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Dietary vitamin E, brain redox status and expression of Alzheimer's disease-relevant genes in rats

  • Sonja Gaedicke (a1), Xiangnan Zhang (a2), Patricia Huebbe (a1), Christine Boesch-Saadatmandi (a1), Yijia Lou (a2), Ingrid Wiswedel (a3), Andreas Gardemann (a3), Jan Frank (a1) and Gerald Rimbach (a1)
  • DOI:
  • Published online: 28 January 2009

Oxidative stress is one of the major pathological features of Alzheimer's disease (AD). Here, we investigated whether dietary vitamin E (VE) depletion may induce adverse effects and supplementation with α-tocopherol (αT) may result in beneficial effects on redox status and the regulation of genes relevant in the pathogenesis of AD in healthy rats. Three groups of eight male rats each were fed diets with deficient ( < 1 mg αT equivalents/kg diet), marginal (9 mg αT equivalents/kg diet) or sufficient (18 mg αT equivalents/kg diet) concentrations of natural-source VE for 6 months; a fourth group was fed the VE-sufficient diet fortified with αT (total VE, 146 mg αT equivalents/kg diet). Feeding of the experimental diets dose dependently altered αT concentrations in the cortex and plasma. No significant changes in F2-isoprostane concentrations, activities of antioxidative enzymes (total superoxide dismutase, Se-dependent glutathione peroxidase) and concentrations of glutathione or the expression of AD-relevant genes were observed. In this non-AD model, depletion of VE did not induce adverse effects and supplementation of αT did not induce positive effects on the parameters related to the progression of AD.

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*Corresponding author: Gerald Rimbach, fax +49 431 880 26 28, email
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British Journal of Nutrition
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