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J Clin Med. 2019 May 16;8(5). pii: E692. doi: 10.3390/jcm8050692.

Genome-Wide Association between the 2q33.1 Locus and Intracranial Aneurysm Susceptibility: An Updated Meta-Analysis Including 18,019 Individuals.

Hong EP1,2,3, Kim BJ4, Jeon JP5,6,7.

Author information

1
Molecular Neurogenetics Unit, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. ephong0305@gmail.com.
2
Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. ephong0305@gmail.com.
3
Institute of New Frontier Stroke Research, Hallym University College of Medicine, Chuncheon 24252, Korea. ephong0305@gmail.com.
4
Institute of New Frontier Stroke Research, Hallym University College of Medicine, Chuncheon 24252, Korea. luckykbj@naver.com.
5
Institute of New Frontier Stroke Research, Hallym University College of Medicine, Chuncheon 24252, Korea. jjs6553@daum.net.
6
Department of Neurosurgery, Hallym University College of Medicine, Chuncheon 24252, Korea. jjs6553@daum.net.
7
Genetic and Research Inc., Chuncheon 24252, Korea. jjs6553@daum.net.

Abstract

Previous genome-wide association studies did not show a consistent association between the BOLL gene (rs700651, 2q33.1) and intracranial aneurysm (IA) susceptibility. We aimed to perform an updated meta-analysis for the potential IA-susceptibility locus in large-scale multi-ethnic populations. We conducted a systematic review of studies identified by an electronic search from January 1990 to March 2019. The overall estimates of the "G" allele of rs700651, indicating IA susceptibility, were calculated under the fixed- and random-effect models using the inverse-variance method. Subsequent in silico function and cis-expression quantitative trait loci (cis-eQTL) analyses were performed to evaluate biological functions and genotype-specific expressions in human tissues. We included 4513 IA patients and 13,506 controls from five studies with seven independent populations: three European-ancestry, three Japanese, and one Korean population. The overall result showed a genome-wide significance threshold between rs700651 and IA susceptibility after controlling for study heterogeneity (OR = 1.213, 95% CI: 1.135-1.296). Subsequent cis-eQTL analysis showed significant genome-wide expressions in three human tissues, i.e., testis (p = 8.04 × 10-15 for ANKRD44), tibial nerves (p = 3.18 × 10-10 for SF3B1), and thyroid glands (p = 4.61 × 10-9 for SF3B1). The rs700651 common variant of the 2q33.1 region may be involved in genetic mechanisms that increase the risk of IA and may play crucial roles in regulatory functions.

KEYWORDS:

2q33.1; intracranial aneurysm; multi-ethnic meta-analysis; subarachnoid hemorrhage

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