Epigenetic Age Acceleration Was Delayed in Schizophrenia

Area of Science:

• Neuroscience
• Genetics
• Aging Research

Background:

• Schizophrenia is a neuropsychiatric disorder characterized by abnormal neurodevelopmental trajectories.
• The accelerated aging hypothesis in schizophrenia lacks conclusive quantitative evidence.
• Understanding physiological trajectory disruptions is crucial for schizophrenia research.

Purpose of the Study:

• To quantitatively assess epigenetic age acceleration in schizophrenia using epigenetic clocks.
• To investigate epigenetic age differences in blood and brain tissues between patients and controls.
• To explore the role of epigenetic clock genes in schizophrenia pathogenesis.

Main Methods:

• Utilized three epigenetic clock methods to measure epigenetic age.
• Analyzed large sample sizes of whole blood and brain tissue from schizophrenia patients and controls.
• Examined gene expression, methylation patterns, and leukocyte composition.

Main Results:

• Significant positive correlations between epigenetic and chronological age were observed in both groups and tissues.
• Epigenetic age acceleration was significantly delayed in schizophrenia patients' blood and frontal cortex tissues.
• Schizophrenia-associated genes were linked to epigenetic clock regulation, showing differential expression and methylation.

Conclusions:

• Schizophrenia is associated with a skewed epigenetic clock, supporting a neurodevelopmental model.
• Delayed epigenetic aging in peripheral blood suggests potential for epigenetic clock genes as biomarkers.
• Findings highlight the value of epigenetic clocks in understanding schizophrenia's physiological impact.