Long-Term Effect of Docosahexaenoic Acid Feeding on Lipid Composition and Brain Fatty Acid-Binding Protein Expression in Rats |
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| Authors: | Marwa E Elsherbiny Susan Goruk Elizabeth A Monckton Caroline Richard Miranda Brun Marwan Emara Catherine J Field Roseline Godbout |
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| Institution: | 1.Department of Oncology, Cross Cancer Institute, University of Alberta, 11560 University Avenue, Edmonton, AB T6G 1Z2, Canada; (M.E.E.); (E.A.M.); (M.B.);2.Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2E1, Canada; (S.G.); (C.R.); (C.J.F.);3.Centre for Aging and Associated Diseases, Zewail City for Science and Technology, Cairo 12588, Egypt; |
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| Abstract: | Arachidonic (AA) and docosahexaenoic acid (DHA) brain accretion is essential for brain development. The impact of DHA-rich maternal diets on offspring brain fatty acid composition has previously been studied up to the weanling stage; however, there has been no follow-up at later stages. Here, we examine the impact of DHA-rich maternal and weaning diets on brain fatty acid composition at weaning and three weeks post-weaning. We report that DHA supplementation during lactation maintains high DHA levels in the brains of pups even when they are fed a DHA-deficient diet for three weeks after weaning. We show that boosting dietary DHA levels for three weeks after weaning compensates for a maternal DHA-deficient diet during lactation. Finally, our data indicate that brain fatty acid binding protein (FABP7), a marker of neural stem cells, is down-regulated in the brains of six-week pups with a high DHA:AA ratio. We propose that elevated levels of DHA in developing brain accelerate brain maturation relative to DHA-deficient brains. |
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| Keywords: | arachidonic acid brain development brain lipids diet and dietary lipids fatty acid/binding protein |
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