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Differential effects of dietary linoleic and alpha-linolenic acid on lipid metabolism in rat tissues.
Lipids. 1988 Sep; 23(9):847-52.L

Abstract

Comparative effects of feeding dietary linoleic (safflower oil) and alpha-linolenic (linseed oil) acids on the cholesterol content and fatty acid composition of plasma, liver, heart and epididymal fat pads of rats were examined. Animals fed hydrogenated beef tallow were used as isocaloric controls. Plasma cholesterol concentration was lower and the cholesterol level in liver increased in animals fed the safflower oil diet. Feeding the linseed oil diet was more effective in lowering plasma cholesterol content and did not result in cholesterol accumulation in the liver. The cholesterol concentration in heart and the epididymal fat pad was not affected by the type of dietary fatty acid fed. Arachidonic acid content of plasma lipids was significantly elevated in animals fed the safflower oil diet and remained unchanged by feeding the linseed oil diet, when compared with the isocaloric control animals fed hydrogenated beef tallow. Arachidonic acid content of liver and heart lipids was lower in animals fed diets containing safflower oil or linseed oil. Replacement of 50% of the safflower oil in the diet with linseed oil increased alpha-linolenic, docosapentaenoic and docosahexaenoic acids in plasma, liver, heart and epididymal fat pad lipids. These results suggest that dietary 18:2 omega 6 shifts cholesterol from plasma to liver pools followed by redistribution of 20:4 omega 6 from tissue to plasma pools. This redistribution pattern was not apparent when 18:3 omega 3 was included in the diet.

Authors+Show Affiliations

Department of Foods & Nutrition, University of Alberta, Edmonton, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

2903427

Citation

Garg, M L., et al. "Differential Effects of Dietary Linoleic and Alpha-linolenic Acid On Lipid Metabolism in Rat Tissues." Lipids, vol. 23, no. 9, 1988, pp. 847-52.
Garg ML, Sebokova E, Wierzbicki A, et al. Differential effects of dietary linoleic and alpha-linolenic acid on lipid metabolism in rat tissues. Lipids. 1988;23(9):847-52.
Garg, M. L., Sebokova, E., Wierzbicki, A., Thomson, A. B., & Clandinin, M. T. (1988). Differential effects of dietary linoleic and alpha-linolenic acid on lipid metabolism in rat tissues. Lipids, 23(9), 847-52.
Garg ML, et al. Differential Effects of Dietary Linoleic and Alpha-linolenic Acid On Lipid Metabolism in Rat Tissues. Lipids. 1988;23(9):847-52. PubMed PMID: 2903427.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential effects of dietary linoleic and alpha-linolenic acid on lipid metabolism in rat tissues. AU - Garg,M L, AU - Sebokova,E, AU - Wierzbicki,A, AU - Thomson,A B, AU - Clandinin,M T, PY - 1988/9/1/pubmed PY - 1988/9/1/medline PY - 1988/9/1/entrez SP - 847 EP - 52 JF - Lipids JO - Lipids VL - 23 IS - 9 N2 - Comparative effects of feeding dietary linoleic (safflower oil) and alpha-linolenic (linseed oil) acids on the cholesterol content and fatty acid composition of plasma, liver, heart and epididymal fat pads of rats were examined. Animals fed hydrogenated beef tallow were used as isocaloric controls. Plasma cholesterol concentration was lower and the cholesterol level in liver increased in animals fed the safflower oil diet. Feeding the linseed oil diet was more effective in lowering plasma cholesterol content and did not result in cholesterol accumulation in the liver. The cholesterol concentration in heart and the epididymal fat pad was not affected by the type of dietary fatty acid fed. Arachidonic acid content of plasma lipids was significantly elevated in animals fed the safflower oil diet and remained unchanged by feeding the linseed oil diet, when compared with the isocaloric control animals fed hydrogenated beef tallow. Arachidonic acid content of liver and heart lipids was lower in animals fed diets containing safflower oil or linseed oil. Replacement of 50% of the safflower oil in the diet with linseed oil increased alpha-linolenic, docosapentaenoic and docosahexaenoic acids in plasma, liver, heart and epididymal fat pad lipids. These results suggest that dietary 18:2 omega 6 shifts cholesterol from plasma to liver pools followed by redistribution of 20:4 omega 6 from tissue to plasma pools. This redistribution pattern was not apparent when 18:3 omega 3 was included in the diet. SN - 0024-4201 UR - https://www.unboundmedicine.com/medline/citation/2903427/Differential_effects_of_dietary_linoleic_and_alpha_linolenic_acid_on_lipid_metabolism_in_rat_tissues_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0024-4201&date=1988&volume=23&issue=9&spage=847 DB - PRIME DP - Unbound Medicine ER -