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Molecular genetics of bipolar disorder
1Laboratory for Molecular Dynamics of Mental Disorders, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako-shi, 351-0198, Saitama, Japan. kato@brain.riken.go.jp
Neuroscience Research
|May 30, 2001
Summary
Genetic factors in bipolar disorder are being investigated, focusing on monoaminergic neurotransmission and candidate genes. Research explores gene regulation, intracellular signaling, and chromosomal abnormalities to understand the molecular basis of this mood disorder.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Bipolar disorder (manic-depressive illness) pathophysiology involves alterations in monoaminergic neurotransmission.
- Candidate genes, including serotonin transporter and monoamine oxidase A, are investigated for their association with bipolar disorder.
- Intracellular signal transduction molecules and gene regulating regions are areas of active research.
Purpose of the Study:
- To review the current understanding of the molecular genetics of bipolar disorder.
- To highlight candidate genes, chromosomal loci, and genetic mechanisms implicated in bipolar disorder.
- To identify areas for future research in the genetic basis of bipolar disorder.
Main Methods:
- Review of 13 whole genome positional cloning studies.
- Analysis of candidate genes and their regulatory regions.
- Investigation of genetic mutations in comorbid disorders (e.g., Wolfram syndrome, Darier's disease).
- Examination of genetic transmission patterns, including anticipation and parent-of-origin effects.
- Exploration of mitochondrial DNA association and genomic imprinting.
Main Results:
- Multiple candidate loci have been identified through genome-wide studies.
- Specific genes like DISC1, DISC2, WFS1, and ATP2A2 have been cloned or identified with potential roles.
- Evidence suggests potential roles for extended CTG repeats, mitochondrial DNA, and genomic imprinting, though some findings require further validation.
Conclusions:
- The molecular genetics of bipolar disorder is complex, involving multiple genes and genetic mechanisms.
- Continued research into candidate genes, genetic pathways, and inheritance patterns is crucial.
- Further investigation is warranted to fully elucidate the genetic underpinnings of bipolar disorder.