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Published in: European Archives of Psychiatry and Clinical Neuroscience 4/2020

01-06-2020 | Alzheimer's Disease | Original Paper

The implication of BDNF Val66Met polymorphism in progression from subjective cognitive decline to mild cognitive impairment and Alzheimer’s disease: a 9-year follow-up study

Authors: Valentina Bessi, Salvatore Mazzeo, Silvia Bagnoli, Sonia Padiglioni, Marco Carraro, Irene Piaceri, Laura Bracco, Sandro Sorbi, Benedetta Nacmias

Published in: European Archives of Psychiatry and Clinical Neuroscience | Issue 4/2020

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Abstract

Brain-derived natriuretic factor (BDNF) Val66Met polymorphism has been frequently reported to be associated with Alzheimer’s disease (AD) with contrasting results. Numerous studies showed that Met allele increased the risk of AD only in women, while other studies have found worse cognitive performance in Val/Val carriers. We aimed to inquire the effects of Val66Met polymorphism on the progression from subjective cognitive decline (SCD) to mild cognitive impairment (MCI) and from MCI to AD and to ascertain if this effect is modulated by demographic and cognitive variables. For this purpose, we followed up 74 subjects (48 SCD, 26 MCI) for a mean time of 9 years. All participants underwent extensive neuropsychological assessment, cognitive reserve estimation, BDNF and apolipoprotein E (ApoE) genotype analysis at baseline. Personality traits and leisure activities were assessed in a subgroup. Each patient underwent clinical–neuropsychological follow-up, during which 18 out of 48 SCD subjects progressed to MCI and 14 out of 26 MCI subjects progressed to AD. We found that Val66Met increased the risk of progression from SCD to MCI and from MCI to AD only in women. Nevertheless, Val/Val carriers who progressed from SCD to MCI had a shorter conversion time compared to Met carriers. We concluded that Val66Met polymorphism might play different roles depending on sex and stage of the disease.
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Metadata
Title
The implication of BDNF Val66Met polymorphism in progression from subjective cognitive decline to mild cognitive impairment and Alzheimer’s disease: a 9-year follow-up study
Authors
Valentina Bessi
Salvatore Mazzeo
Silvia Bagnoli
Sonia Padiglioni
Marco Carraro
Irene Piaceri
Laura Bracco
Sandro Sorbi
Benedetta Nacmias
Publication date
01-06-2020
Publisher
Springer Berlin Heidelberg
Published in
European Archives of Psychiatry and Clinical Neuroscience / Issue 4/2020
Print ISSN: 0940-1334
Electronic ISSN: 1433-8491
DOI
https://doi.org/10.1007/s00406-019-01069-y

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