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Effect of essential fatty acid deficiency on the size and distribution of rat plasma HDL
Author(s) -
Lowe K. E.,
Pelkey S.,
Williams M. A.,
Nichols A. V.
Publication year - 1988
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02535289
Subject(s) - lipidology , coconut oil , clinical chemistry , cottonseed , essential fatty acid , cholesteryl ester , chemistry , medicine , high density lipoprotein , saturated fat , endocrinology , cholesterol , fatty acid , saturated fatty acid , food science , cottonseed oil , lipoprotein , biochemistry , biology , linoleic acid
Rat plasma high density lipoproteins (HDL) are comprised of two major particle size subpopulations, HDL 1 (255 Å−140 Å) and HDL 2 (140 Å−84 Å), in which the proportion of arachidonate in fatty acids of cholesteryl esters is greater than 50%. To determine whether decreased availability of arachidonate for cholesterol esterification would alter the distribution and/or amounts of the HDL subpopulations, we compared HDL subpopulations in EFA‐deficient and control rats. To separate the effects of EFA deficiency and fat deficiency and to evaluate effects of different saturated fats, we used EFA‐deficient diets that were fat‐free or that contained 5% saturated fat. The control diets were the EFA‐deficient diets plus 1% safflower oil. The saturated fats were hydrogenated coconut oil, hydrogenated cottonseed oil and saturated medium‐chain triglycerides. All EFA‐deficient diets decreased the proportion of the HDL 1 subpopulation and the peak diameter of the HDL 2 subpopulation. These changes appeared after quite brief EFA depletion in young rats and may be related to the increased liver cholesteryl ester concentrations typical of EFA‐deficient rats.