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Genome-wide association study identifies 30 loci associated with bipolar disorder

  • eQTLGen Consortium
  • , BIOS Consortium
  • , the Bipolar Disorder Working Group of the Psychiatric Genomics Consortium
  • Icahn School of Medicine at Mount Sinai
  • Broad Institute
  • Medical Research Council
  • King's College London
  • University of Basel
  • University of Bonn
  • University of Marburg
  • University College London
  • Charité – Universitätsmedizin Berlin
  • Massachusetts General Hospital
  • Aarhus University
  • Karolinska Institutet
  • University of Würzburg
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  • Mental Health Services Capital Region of Denmark
  • University of Oslo
  • Vrije Universiteit Amsterdam
  • deCODE genetics
  • University of Queensland
  • Boston Children's Hospital
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  • University of Michigan, Ann Arbor
  • IRCCS Istituto di ricerche farmacologiche Mario Negri - Milano, Bergamo, Ranica
  • The University of Chicago
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  • Rush University Medical Center
  • Statens Serum Institut
  • Cornell University
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  • Washington University St. Louis
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  • University of Iceland
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  • Federal Institute for Drugs and Medical Devices (BfArM)
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  • University of Melbourne
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  • Amsterdam UMC
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  • Indiana University Bloomington

Research output: Contribution to journalArticlepeer-review

Abstract

Bipolar disorder is a highly heritable psychiatric disorder. We performed a genome-wide association study (GWAS) including 20,352 cases and 31,358 controls of European descent, with follow-up analysis of 822 variants with P < 1 × 10 −4 in an additional 9,412 cases and 137,760 controls. Eight of the 19 variants that were genome-wide significant (P < 5 × 10 −8 ) in the discovery GWAS were not genome-wide significant in the combined analysis, consistent with small effect sizes and limited power but also with genetic heterogeneity. In the combined analysis, 30 loci were genome-wide significant, including 20 newly identified loci. The significant loci contain genes encoding ion channels, neurotransmitter transporters and synaptic components. Pathway analysis revealed nine significantly enriched gene sets, including regulation of insulin secretion and endocannabinoid signaling. Bipolar I disorder is strongly genetically correlated with schizophrenia, driven by psychosis, whereas bipolar II disorder is more strongly correlated with major depressive disorder. These findings address key clinical questions and provide potential biological mechanisms for bipolar disorder.

Original languageEnglish
Pages (from-to)793-803
Number of pages11
JournalNature Genetics
Volume51
Issue number5
DOIs
Publication statusPublished - 1 May 2019
Externally publishedYes

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