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  • Title: Upregulation of amyloid precursor protein isoforms containing Kunitz protease inhibitor in dementia with Lewy bodies.
    Author: Beyer K, Lao JI, Carrato C, Mate JL, López D, Ferrer I, Ariza A.
    Journal: Brain Res Mol Brain Res; 2004 Nov 24; 131(1-2):131-5. PubMed ID: 15530662.
    Abstract:
    Amyloid precursor protein (APP) is involved in the accumulation of alpha-synuclein, the main component of Lewy bodies. It is currently unknown, however, whether any of the APP isoforms is instrumental in alpha-synuclein deposition in dementia with Lewy bodies (DLB). Using real-time RT-PCR, we have studied relative mRNA expression levels of APP isoforms in frozen postmortem frontal cortices of DLB patients, Alzheimer disease (AD) patients, and control subjects. Of the three main APP isoforms, the two with a Kunitz protease inhibitory (KPI) motif (APP770 and APP751) were found to be specifically overexpressed in the frontal cortices of DLB patients when compared with controls and AD patients. These findings suggest a specific role of APP isoforms containing Kunitz protease inhibitor in DLB pathogenesis.
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