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547.913The lipid composition of four tissues, musculo-cutaneous, blood, internal organs, and gonads, from the marine worm Urechis unicinctus was studied. It was shown that the principal phospholipids (PL) in the studied tissues were phosphatidylcholine (PC) and phosphatidylethanolamine (PE). Depending on the tissue type, the fraction of PE,). Blood contained a high percentage of lyso-PE (20.8%). The fatty-acid (FA) composition of the tissues consisted of C16, C18, C20, and C22 families with different degrees of unsaturation. Eicosapentaenoic acid (20:5) had the highest percentage in all tissues at 15.5-26.1%. Tissues with different functions such as musculo-cutaneous and gonads contained the same amounts of 20:5 FA, 26.1% (of total FA). The high content of polyunsaturated FA and, in particular, eicosapentaenoic FA in U. unicinctus confirmed that it was valuable as not only an energy source but also a source of PL and essential FA.Worms are some of the least studied among the large variety of marine organisms. Marine worms are an important link in the food chain. For example, Urechis unicinctus is a staple of aboriginal people of the Far East and a food source for commercial fish. The goal of our study was to determine the composition and content of lipids from tissues of U. unicinctus such as musculo-cutaneous (MC), blood, internal organs, and gonads.Total lipids in these tissues of the marine worm (MW) were 5.9, 14.8, 34.9, and 37.4% (per dry tissue weight), respectively. Analysis of the neutral lipids (NL) showed that triacylglycerols and cholesterol were the main ones in all studied tissues. Pigments and glycerin alkyl esters were also present. In addition, internal organs and blood contained fatty acid methyl esters (FAME); MC and blood, traces of 1,3-diacylglycerols. According to TLC, blood had the greatest variety of NL. Isay et al. determined earlier the content in worms, including U. unicinctus, of D-glyceryl ethers (D-GE), derivatives of glycerin with an ether bond [1]. An analysis of six MW species showed that the D-GE content in them varied in the range 1.9-4.0% (in the lipid extract); the D-GE content in U. unicinctus, 2.2%. Marsden obtained data indicating that not all four studied species of tropical MW contained GE (TLC data) [2]. Table 1 presents the composition and content of PL from the tissues. The main ones were phosphatidylcholine (PC) and phosphatidylethanolamine (PE). This agreed with the literature data [3]. The PL content in three species of MW was reported [4]. The PL fraction in the lipid extract varied markedly from species to species (21.2-51.0%). Phosphatidylglycerin (PG) was detected in U. unicinctus tissues studied by us only in traces in blood. Sphingomyelin (SM) was found in three tissues and was absent in blood. As it turned out, the fraction of lyso-PE was significant in blood, up to 21%, whereas lyso-PC was found only in gonads and MC in insignificant (<1%) quantities. The disparity in the literature data on the composition of particular PL and their content is a function of ...
547.913The lipid composition of four tissues, musculo-cutaneous, blood, internal organs, and gonads, from the marine worm Urechis unicinctus was studied. It was shown that the principal phospholipids (PL) in the studied tissues were phosphatidylcholine (PC) and phosphatidylethanolamine (PE). Depending on the tissue type, the fraction of PE,). Blood contained a high percentage of lyso-PE (20.8%). The fatty-acid (FA) composition of the tissues consisted of C16, C18, C20, and C22 families with different degrees of unsaturation. Eicosapentaenoic acid (20:5) had the highest percentage in all tissues at 15.5-26.1%. Tissues with different functions such as musculo-cutaneous and gonads contained the same amounts of 20:5 FA, 26.1% (of total FA). The high content of polyunsaturated FA and, in particular, eicosapentaenoic FA in U. unicinctus confirmed that it was valuable as not only an energy source but also a source of PL and essential FA.Worms are some of the least studied among the large variety of marine organisms. Marine worms are an important link in the food chain. For example, Urechis unicinctus is a staple of aboriginal people of the Far East and a food source for commercial fish. The goal of our study was to determine the composition and content of lipids from tissues of U. unicinctus such as musculo-cutaneous (MC), blood, internal organs, and gonads.Total lipids in these tissues of the marine worm (MW) were 5.9, 14.8, 34.9, and 37.4% (per dry tissue weight), respectively. Analysis of the neutral lipids (NL) showed that triacylglycerols and cholesterol were the main ones in all studied tissues. Pigments and glycerin alkyl esters were also present. In addition, internal organs and blood contained fatty acid methyl esters (FAME); MC and blood, traces of 1,3-diacylglycerols. According to TLC, blood had the greatest variety of NL. Isay et al. determined earlier the content in worms, including U. unicinctus, of D-glyceryl ethers (D-GE), derivatives of glycerin with an ether bond [1]. An analysis of six MW species showed that the D-GE content in them varied in the range 1.9-4.0% (in the lipid extract); the D-GE content in U. unicinctus, 2.2%. Marsden obtained data indicating that not all four studied species of tropical MW contained GE (TLC data) [2]. Table 1 presents the composition and content of PL from the tissues. The main ones were phosphatidylcholine (PC) and phosphatidylethanolamine (PE). This agreed with the literature data [3]. The PL content in three species of MW was reported [4]. The PL fraction in the lipid extract varied markedly from species to species (21.2-51.0%). Phosphatidylglycerin (PG) was detected in U. unicinctus tissues studied by us only in traces in blood. Sphingomyelin (SM) was found in three tissues and was absent in blood. As it turned out, the fraction of lyso-PE was significant in blood, up to 21%, whereas lyso-PC was found only in gonads and MC in insignificant (<1%) quantities. The disparity in the literature data on the composition of particular PL and their content is a function of ...
The neutrophil/lymphocyte ratio predicts all-cause of mortality in geriatric patients with chronic kidney disease.
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