Title

Decreased Platelet APP Isoform Ratios in Autosomal Dominant Alzheimer's Disease: Baseline Data from a DIAN Cohort Subset

Document Type

Journal Article

Publisher

Bentham Science Publishers

Faculty

Faculty of Health, Engineering and Science

School

School of Medical Sciences, Centre of Excellence for Alzheimer's Disease Research And Care

Comments

Originally published as : Chatterjee, P., B Gupta, V., M Fagan, A., S Jasielec, M., Xiong, C., R Sohrabi, H., ... & Benzinger, T. (2015). Decreased Platelet APP Isoform Ratios in Autosomal Dominant Alzheimer's Disease: Baseline Data from a DIAN Cohort Subset. Current Alzheimer Research, 12(2), 157-164. Original article available here

Abstract

Introduction: This study examines platelet amyloid precursor protein (APP) isoform ratios of 120KDa to 110KDa (APPr) between mutation carriers (MC) carrying a mutation for autosomal dominant Alzheimer's disease (ADAD) and non-carriers (NC). Two previous studies reported no significant difference in APPr between ADAD MC and NC, which may have been due to the small sample size in both studies. The current study examines APPr in MC versus NC in a larger sample. In addition, it investigated whether APPr correlate with neuroimaging data, neuropsychological data and cerebrospinal fluid biomarkers in a cohort subset derived from the Dominantly Inherited Alzheimer Network (DIAN) study. Methods: APPr were quantified by western blotting. Fifteen MC (symptomatic and asymptomatic) were compared against twelve NC using univariate general linear model. All participants underwent neuroimaging and neuropsychological testing which were correlated with APPr using Pearson's correlation coefficient (r). Results: APPr were lower in MC compared to NC (p=0.003) while Mini-Mental State Examination (MMSE) scores were not significantly different (p>0.1). Furthermore, APPr inversely correlated with amyloid imaging in the Caudate Nucleus (r=-0.505; p

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