High Precision DNA Modification Analysis of HCG9 in Major Psychosis
Mrinal Pal1, Sasha Ebrahimi1, Gabriel Oh1
1Krembil Family Epigenetics Laboratory, Campbell Family Mental Health Research Institute, CAMH, Toronto, Ontario M5T 1R8, Canada;
Schizophrenia Bulletin
|June 17, 2015
Summary
New epigenetic analysis of major psychosis brains reveals significant DNA modification differences in patients with schizophrenia and bipolar disorder, highlighting potential causes.
Area of Science:
- Neuroscience
- Genetics
- Epigenetics
Background:
- Major psychosis, including schizophrenia and bipolar disorder, has complex etiopathogenic mechanisms.
- Epigenetic modifications, such as DNA methylation, are increasingly recognized as potential contributors to psychiatric disorders.
Purpose of the Study:
- To investigate DNA modifications in the HLA complex group 9 (nonprotein coding) gene in postmortem brains of individuals with schizophrenia or bipolar disorder compared to controls.
- To explore epigenetic age effects and strand-specific DNA modifications in these patient populations.
Main Methods:
- Padlock probe-based ultra-deep bisulfite sequencing was employed for fine mapping of modified cytosines.
- Analysis focused on the HLA complex group 9 (nonprotein coding) gene in postmortem brain tissue.
- Comparison of DNA modification patterns between patients with major psychosis and unaffected controls.
Main Results:
- Significant differences in CpG and CpH modifications were detected between patients and controls.
- Epigenetic age effects and strand-specific DNA modification differences were identified.
- DNA modification data demonstrated utility in clustering patient populations.
Conclusions:
- The study reveals novel epigenetic complexities in major psychosis.
- DNA modification analysis offers a promising approach to understanding the heterogeneous causes of psychiatric diseases.
