Cited by 407Bipolar Disorder and TreatmentGenetic Associations and EpidemiologySchizophrenia research and treatment

The genetics of bipolar disorder

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Barnett, J.H., Smoller, J.W.·2009·Neuroscience

Abstract

Bipolar disorder is a mood disorder characterized by impairing episodes of mania and depression. Twin studies have established that bipolar disorder is among the most heritable of medical disorders and efforts to identify specific susceptibility genes have intensified over the past two decades. The search for genes influencing bipolar disorder has been complicated by a paucity of animal models, limited understanding of pathogenesis, and the genetic and phenotypic complexity of the syndrome. Linkage studies have implicated several chromosomal regions as harboring relevant genes, but results have been inconsistent. It is now widely accepted that the genetic liability to bipolar disorder reflects the action of many genes of individually small effect, a scenario for which linkage studies are poorly suited. Thus, association studies, which are more powerful for the detection of modest effect loci, have become the focus of gene-finding research. A large number of candidate genes, including biological candidates derived from hypotheses about the pathogenesis of the disorder and positional candidates derived from linkage and cytogenetic studies, have been evaluated. Several of these genes have been associated with the disorder in independent studies (including BDNF, DAOA, DISC1, GRIK4, SLC6A4, and TPH2), but none has been established. The clinical heterogeneity of bipolar disorder and its phenotypic and genetic overlap with other disorders (especially schizophrenia, schizoaffective disorder, and major depressive disorder) have raised questions about the optimal phenotype definition for genetic studies. Nevertheless, genomewide association analysis, which has successfully identified susceptibility genes for a variety of complex disorders, has begun to implicate specific genes for bipolar disorder (DGKH, CACNA1C, ANK3). The polygenicity of the disorder means that very large samples will be needed to detect the modest effect loci that likely contribute to bipolar disorder. Detailed genetic dissection of the disorder may provide novel targets (both pharmacologic and psychosocial) for intervention.

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  1. McQueen MB Devlin B Faraone SV Nimgaonkar VL Sklar P Smoller JW Abou Jamra R Albus M Bacanu SA Baron M Barrett TB Berrettini W Blacker D Byerley W Cichon S Coryell W Craddock N Daly MJ Depaulo JR Edenberg HJ Foroud T Gill M Gilliam TC Hamshere M Jones I Jones L Juo SH Kelsoe JR Lambert D Lange C Lerer B Liu J Maier W Mackinnon JD McInnis MG McMahon FJ Murphy DL Nothen MM Nurnberger JI Pato CN Pato MT Potash JB Propping P Pulver AE Rice JP Rietschel M Scheftner W Schumacher J Segurado R Van Steen K Xie W Zandi PP Laird NM Combined Analysis from Eleven Linkage Studies of Bipolar Disorder Provides Strong Evidence of Susceptibility Loci on Chromosomes 6q and 8q Am J Hum Genet 77 2005b PMC1275607 16175504

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Authors
Barnett, J. H., & Smoller, J. W.
Affiliations
  • University of Cambridge (GB)
  • Massachusetts General Hospital (US)
Corresponding author
Smoller, J.W.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2009-11
Volume
164
Issue
1
Pages
331-343
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2008741245
Cited by
407
References
147
Citations by year
2026: 13 · 2025: 21 · 2024: 21 · 2023: 19 · 2022: 19 · 2021: 40 · 2020: 26 · 2019: 41 · 2018: 19 · 2017: 20 · 2016: 28 · 2015: 18 · 2014: 25 · 2013: 21 · 2012: 26
FWCI
3.15
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (R01MH079799)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
bipolar disorder, genetic susceptibility, heritability, candidate genes, genome-wide association study, polygenic liability, CACNA1C, ANK3, brain-derived neurotrophic factor, DAOA, DISC1, GRIK4, serotonin transporter, tryptophan hydroxylase 2, schizophrenia, schizoaffective disorder, major depressive disorder, phenotype definition, genetic heterogeneity
MeSH terms
Animals, Bipolar Disorder, Humans, Genetic Predisposition to Disease

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