GAD1 mRNA Expression and DNA Methylation in Schizophrenia
Author Information
Author(s): Huang Hsien-Sung, Akbarian Schahram
Primary Institution: University of Massachusetts Medical School
Hypothesis
Decreased GAD1 mRNA expression in schizophrenia is associated with increased DNA methylation.
Conclusion
Schizophrenia subjects show a significant decrease in DNA methylation at the GAD1 promoter compared to controls.
Supporting Evidence
- Subjects with schizophrenia showed an average 8-fold deficit in repressive chromatin-associated DNA methylation at the GAD1 promoter.
- Levels of GAD1 DNA methylation in open chromatin were similar between schizophrenia subjects and controls.
- Significant differences in DNA methylation frequencies were observed at the GAD1 promoter between schizophrenia subjects and controls.
Takeaway
This study looked at how a gene related to brain function is changed in people with schizophrenia, finding that a specific type of chemical change in DNA is less in those with the condition.
Methodology
The study used a case-control design to analyze DNA methylation patterns in open and repressive chromatin from postmortem human prefrontal cortex.
Limitations
Reliable PCR amplification was only achieved for a limited number of GAD1 CpGs, and the role of other CpG sites remains unclear.
Participant Demographics
14 schizophrenia subjects matched with 14 controls for age and gender.
Statistical Information
P-Value
0.018
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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