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Bipolar disorder with binge eating behavior: a genome-wide association study implicates PRR5-ARHGAP8.
- Source :
-
Translational psychiatry [Transl Psychiatry] 2018 Feb 02; Vol. 8 (1), pp. 40. Date of Electronic Publication: 2018 Feb 02. - Publication Year :
- 2018
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Abstract
- Bipolar disorder (BD) is associated with binge eating behavior (BE), and both conditions are heritable. Previously, using data from the Genetic Association Information Network (GAIN) study of BD, we performed genome-wide association (GWA) analyses of BD with BE comorbidity. Here, utilizing data from the Mayo Clinic BD Biobank (969 BD cases, 777 controls), we performed a GWA analysis of a BD subtype defined by BE, and case-only analysis comparing BD subjects with and without BE. We then performed a meta-analysis of the Mayo and GAIN results. The meta-analysis provided genome-wide significant evidence of association between single nucleotide polymorphisms (SNPs) in PRR5-ARHGAP8 and BE in BD cases (rs726170 OR = 1.91, P = 3.05E-08). In the meta-analysis comparing cases with BD with comorbid BE vs. non-BD controls, a genome-wide significant association was observed at SNP rs111940429 in an intergenic region near PPP1R2P5 (p = 1.21E-08). PRR5-ARHGAP8 is a read-through transcript resulting in a fusion protein of PRR5 and ARHGAP8. PRR5 encodes a subunit of mTORC2, a serine/threonine kinase that participates in food intake regulation, while ARHGAP8 encodes a member of the RhoGAP family of proteins that mediate cross-talk between Rho GTPases and other signaling pathways. Without BE information in controls, it is not possible to determine whether the observed association reflects a risk factor for BE in general, risk for BE in individuals with BD, or risk of a subtype of BD with BE. The effect of PRR5-ARHGAP8 on BE risk thus warrants further investigation.
- Subjects :
- Adolescent
Adult
Aged
Aged, 80 and over
Biological Specimen Banks
Bipolar Disorder epidemiology
Bipolar Disorder physiopathology
Bulimia epidemiology
Case-Control Studies
Comorbidity
Female
Humans
Intracellular Signaling Peptides and Proteins
Male
Meta-Analysis as Topic
Middle Aged
Polymorphism, Single Nucleotide
Young Adult
Bipolar Disorder genetics
Bulimia genetics
Carrier Proteins genetics
GTPase-Activating Proteins genetics
Genome-Wide Association Study
Subjects
Details
- Language :
- English
- ISSN :
- 2158-3188
- Volume :
- 8
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Translational psychiatry
- Publication Type :
- Academic Journal
- Accession number :
- 29391396
- Full Text :
- https://doi.org/10.1038/s41398-017-0085-3