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Genome-wide association studies of cerebral white matter lesion burden: the CHARGE consortium.

Fornage M., Debette S., Bis JC., Schmidt H., Ikram MA., Dufouil C., Sigurdsson S., Lumley T., DeStefano AL., Fazekas F., Vrooman HA., Shibata DK., Maillard P., Zijdenbos A., Smith AV., Gudnason H., de Boer R., Cushman M., Mazoyer B., Heiss G., Vernooij MW., Enzinger C., Glazer NL., Beiser A., Knopman DS., Cavalieri M., Niessen WJ., Harris TB., Petrovic K., Lopez OL., Au R., Lambert J-C., Hofman A., Gottesman RF., Garcia M., Heckbert SR., Atwood LD., Catellier DJ., Uitterlinden AG., Yang Q., Smith NL., Aspelund T., Romero JR., Rice K., Taylor KD., Nalls MA., Rotter JI., Sharrett R., van Duijn CM., Amouyel P., Wolf PA., Gudnason V., van der Lugt A., Boerwinkle E., Psaty BM., Seshadri S., Tzourio C., Breteler MMB., Mosley TH., Schmidt R., Longstreth WT., DeCarli C., Launer LJ.

ObjectiveWhite matter hyperintensities (WMHs) detectable by magnetic resonance imaging are part of the spectrum of vascular injury associated with aging of the brain and are thought to reflect ischemic damage to the small deep cerebral vessels. WMHs are associated with an increased risk of cognitive and motor dysfunction, dementia, depression, and stroke. Despite a significant heritability, few genetic loci influencing WMH burden have been identified.MethodsWe performed a meta-analysis of genome-wide association studies (GWASs) for WMH burden in 9,361 stroke-free individuals of European descent from 7 community-based cohorts. Significant findings were tested for replication in 3,024 individuals from 2 additional cohorts.ResultsWe identified 6 novel risk-associated single nucleotide polymorphisms (SNPs) in 1 locus on chromosome 17q25 encompassing 6 known genes including WBP2, TRIM65, TRIM47, MRPL38, FBF1, and ACOX1. The most significant association was for rs3744028 (p(discovery) = 4.0 × 10(-9) ; p(replication) = 1.3 × 10(-7) ; p(combined) = 4.0 × 10(-15) ). Other SNPs in this region also reaching genome-wide significance were rs9894383 (p = 5.3 × 10(-9) ), rs11869977 (p = 5.7 × 10(-9) ), rs936393 (p = 6.8 × 10(-9) ), rs3744017 (p = 7.3 × 10(-9) ), and rs1055129 (p = 4.1 × 10(-8) ). Variant alleles at these loci conferred a small increase in WMH burden (4-8% of the overall mean WMH burden in the sample).InterpretationThis large GWAS of WMH burden in community-based cohorts of individuals of European descent identifies a novel locus on chromosome 17. Further characterization of this locus may provide novel insights into the pathogenesis of cerebral WMH.

More information Original publication

DOI

10.1002/ana.22403

Type

Journal article

Publication Date

2011-06-01T00:00:00+00:00

Volume

69

Pages

928 - 939

Total pages

11

Addresses

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Keywords

Cerebral Cortex, Nerve Fibers, Myelinated, Chromosomes, Human, Pair 17, Humans, Movement Disorders, Genetic Predisposition to Disease, RNA, Messenger, Magnetic Resonance Imaging, Cohort Studies, Cognition Disorders, Residence Characteristics, Gene Frequency, Genotype, Polymorphism, Single Nucleotide, Aged, Aged, 80 and over, Middle Aged, Female, Male, Genome-Wide Association Study, Leukoencephalopathies, White People