title: Size frequency distribution of the beta-amyloid (abeta) deposits in dementia with Lewy bodies with associated Alzheimer's disease pathology.
abstract: The objective is to study beta-amyloid (Abeta) deposition in dementia with Lewy bodies (DLB) with Alzheimer's disease (AD) pathology (DLB/AD). The size frequency distributions of the Abeta deposits were studied and fitted by log-normal and power-law models. Patients were ten clinically and pathologically diagnosed DLB/AD cases. Size distributions had a single peak and were positively skewed and similar to those described in AD and Down's syndrome. Size distributions had smaller means in DLB/AD than in AD. Log-normal and power-law models were fitted to the size distributions of the classic and diffuse deposits, respectively. Size distributions of Abeta deposits were similar in DLB/AD and AD. Size distributions of the diffuse deposits were fitted by a power-law model suggesting that aggregation/disaggregation of Abeta was the predominant factor, whereas the classic deposits were fitted by a log-normal distribution suggesting that surface diffusion was important in the pathogenesis of the classic deposits.
authors.affiliation: Vision Sciences, Aston University, Birmingham B4 7ET, UK. R.A.Armstrong@aston.ac.uk
authors.forename: Richard A
authors.initials: RA
authors.lastname: Armstrong
authors.forename: Nigel J
authors.initials: NJ
authors.lastname: Cairns
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000378:metabolism* / Q000473:pathology*; D016229:Amyloid beta-Peptides / Q000378:metabolism*; D001921:Brain / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D016631:Lewy Bodies / Q000378:metabolism / Q000473:pathology; D020961:Lewy Body Disease / Q000378:metabolism* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D016874:Neurofibrillary Tangles / Q000378:metabolism / Q000473:pathology; D058225:Plaque, Amyloid / Q000378:metabolism / Q000473:pathology
chemical_list: D016229:Amyloid beta-Peptides