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Genome-wide association analysis identifies 13 new risk loci for schizophrenia
Stephan Ripke1, Colm O'Dushlaine, Kimberly Chambert
11] Analytical and Translational Genetics Unit, Massachusetts General Hospital, Boston, Massachusetts, USA. [2] Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA. [3].
Nature Genetics
|August 27, 2013
Summary
This large genome-wide study identified 22 genetic loci for schizophrenia, including 13 novel regions. Common genetic variations significantly contribute to schizophrenia risk, impacting at least 32% of liability variance.
Area of Science:
- Genetics
- Psychiatry
- Neuroscience
Background:
- Schizophrenia is a complex mental disorder with a significant heritable component.
- It poses a substantial public health challenge globally.
- Understanding its genetic underpinnings is crucial for etiology and treatment.
Purpose of the Study:
- To identify genetic loci associated with schizophrenia through a multi-stage genome-wide association study (GWAS).
- To investigate the role of common genetic variation in schizophrenia risk.
- To explore candidate genes and biological pathways implicated in the disorder.
Main Methods:
- A multi-stage GWAS approach was employed, starting with a Swedish national sample.
- Meta-analysis was conducted with previous schizophrenia GWAS data.
- Single Nucleotide Polymorphisms (SNPs) were replicated in independent samples and parent-offspring trios.
Main Results:
- Twenty-two loci were identified at genome-wide significance, with 13 being novel discoveries.
- One locus was previously associated with bipolar disorder.
- Candidate genes at identified loci suggest a role for neuronal calcium signaling.
- An estimated 8,300 independent SNPs contribute to schizophrenia risk, explaining at least 32% of liability variance.
Conclusions:
- Common genetic variation plays a significant role in the etiology of schizophrenia.
- The findings highlight neuronal calcium signaling pathways as potentially important.
- Larger genetic studies are needed for a more comprehensive understanding of schizophrenia's genetic architecture.
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