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• W2017456650 abstract "APOE ɛ4 is the best-established genetic risk factor for sporadic Alzheimer's disease (AD). However, while homozygotes show greater disease susceptibility and earlier age of onset than heterozygotes, they may not show faster rates of clinical progression. We hypothesize that there are differential APOE ɛ4 allele-load dependent influences on neuropathology across the brain. Our aim was to define the relationship between APOE ɛ4 allele load and regionally-specific brain cortical atrophy in Alzheimer's Disease (AD). For this reason voxel-based morphometry (VBM) was performed using T1-weighted MR images from 83 AD patients, contrasting regional cortical grey matter by APOE ɛ4 load according to either dominant or genotypic models. Patients fulfilled NINCDS-ADRDA criteria and were genotyped for APOE ɛ4 (15 ɛ4/ɛ4, 39 ɛ4/− and 29−/−). We observed that grey matter volume (GMV) decreased additively with increasing allele load in the medial (MTL) and anterior temporal lobes bilaterally. By contrast, a 2 degree-of-freedom genotypic model suggested a dominant effect of the APOE ɛ4 allele in the left temporal lobe. Brain regions showing a significant APOE ɛ4 allele load effect on GMV in AD included only some of those typically described as having greatest amyloid plaque deposition and atrophy. Temporal regions appeared to show a dominant effect of APOE ɛ4 allele load instead of the additive effect previously strongly associated with age of onset. Regional variations with allele load may be related to different mechanisms for effects of APOE ɛ4 load on susceptibility and disease progression." @default.
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• W2017456650 date "2009-02-01" @default.
• W2017456650 modified "2023-09-25" @default.
• W2017456650 title "Anatomically-distinct genetic associations of APOE ɛ4 allele load with regional cortical atrophy in Alzheimer's disease" @default.
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• W2017456650 doi "https://doi.org/10.1016/j.neuroimage.2008.10.003" @default.
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