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Genome-wide association study of intracranial aneurysm identifies a new association on chromosome 7

By Tatiana Foroud, Dongbing Lai, Daniel Koller, Femke van’t Hof, Mitja I. Kurki, Craig S. Anderson, Robert D. Brown, E. Sander Connolly, Johan G. Eriksson, Matthew Flaherty, Myriam Fornage, Mikael von und zuFraunberg, Emília I. Gaál, Aki Laakso, Juha Hernesniemi, John Huston, Juha E. Jääskeläinen, Lambertus A. Kiemeney, Riku Kivisaari, Dawn Kleindorfer, Nerissa Ko, Hanna Lehto, Jason Mackey, Irene Meissner, Charles J. Moomaw, Thomas H. Mosley, Marek Moskala, Mika Niemelä, Aarno Palotie, Joanna Pera, Gabriel Rinkel, Stephan Ripke, Guy Rouleau, Ynte Ruigrok, Laura Sauerbeck, Agnieszka Słowik, Sita H. Vermeulen, Daniel Woo, Bradford B. Worrall and Joseph Broderick


BACKGROUND AND PURPOSE: Common variants have been identified using genome-wide association studies which contribute to intracranial aneurysms (IA) susceptibility. However, it is clear that the variants identified to date do not account for the estimated genetic contribution to disease risk. METHODS: Initial analysis was performed in a discovery sample of 2617 IA cases and 2548 controls of white ancestry. Novel chromosomal regions meeting genome-wide significance were further tested for association in 2 independent replication samples: Dutch (717 cases; 3004 controls) and Finnish (799 cases; 2317 controls). A meta-analysis was performed to combine the results from the 3 studies for key chromosomal regions of interest. RESULTS: Genome-wide evidence of association was detected in the discovery sample on chromosome 9 (CDKN2BAS; rs10733376: P<1.0×10(-11)), in a gene previously associated with IA. A novel region on chromosome 7, near HDAC9, was associated with IA (rs10230207; P=4.14×10(-8)). This association replicated in the Dutch sample (P=0.01) but failed to show association in the Finnish sample (P=0.25). Meta-analysis results of the 3 cohorts reached statistical significant (P=9.91×10(-10)). CONCLUSIONS: We detected a novel region associated with IA susceptibility that was replicated in an independent Dutch sample. This region on chromosome 7 has been previously associated with ischemic stroke and the large vessel stroke occlusive subtype (including HDAC9), suggesting a possible genetic link between this stroke subtype and IA

Topics: Chromosomes, Human, Pair 7, genetics, European Continental Ancestry Group, Genome-Wide Association Study, methods, Intracranial Aneurysm, Polymorphism, Single Nucleotide
Publisher: Ovid Technologies Wolters Kluwer – American Heart Association
Year: 2014
DOI identifier: 10.1161/STROKEAHA.114.006096
OAI identifier:
Provided by: IUPUIScholarWorks

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