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Incorporation of fatty acids of marine origin into triglycerides and phospholipids of mammals

Incorporation of fatty acids of marine origin into triglycerides and phospholipids of mammals

Biochimica et Biophysica Acta 144(3): 541-548

Rats and mink were kept on a diet of mackerel, and the distribution of fatty acids over the different positions of triglycerides and phospholipids was analyzed. In the triglycerides of depot fat the monoenoic acids 201 and 22:1 accumulate in Positions I and 3 [1,2, and 3 refer to 1,2,3-triacyl-L-glycerol], and the polyenoic acids in Position 3, in a pattern similar to that of marine mammals. The triglycerides of the livers incorporate less monoenoic acid than the depot fats. In the phosphatidyl-choline and phosphatidyl-ethanolamine of the livers (mink and rat) and of the adipose tissue (rat) the acids 20:5 and 22:6 are incorporated into the [beta]-position, replacing linoleic and arachidonic acid. The fatty acid composition in the a-position remains essentially unchanged. There is little incorporation of 20:1 and no noticeable accumulation of 14:0, 16:1, 18:4 and 22:1 in the phospholipids. The mari fatty acids can be accepted by depot fat for the purpose of energy storage, but that they do not serve other structural or metabolic purposes, with the exception of the long-chain polyenoic acids, especially 22:6.

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Accession: 014517486

Download citation: RISBibTeXText

PMID: 5624811

DOI: 10.1016/0005-2760(67)90043-4

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