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Published on: June 15, 2011
Multiple Rare Risk Coding Variants in Postsynaptic Density-Related Genes Associated With Schizophrenia Susceptibility
Tsung-Ming Hu1,2, Ying-Chieh Wang1, Chia-Liang Wu1,3
1Department of Psychiatry, Yuli Branch, Taipei Veterans General Hospital, Hualien, Taiwan.
Rare mutations in postsynaptic density (PSD)-related genes, particularly neuroligin (NLGN), SHANK, and disks large-associated protein (DLGAP) families, may contribute to schizophrenia by altering protein expression.
Area of Science:
- Neurobiology
- Genetics
- Molecular Biology
Background:
- Schizophrenia is a neurobiological disorder characterized by abnormal synaptic connectivity.
- Postsynaptic density (PSD)-related proteins are vital for synaptic transmission and receptor function.
Purpose of the Study:
- To investigate the role of PSD-related genes in schizophrenia susceptibility.
- To identify rare mutations within specific gene families associated with schizophrenia.
Main Methods:
- Resequencing of 18 PSD-related genes (DLGAP, HOMER, NLGN, neurexin, SHANK) in 98 schizophrenia patients.
- Analysis of identified rare mutations using bioinformatics, immunoblotting, and immunocytochemistry.
Main Results:
- Identified 50 missense heterozygous mutations in schizophrenia patients.
- Ten mutations were novel and absent in control populations.
- Eight mutants showed altered protein expression in cell cultures.
Conclusions:
- Rare functional mutations in PSD-related genes (NLGN, SHANK, DLGAP) may impact protein expression in schizophrenia.
- These findings support the contribution of rare coding variants to schizophrenia's genetic architecture.
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