Comparative Study on the Fatty Acid Composition of Lipids in Thoracic Duct Lymph, Serum and Diet of the Rat and Rabbit
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Comparative study was carried out on the fatty acid composition of the lipids of thoracic duct lymph, aortic blood serum and diet of the rat and rabbit. Analysis of the fatty acid was made by gas-liquid chromatography. Major acids in lymph and serum of rats were palmitic, stearic, oleic, linoleic and arachidonic acids. In rabbits, the arachidonic acid level was, however, very low both in lymph and serum. On the other hand, a great quantity of linolenic acid was contained in both lymph and serum of rabbits in contrast to rats. Particularly interesting was the presence of fatty acids with 15 and 17 carbon atoms in lymph and serum of all examined rats and rabbits whereas the percentage composition of these acids was very low. Small amounts of lauric, myristic and palmitoleic acids were also present in lymph and serum of both animals. In addition to this, there was a possility of appearance of 13:1 or branched 14 :0, 14:1, 15:1 or branched 16:0, 16:2 or branched 18 :0, 20:1 and 20:3 acids. An unknown acid which followed arachidonic acid was noted in lymph and serum of rats while the nature of this acid has not yet been determined. Major fatty acids found in lymph were all observed in diet. The same odd carbon fatty acids in lymph was also identified in diet. The percentages of most of the components in lymph run roughly parallel to those in diet in each animal. The stearic and arachidonic acids were, however, the exceptions in rats. The level of stearic and arachidonic acids was greatly higher in lymph and serum than in diet. In rabbits, stearic acid showed the same relationship as in rats, but arachidonic acid was contained in a small quantity both in lymph and diet. The linoleic acid was the largest component in lymph and diet of both animals. A great difference in the percentage composition of linolenic acid in lymph and serum between the rat and rabbit might be obtained from the difference of the content of this acid in diets.
- 社団法人 日本循環器学会の論文
社団法人 日本循環器学会 | 論文
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