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Current Alzheimer Research

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ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

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Research Article

Asymptomatic Carriers of Presenilin-1 E318G Variant Show no Cerebrospinal Fluid Biochemical Signs Suggestive of Alzheimer’s disease in a Family with Late-onset Dementia

Author(s): Vladimiro Artuso, Luisa Benussi, Roberta Ghidoni, Soraya Moradi-Bachiller, Federica Fusco, Stefano Curtolo, Ignazio Roiter, Gianluigi Forloni and Diego Albani*

Volume 16, Issue 1, 2019

Page: [1 - 7] Pages: 7

DOI: 10.2174/1567205015666181031150345

Price: $65

Abstract

Background: Presenilin-1 (PSEN-1) is a component of the γ-secretase complex involved in β-amyloid Precursor Protein (AβPP) processing. Usually, Alzheimer’s disease (AD)-linked mutations in the PSEN-1 gene lead to the early onset and increase the production of the aggregation-prone peptide Aβ42. However, the PSEN-1 E318G variant has an unclear pathogenic role and is recently reported as a genetic risk factor for AD. In particular, E318G variant presence correlated with increased cerebrospinal fluid (CSF) levels of Total Tau (t-tau) and Phosphorylated Tau (p-tau).

Objective: We describe a large Italian family, which we followed from January 2003 to January 2018, with the late-onset AD and the E318G variant, with the aim of assessing E318G-associated CSF or plasma biochemical changes in biomarkers of dementia.

Method: CSF Aβ42, t-tau and p-tau, plasma Aβ42 and Aβ40 were assessed by ELISA tests, while CSF amyloid peptides profile was investigated by mass spectrometry.

Results: We did not find any changes in CSF biochemical markers (Aβ42, t-tau, p-tau and amyloid peptides) of asymptomatic E318G carriers in 2010 and 2012, but plasma Aβ40 was increased at the same times. From 2003 to 2018, no asymptomatic E318G carrier developed AD.

Conclusion: Our follow-up of this family may help elucidate E318G’s role in AD and globally points to a null effect of this variant.

Keywords: Alzheimer's disease, risk factor, familial dementia, amyloid-beta peptide, presenilin-1, E318G

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