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.2015 Feb 1:172:453-61.
doi: 10.1016/j.jad.2014.10.004. Epub 2014 Oct 12.

Genome wide association study identifies variants in NBEA associated with migraine in bipolar disorder

Collaborators, Affiliations

Genome wide association study identifies variants in NBEA associated with migraine in bipolar disorder

Kaya K Jacobsen et al. J Affect Disord..

Abstract

Background: Migraine is a common comorbidity among individuals with bipolar disorder, but the underlying mechanisms for this co-occurrence are poorly understood. The aim of this study was to investigate the genetic background of bipolar patients with and without migraine.

Methods: We performed a genome-wide association analysis contrasting 460 bipolar migraneurs with 914 bipolar patients without migraine from the Bipolar Genome Study (BiGS).

Results: We identified one genome-wide significant association between migraine in bipolar disorder patients and rs1160720, an intronic single nucleotide polymorphism (SNP) in the NBEA gene (P=2.97 × 10(-8), OR: 1.82, 95% CI: 1.47-2.25), although this was not replicated in a smaller sample of 289 migraine cases.

Limitations: Our study is based on self-reported migraine.

Conclusions: NBEA encodes neurobeachin, a scaffolding protein primarily expressed in the brain and involved in trafficking of vesicles containing neurotransmitter receptors. This locus has not previously been implicated in migraine per se. We found no evidence of association in data from the GWAS migraine meta-analysis consortium (n=118,710 participants) suggesting that the association might be specific to migraine co-morbid with bipolar disorder.

Keywords: Bipolar disorder; Genetics; Migraine; NBEA; Neurobeachin.

Copyright © 2014 The Authors. Published by Elsevier B.V. All rights reserved.

PubMed Disclaimer

Conflict of interest statement

Conflicts of interest: None of the authors report any conflict of interest.

Figures

Figure 1
Figure 1
Quantile-Quantile plot (QQ-plot) of observed and expected P-values, -log transformed. The genetic inflation factor (λ) was 1. The dashed horizontal line indicates a p-value of 5×10-8. The grey shading indicates a 95% Confidence Interval.
Figure 2
Figure 2
Manhattan plot of results of logistical regression analyses. Chromosomes are pictured along the x-axis in alternating colors. −log10 P-values are plotted on y-axis. Red line indicates genome wide significance at 5×10-8. A locus on chromosome 13 surpasses the threshold for genome wide significance.
Figure 3
Figure 3
LocusZoom plot of the candidate region on chromosome 13. Imputed SNPs are shown as circles, directly genotyped SNPs as diamonds. The color scheme indicates linkage disequilibrium (LD) structure across the region. The blue line indicates recombination rate. P-values are −log transformed. The top SNPs are in intronic regions of neurobeachin (NBEA). Rs1160720 is marked by a purple diamond (P-value 2.97×10-8, OR: 1.82, 95% CI: 1.47-2.25).
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