Journal
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES
Volume 63, Issue 11, Pages 1153-1160Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/gerona/63.11.1153
Keywords
Alzheimer's disease; n-3 Polyunsaturated fatty acids; Docosahexaenoic acid; Hippocampus; Memory
Categories
Funding
- VA Merit Award [R01NS41863, R01AA12743, R21DA019386]
- Medical Research Service of the Department of Veterans Affairs
- Icelandic Research Fund
- University of Iceland Research Fund
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Animal studies have shown that a deficiency in brain of the n-3 polyunsaturated fatty acid (PUFA) docosahexaenoic acid (DHA) is associated with memory loss and diminished cognitive function. The senescence-accelerated prone 8 (SAMP8) mouse develops impairments in learning and memory at 8-12 months of age. The effect of diet supplemented with n-3 PUFA on brain phospholipid DHA status, learning, and memory ability in aged SAMP8 mice was investigated. At the age of 10 months, SAMP8 mice were fed either a low-DHA or a high-DHA diet for 8 weeks. In comparison to SAMP8 mice fed the low-DHA diet, those fed a high-DHA diet had improved acquisition and retention in a T-maze foot shock avoidance test and a higher proportion of DHA in hippocampal and amygdala phospholipids. This study demonstrates that, in mature animals, DHA is incorporated into brain phospholipids and that dietary n-3 PUFA is associated with delay in cognitive decline.
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