Platelets provide human tissue to unravel pathogenic mechanisms of Alzheimer disease

Progress in Neuro-psychopharmacology & Biological Psychiatry
F CattabeniMonica Di Luca

Abstract

Alzheimer disease (AD) is a progressive neurodegenerative disorder characterised by a progressive cognitive and memory decline. From a neuropathological point of view, Alzheimer disease is defined by the presence of characteristic lesions, i.e. mature senile plaques, neurofibrillary tangles and amyloid angiopathy. In particular, accumulation of the amyloid beta-peptide in the brain parenchyma and vasculature is an invariant event in the pathogenesis of both sporadic and familial Alzheimer cases. Amyloid beta-peptide originates from a larger precursor, the Amyloid Precursor Protein (APP) ubiquitously expressed. Among the different peripheral cells expressing APP forms, platelets are particularly interesting since they show concentrations of its isoforms equivalent to those found in brain. Moreover, a number of laboratories independently described alterations in APP metabolism/concentration in platelets of Alzheimer patients when compared to control subjects matched for demographic characteristics. These observations defined the frame of our work aimed to investigate if a correlation between levels of platelet APP forms and Alzheimer disease could be detected. We have reported that patients affected by Alzheimer disease show a di...Continue Reading

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