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http://dx.doi.org/10.5352/JLS.2009.19.10.1417

Effect of Treatment with Docosahexaenoic Acid into N-3 Fatty Acid Deficient and Adequate Diets on Rat Brain and Liver Fatty Acid Composition  

Lim, Sun-Young (Division of Marine Environment & Bioscience, Korea Maritime University)
Publication Information
Journal of Life Science / v.19, no.10, 2009 , pp. 1417-1423 More about this Journal
Abstract
Previous studies have suggested that docosahexaenoic acid (DHA) supplementation into n-3 fatty acid deficient diet improved spatial learning performance, but there was no significant difference in brain related function when DHA was added into a n-3 fatty acid adequate diet. Here, we investigated the effect of adding DHA into an n-3 fatty acid deficient or adequate diet on brain and liver fatty acid composition. On the second day after conception, Sprague Dawley strain dams were divided into four groups as follows; n-3 fatty acid deficient (Def), n-3 fatty acid deficient plus DHA (Def+DHA, 10.2% DHA), n-3 fatty acid adequate (Adq, 3.4% linolenic acid), and n-3 fatty acid adequate plus DHA (Adq+DHA, 3.31% linolenic acid plus 9.65% DHA). After weaning, male pups were fed on the same diets of their respective dams until adulthood. In brain fatty acid composition, the Def group showed a lower brain DHA (64% decrease), which was largely compensated for by an increase in docosapentaenoic acid (22:5n-6). Brain DHA in the Def+DHA group was increased to almost the same extent as in the Adq and Adq+DHA groups and there were no significant differences among them. Liver fatty acid composition showed a similar pattern to that of the brain, but liver DHA in the Def+DHA showed the highest percentage among the diet groups. In conclusion, n-3 fatty acid deficiency from gestation to adulthood leads to decreased brain DHA, which has been shown to be highly associated with poor spatial leaning performance. Thus, adequate brain DHA levels are required for optimal nervous function.
Keywords
Brain function; docosahexaenoic acid; docosapentaenoic acid; n-3 fatty acid; fatty acid composition;
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