Brain-specific epigenetic markers of schizophrenia

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Epigenetics, specifically DNA methylation, is implicated in schizophrenia.
• Previous genome-wide methylation studies in human prefrontal cortex (PFC) identified thousands of differentially methylated sites in schizophrenia patients.

Purpose of the Study:

• To identify consistently differentially methylated regions (DMRs) across multiple datasets for greater biological significance.
• To pinpoint key epigenetic factors contributing to schizophrenia etiology and neurodevelopment.

Main Methods:

• Analysis of three independent post-mortem PFC methylation datasets from schizophrenia patients.
• Utilized the bumphunter function from the Bioconductor package minfi to identify consistently differentially methylated regions.

Main Results:

• Identified seven DMRs consistently associated with schizophrenia across all analyzed cohorts.
• These regions are located near genes including CERS3, DPPA5, PRDM9, DDX43, REC8, LY6G5C, and a region on chromosome 10.
• PRDM9, a histone methyltransferase crucial for meiotic recombination, was among the identified genes of interest.

Conclusions:

• The seven identified DMRs represent key epigenetic alterations in schizophrenia.
• These findings suggest a significant role for these specific epigenetic modifications in the pathophysiology of schizophrenia and normal brain development.