The relative incorporation of arachidonic and eicosapentaenoic acids into human platelet phospholipids.

Abstract:

:The incorporation of arachidonic acid (AA) as compared to eicosapentaenoic acid (EPA) into human platelet phospholipids was tested by incubating washed platelets with a known mixture of [3H]AA and [14C]EPA. Following incubation, the platelet lipids were extracted, the individual phospholipids--phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylinositol (PI) and phosphatidylethanolamine (PE)- were separated by thin layer chromatography, and their corresponding [3H]/[14C] ratios were determined. Based on a [3H]/[14C] ratio of unity for the substrate mixture, the PC, PS, PI and PE exhibited ratios of 0.55, 0.93, 1.12 and 0.74, respectively, which were significantly different from 1.00 in all instances except in the case of PS. These results indicate that PC and PE selectively incorporated EPA, while PI showed preference toward AA. These selectivities may account partly for the differing AA/EPA mass ratios that have been observed among the individual phospholipids of human subjects consuming fish oils.

journal_name

Lipids

journal_title

Lipids

authors

Weaver BJ,Holub BJ

doi

10.1007/BF02534401

subject

Has Abstract

pub_date

1985-11-01 00:00:00

pages

773-7

issue

11

eissn

0024-4201

issn

1558-9307

journal_volume

20

pub_type

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