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Genetics of affective (mood) disorders
1Department of Psychological Medicine, The Henry Wellcome Building for Biomedical Research in Wales, Wales School of Medicine, Cardiff University, Heath Park, Cardiff, UK. craddockn@cardiff.ac.uk
European Journal of Human Genetics : EJHG
|May 25, 2006
Summary
Identifying genetic susceptibility for mood disorders like bipolar disorder and unipolar depression is crucial. Research points to genes such as BDNF and DAOA, but requires further replication and study of gene-environment interactions.
Area of Science:
- Psychiatric Genetics
- Molecular Psychiatry
- Neuroscience
Background:
- Mood disorders, including bipolar and unipolar depression, represent a significant public health concern.
- These disorders exhibit substantial heritability, indicating a strong genetic component.
- Previous research has primarily focused on bipolar disorder, with increasing attention on unipolar depression.
Purpose of the Study:
- To identify specific genes associated with susceptibility to mood disorders.
- To explore the genetic overlap between mood disorders and schizophrenia.
- To investigate potential gene-environment interactions in the development of psychiatric conditions.
Main Methods:
- Utilizing positional and functional molecular genetic approaches.
- Conducting linkage studies to identify regions of interest on chromosomes.
- Analyzing candidate genes, including BDNF and DAOA, for their role in mood disorders.
Main Results:
- Several chromosomal regions of interest have been identified through linkage studies.
- Preliminary evidence implicates specific genes, notably BDNF (Brain-Derived Neurotrophic Factor) and DAOA (D-amino acid oxidase activator), in mood disorder susceptibility.
- Accumulating evidence suggests a shared genetic basis between schizophrenia and mood disorders.
- Indications of gene-environment interactions influencing psychiatric phenotypes have been observed.
Conclusions:
- Further replication studies are essential to confirm the role of identified genes like BDNF and DAOA.
- Detailed investigation into the phenotypic relationships and biological mechanisms underlying these genetic associations is required.
- The complexity of psychiatric disorders is highlighted by genetic overlaps and gene-environment interactions, necessitating integrated research approaches.