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Protein Interaction Networks Link Schizophrenia Risk Loci to Synaptic Function.
Emanuel Schwarz1, Rauf Izmailov2, Pietro Liò3
1Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
Schizophrenia Bulletin
|April 9, 2016
Summary
Schizophrenia genetics linked to synaptic function. Network analysis of protein-protein interactions reveals key genes involved in synaptic transmission and ion transport, offering new drug development targets.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Schizophrenia is a severe psychiatric disorder with high heritability, affecting about 1% of the population.
- Genome-wide association studies (GWAS) have identified numerous genetic loci associated with schizophrenia risk, but their functional roles remain unclear.
Purpose of the Study:
- To elucidate the functional importance of genetic loci associated with schizophrenia risk.
- To identify biological functions and pathways implicated by schizophrenia-associated genetic variants using network analysis.
Main Methods:
- Developed a novel network analysis strategy utilizing protein-protein interaction (PPI) data.
- Inferred biological functions associated with genetic variants strongly linked to schizophrenia risk.
- Analyzed brain gene expression patterns during development and in adult schizophrenia patients.
Main Results:
- Schizophrenia risk loci are significantly associated with synaptic transmission and ion transmembrane transport.
- These associations were not found with previously identified shared psychiatric illness ontological categories.
- Risk-linked genes show significant expression modulation during birth and altered expression in adult schizophrenia patients' brains.
Conclusions:
- Synaptic function is a key, developmentally determined process in schizophrenia, supported by associated genetic variants and PPI networks.
- The identified synaptic genes represent potential targets for future mechanistic studies and therapeutic interventions in schizophrenia.
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