TY - JOUR T1 - Multiethnic genome-wide association study of cerebral white matter hyperintensities on MRI. JF - Circ Cardiovasc Genet Y1 - 2015 A1 - Verhaaren, Benjamin F J A1 - Debette, Stephanie A1 - Bis, Joshua C A1 - Smith, Jennifer A A1 - Ikram, M Kamran A1 - Adams, Hieab H A1 - Beecham, Ashley H A1 - Rajan, Kumar B A1 - Lopez, Lorna M A1 - Barral, Sandra A1 - van Buchem, Mark A A1 - van der Grond, Jeroen A1 - Smith, Albert V A1 - Hegenscheid, Katrin A1 - Aggarwal, Neelum T A1 - de Andrade, Mariza A1 - Atkinson, Elizabeth J A1 - Beekman, Marian A1 - Beiser, Alexa S A1 - Blanton, Susan H A1 - Boerwinkle, Eric A1 - Brickman, Adam M A1 - Bryan, R Nick A1 - Chauhan, Ganesh A1 - Chen, Christopher P L H A1 - Chouraki, Vincent A1 - de Craen, Anton J M A1 - Crivello, Fabrice A1 - Deary, Ian J A1 - Deelen, Joris A1 - De Jager, Philip L A1 - Dufouil, Carole A1 - Elkind, Mitchell S V A1 - Evans, Denis A A1 - Freudenberger, Paul A1 - Gottesman, Rebecca F A1 - Guðnason, Vilmundur A1 - Habes, Mohamad A1 - Heckbert, Susan R A1 - Heiss, Gerardo A1 - Hilal, Saima A1 - Hofer, Edith A1 - Hofman, Albert A1 - Ibrahim-Verbaas, Carla A A1 - Knopman, David S A1 - Lewis, Cora E A1 - Liao, Jiemin A1 - Liewald, David C M A1 - Luciano, Michelle A1 - van der Lugt, Aad A1 - Martinez, Oliver O A1 - Mayeux, Richard A1 - Mazoyer, Bernard A1 - Nalls, Mike A1 - Nauck, Matthias A1 - Niessen, Wiro J A1 - Oostra, Ben A A1 - Psaty, Bruce M A1 - Rice, Kenneth M A1 - Rotter, Jerome I A1 - von Sarnowski, Bettina A1 - Schmidt, Helena A1 - Schreiner, Pamela J A1 - Schuur, Maaike A1 - Sidney, Stephen S A1 - Sigurdsson, Sigurdur A1 - Slagboom, P Eline A1 - Stott, David J M A1 - van Swieten, John C A1 - Teumer, Alexander A1 - Töglhofer, Anna Maria A1 - Traylor, Matthew A1 - Trompet, Stella A1 - Turner, Stephen T A1 - Tzourio, Christophe A1 - Uh, Hae-Won A1 - Uitterlinden, André G A1 - Vernooij, Meike W A1 - Wang, Jing J A1 - Wong, Tien Y A1 - Wardlaw, Joanna M A1 - Windham, B Gwen A1 - Wittfeld, Katharina A1 - Wolf, Christiane A1 - Wright, Clinton B A1 - Yang, Qiong A1 - Zhao, Wei A1 - Zijdenbos, Alex A1 - Jukema, J Wouter A1 - Sacco, Ralph L A1 - Kardia, Sharon L R A1 - Amouyel, Philippe A1 - Mosley, Thomas H A1 - Longstreth, W T A1 - DeCarli, Charles C A1 - van Duijn, Cornelia M A1 - Schmidt, Reinhold A1 - Launer, Lenore J A1 - Grabe, Hans J A1 - Seshadri, Sudha S A1 - Ikram, M Arfan A1 - Fornage, Myriam KW - Aged KW - Aged, 80 and over KW - Chromosomes, Human KW - Continental Population Groups KW - Female KW - Genetic Loci KW - Genome-Wide Association Study KW - Humans KW - Male KW - Meta-Analysis as Topic KW - Middle Aged KW - Models, Genetic KW - Stroke KW - White Matter AB -

BACKGROUND: The burden of cerebral white matter hyperintensities (WMH) is associated with an increased risk of stroke, dementia, and death. WMH are highly heritable, but their genetic underpinnings are incompletely characterized. To identify novel genetic variants influencing WMH burden, we conducted a meta-analysis of multiethnic genome-wide association studies.

METHODS AND RESULTS: We included 21 079 middle-aged to elderly individuals from 29 population-based cohorts, who were free of dementia and stroke and were of European (n=17 936), African (n=1943), Hispanic (n=795), and Asian (n=405) descent. WMH burden was quantified on MRI either by a validated automated segmentation method or a validated visual grading scale. Genotype data in each study were imputed to the 1000 Genomes reference. Within each ethnic group, we investigated the relationship between each single-nucleotide polymorphism and WMH burden using a linear regression model adjusted for age, sex, intracranial volume, and principal components of ancestry. A meta-analysis was conducted for each ethnicity separately and for the combined sample. In the European descent samples, we confirmed a previously known locus on chr17q25 (P=2.7×10(-19)) and identified novel loci on chr10q24 (P=1.6×10(-9)) and chr2p21 (P=4.4×10(-8)). In the multiethnic meta-analysis, we identified 2 additional loci, on chr1q22 (P=2.0×10(-8)) and chr2p16 (P=1.5×10(-8)). The novel loci contained genes that have been implicated in Alzheimer disease (chr2p21 and chr10q24), intracerebral hemorrhage (chr1q22), neuroinflammatory diseases (chr2p21), and glioma (chr10q24 and chr2p16).

CONCLUSIONS: We identified 4 novel genetic loci that implicate inflammatory and glial proliferative pathways in the development of WMH in addition to previously proposed ischemic mechanisms.

VL - 8 IS - 2 U1 - http://www.ncbi.nlm.nih.gov/pubmed/25663218?dopt=Abstract ER -