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


ABSTRACT: 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.

SUBMITTER: Foroud T 

PROVIDER: S-EPMC4213281 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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

Foroud Tatiana T   Lai Dongbing D   Koller Daniel D   Van't Hof Femke F   Kurki Mitja I MI   Anderson Craig S CS   Brown Robert D RD   Connolly Edward Sander ES   Eriksson Johan G JG   Flaherty Matthew M   Fornage Myriam M   von Und Zu Fraunberg Mikael M   Gaál Emília I EI   Laakso Aki A   Hernesniemi Juha J   Huston John J   Jääskeläinen Juha E JE   Kiemeney Lambertus A LA   Kivisaari Riku R   Kleindorfer Dawn D   Ko Nerissa N   Lehto Hanna H   Mackey Jason J   Meissner Irene I   Moomaw Charles J CJ   Mosley Thomas H TH   Moskala Marek M   Niemelä Mika M   Palotie Aarno A   Pera Joanna J   Rinkel Gabriel G   Ripke Stephan S   Rouleau Guy G   Ruigrok Ynte Y   Sauerbeck Laura L   Słowik Agnieszka A   Vermeulen Sita H SH   Woo Daniel D   Worrall Bradford B BB   Broderick Joseph J  

Stroke 20140925 11


<h4>Background and purpose</h4>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.<h4>Methods</h4>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  ...[more]

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