Faster progression from MCI to probable AD for carriers of a single-nucleotide polymorphism associated with type 2 diabetes.

TitleFaster progression from MCI to probable AD for carriers of a single-nucleotide polymorphism associated with type 2 diabetes.
Publication TypeJournal Article
Year of Publication2018
AuthorsGirard, H, Potvin, O, Nugent, S, Dallaire-Théroux, C, Cunnane, S, Duchesne, S
Corporate AuthorsAlzheimer's Disease Neuroimaging Initiative
JournalNeurobiol Aging
Volume64
Pagination157.e11-157.e17
Date Published2018 Apr
ISSN1558-1497
Abstract

Sporadic Alzheimer's disease (AD), as opposed to its autosomal dominant form, is likely caused by a complex interaction of genetic, environmental, and health lifestyle factors. Twin studies indicate that sporadic AD heritability could be between 58% and 79%, around half of which is explained by the ε4 allele of the apolipoprotein E (APOE4). We hypothesized that genes associated with known risk factors for AD, namely hypertension, hypercholesterolemia, obesity, diabetes, and cardiovascular disease, would contribute significantly to the remaining heritability. We analyzed 22 AD-associated single-nucleotide polymorphisms (SNPs), associated with these risk factors, that were included in the sequencing data of the Alzheimer's Disease Neuroimaging Initiative 1 data set, which included 355 participants with mild cognitive impairment (MCI). We built survival models with the selected SNPs to predict progression of MCI to probable AD over the 10-year follow-up of the study. The rs391300 SNP, located on the serine racemase (SRR) gene and linked to increased susceptibility to type 2 diabetes, was associated with progression from MCI to probable AD.

DOI10.1016/j.neurobiolaging.2017.11.013
Alternate JournalNeurobiol. Aging
PubMed ID29338921