplankton in different environments of the two countries. Although the levels of the fatty acids slightly differed, that of 20:5n-3 (icosapentaenoic acid; EPA, 20.5-24.8%) in the triacylglycerols was specifically the highest fatty acid in all the samples. The major polyunsaturated fatty acids in the polar lipids of all samples were EPA (13.2-17.8% for phosphatidylethanolamine and 13.4-22.7% for phosphatidylcholine) and DHA (18.9-26.8% for phosphatidylethanolamine and 13.1-22.5% for phosphatidylcholine). The fluctuation of total PUFA levels in the polar lipids between samples of both countries suggests the influence of diet. In addition, the consistently high EPA levels in the phospholipids may compensate for the variation in DHA levels.
对采集于日本和法国的太平洋牡蛎（Crassostrea gigas）的脂质和脂肪酸进行了分析。三酰甘油和甾醇是这两个国家的太平洋牡蛎种群中性脂质中的主要类别，并且它们的极性组织脂质中含有显著水平的磷脂（磷脂酰乙醇胺和磷脂酰胆碱）以及神经酰胺氨基乙基膦酸酯。储存三酰甘油中18:3n-3和22:6n-3（二十二碳六烯酸；DHA）水平的差异表明两国不同环境中浮游植物性食物的影响。尽管脂肪酸水平略有不同，但三酰甘油中20:5n-3（二十碳五烯酸；EPA，20.5 - 24.8%）的含量在所有样本中均为最高的脂肪酸。所有样本极性脂质中的主要多不饱和脂肪酸为EPA（磷脂酰乙醇胺中为13.2 - 17.8%，磷脂酰胆碱中为13.4 - 22.7%）和DHA（磷脂酰乙醇胺中为18.9 - 26.8%，磷脂酰胆碱中为13.1 - 22.5%）。两国样本间极性脂质中总多不饱和脂肪酸水平的波动表明饮食的影响。此外，磷脂中始终较高的EPA水平可能弥补了DHA水平的变化。
