Linked Life Data

18030662

Source:http://linkedlifedata.com/resource/pubmed/id/18030662

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pubmed-article:18030662pubmed:abstractTextApolipoprotein E4 (apoE4) genotype is associated with an increased risk for Alzheimer's disease (AD). This is thought to be in part attributable to an impact of apoE genotype on the processing of the transmembrane amyloid precursor protein (APP) thereby contributing to amyloid beta peptide formation in apoE4 carriers, which is a primary patho-physiological feature of AD. As apoE and alpha-tocopherol (alpha-toc) have been shown to modulate membrane bilayer properties and hippocampal gene expression, we studied the effect of apoE genotype on APP metabolism and cell cycle regulation in response to dietary alpha-toc. ApoE3 and apoE4 transgenic mice were fed a diet low (VE) or high (+VE) in vitamin E (3 and 235 mg alpha-toc/kg diet, respectively) for 12 weeks. Cholesterol levels and membrane fluidity were not different in synaptosomal plasma membranes isolated from brains of apoE3 and apoE4 mice (-VE and +VE). Non-amyloidogenic alpha-secretase mRNA concentration and activity were significantly higher in brains of apoE3 relative to apoE4 mice irrespective of the dietary alpha-toc supply, while amyloidogenic beta-secretase and gamma-secretase remained unchanged. Relative mRNA concentration of cell cycle related proteins were modulated differentially by dietary alpha-toc supplementation in apoE3 and apoE4 mice, suggesting genotype-dependent signalling effects on cell cycle regulation.lld:pubmed
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pubmed-article:18030662pubmed:year2007lld:pubmed
pubmed-article:18030662pubmed:articleTitleApolipoprotein E genotype and alpha-tocopherol modulate amyloid precursor protein metabolism and cell cycle regulation.lld:pubmed
pubmed-article:18030662pubmed:affiliationInstitute of Human Nutrition and Food Science, Christian Albrechts University of Kiel, Hermann-Rodewald-Strasse 6, Kiel, Germany.lld:pubmed
pubmed-article:18030662pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:18030662pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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