Journal
NEUROBIOLOGY OF DISEASE
Volume 33, Issue 3, Pages 482-498Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.nbd.2008.12.002
Keywords
APPswe/PS1dE9 transgenic mice; MRI; Cerebral blood volume; Alzheimer's Disease; Amyloid-beta; Cholesterol; DHA; Cognition
Categories
Funding
- EU [QLRT-2002-172]
- Netherlands organization for Health Research and Development [910-31-704]
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Cholesterol and docosahexenoic acid (DHA) may affect degenerative processes in Alzheimer's Disease (AD) by influencing A beta metabolism indirectly via the vasculature. We investigated whether DHA-enriched diets or cholesterol-containing Typical Western Diets (TWD) alter behavior and cognition, cerebral hemodynamics (relative cerebral blood volume (rCBV)) and A beta deposition in 8- and 15-month-old APP(swe)/PS1(dE9) mice. In addition we investigated whether changes in rCBV precede changes in A beta deposition or vice versa. Mice were fed regular rodent chow, a TWD-, or a DHA-containing diet. Behavior, learning and memory were investigated, and rCBV was measured using contrast-enhanced MRI. The A beta load was visualized immunohistochemically. We demonstrate that DHA altered rCBV in 8-month-old APP/PS1 and wild type mice[AU1]. In 15-month-old APP/PS1 mice DHA supplementation improved spatial memory, decreased A beta deposition and slightly increased rCBV, indicating that a DHA-enriched diet can diminish AD-like pathology. In contrast, TWD diets decreased rCBV in 15-month-old mice. The present data indicate that long-term dietary interventions change AD-like pathology in APP/PS1 mice. Additionally, effects of the tested diets on vascular parameters were observed before effects on A beta load were noted. These data underline the importance of vascular factors in the APP/PS1 mouse model of AD pathology. (C) 2008 Elsevier Inc. All rights reserved.
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