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[Gene-gene interaction between DNMT3B and DRD1 in schizophrenia]
Chen Zhang1, Bin Xie, Ya-Song DU
1Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China.
Zhonghua Yi Xue Za Zhi
|January 8, 2011
Summary
Gene-gene interactions between DNA methyltransferase 3 beta (DNMT3B) and dopamine receptor D1 (DRD1) may increase schizophrenia risk. Specific single nucleotide polymorphisms (SNPs) in DNMT3B and DRD1 were significantly associated with schizophrenia in this study.
Area of Science:
- Genetics
- Neuroscience
- Psychiatry
Background:
- Schizophrenia is a complex psychiatric disorder with a significant genetic component.
- Understanding gene-gene interactions is crucial for elucidating the genetic architecture of schizophrenia.
Purpose of the Study:
- To investigate the potential gene-gene interaction between DNMT3B and DRD1 in relation to schizophrenia risk.
- To identify specific single nucleotide polymorphisms (SNPs) within these genes that contribute to schizophrenia susceptibility.
Main Methods:
- Genotyping of two SNPs in DNMT3B (rs2424908, rs6119954) and five SNPs in DRD1 (rs4532, rs5326, rs2168631, rs6882300, rs267418) in 365 schizophrenia patients and 365 healthy controls.
- Analysis of gene-gene interactions using Multifactor Dimensionality Reduction (MDR) software.
Main Results:
- The genotype frequency of rs6119954 in DNMT3B was significantly higher in patients compared to controls (P = 0.018).
- MDR analysis identified significant interactions involving combinations of SNPs from both DNMT3B and DRD1, including rs6119954-rs267418 (OR=1.79, P=0.0004), rs6119954-rs5326-rs267418 (OR=2.36, P<0.0001), and rs2424908-rs6119954-rs5326-rs267418 (OR=3.08, P<0.0001).
Conclusions:
- A significant gene-gene interaction between DNMT3B and DRD1 appears to contribute to the risk of developing schizophrenia.
- These findings highlight the importance of considering epistatic effects in the genetic etiology of schizophrenia.
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