Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Whether novel risk variants of Alzheimer's disease (AD) identified through genome-wide association studies also influence magnetic resonance imaging-based intermediate phenotypes of AD in the general population is unclear. We studied association of 24 AD risk loci with intracranial volume, total brain volume, hippocampal volume (HV), white matter hyperintensity burden, and brain infarcts in a meta-analysis of genetic association studies from large population-based samples (N = 8175-11,550). In single-SNP based tests, AD risk allele of APOE (rs2075650) was associated with smaller HV (p = 0.0054) and CD33 (rs3865444) with smaller intracranial volume (p = 0.0058). In gene-based tests, there was associations of HLA-DRB1 with total brain volume (p = 0.0006) and BIN1 with HV (p = 0.00089). A weighted AD genetic risk score was associated with smaller HV (beta ± SE = -0.047 ± 0.013, p = 0.00041), even after excluding the APOE locus (p = 0.029). However, only association of AD genetic risk score with HV, including APOE, was significant after multiple testing correction (including number of independent phenotypes tested). These results suggest that novel AD genetic risk variants may contribute to structural brain aging in nondemented older community persons.

Original publication

DOI

10.1016/j.neurobiolaging.2014.12.028

Type

Journal article

Journal

Neurobiol Aging

Publication Date

04/2015

Volume

36

Pages

1765.e7 - 1765.e16

Keywords

Alzheimer, GWAS, Genetic risk score, Hippocampal volume, MRI-Markers, Aging, Alleles, Alzheimer Disease, Apolipoproteins E, Brain, Female, Genome-Wide Association Study, Hippocampus, Humans, Magnetic Resonance Imaging, Male, Organ Size, Polymorphism, Single Nucleotide, Risk, Sialic Acid Binding Ig-like Lectin 3