Rare structural variants disrupt multiple genes in neurodevelopmental pathways in schizophrenia
Tom Walsh1, Jon M McClellan, Shane E McCarthy
1Department of Medicine, University of Washington, Seattle, WA 98195, USA.
Science (New York, N.Y.)
|March 29, 2008
Summary
Rare structural genetic variants contribute to schizophrenia risk. These mutations impact neurodevelopmental pathways, offering new insights into the disorder
Area of Science:
- Genetics
- Neuroscience
- Psychiatry
Background:
- Schizophrenia is a complex neurodevelopmental disorder with poorly understood genetic underpinnings.
- Genetic factors are implicated, but specific causative variants remain largely elusive.
Purpose of the Study:
- To investigate the role of rare structural genetic variants in schizophrenia.
- To identify specific genes and pathways disrupted by these variants.
Main Methods:
- Microarray comparative genomic hybridization (aCGH) was used to analyze DNA from individuals with schizophrenia and controls.
- Variants were validated using high-resolution platforms.
- Gene disruption analysis focused on neurodevelopmental signaling pathways.
Main Results:
- Rare microdeletions and microduplications (>100 kb) were significantly more frequent in individuals with schizophrenia (15%) compared to controls (5%).
- This association was particularly pronounced in young-onset schizophrenia (20%) and independently replicated.
- Disrupted genes were disproportionately involved in neuregulin and glutamate signaling pathways crucial for neurodevelopment.
Conclusions:
- Individually rare structural variants are significant contributors to schizophrenia susceptibility.
- These variants disrupt critical neurodevelopmental pathways, providing a genetic basis for the disorder.
- Findings highlight the importance of rare variants in understanding complex psychiatric conditions.
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