TY - JOUR T1 - Association of Alzheimer's disease GWAS loci with MRI markers of brain aging. JF - Neurobiol Aging Y1 - 2015 A1 - Chauhan, Ganesh A1 - Adams, Hieab H H A1 - Bis, Joshua C A1 - Weinstein, Galit A1 - Yu, Lei A1 - Töglhofer, Anna Maria A1 - Smith, Albert Vernon A1 - van der Lee, Sven J A1 - Gottesman, Rebecca F A1 - Thomson, Russell A1 - Wang, Jing A1 - Yang, Qiong A1 - Niessen, Wiro J A1 - Lopez, Oscar L A1 - Becker, James T A1 - Phan, Thanh G A1 - Beare, Richard J A1 - Arfanakis, Konstantinos A1 - Fleischman, Debra A1 - Vernooij, Meike W A1 - Mazoyer, Bernard A1 - Schmidt, Helena A1 - Srikanth, Velandai A1 - Knopman, David S A1 - Jack, Clifford R A1 - Amouyel, Philippe A1 - Hofman, Albert A1 - DeCarli, Charles A1 - Tzourio, Christophe A1 - van Duijn, Cornelia M A1 - Bennett, David A A1 - Schmidt, Reinhold A1 - Longstreth, William T A1 - Mosley, Thomas H A1 - Fornage, Myriam A1 - Launer, Lenore J A1 - Seshadri, Sudha A1 - Ikram, M Arfan A1 - Debette, Stephanie KW - Aging KW - Alleles KW - Alzheimer Disease KW - Apolipoproteins E KW - Brain KW - Female KW - Genome-Wide Association Study KW - Hippocampus KW - Humans KW - Magnetic Resonance Imaging KW - Male KW - Organ Size KW - Polymorphism, Single Nucleotide KW - Risk KW - Sialic Acid Binding Ig-like Lectin 3 AB -

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.

VL - 36 IS - 4 U1 - http://www.ncbi.nlm.nih.gov/pubmed/25670335?dopt=Abstract ER -