Age-related regional homogeneity changes in first-episode major depressive disorder: a REST-meta-MDD project study

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Major depressive disorder (MDD) is linked to altered spontaneous brain activity.
• Regional homogeneity (ReHo), a measure of neuronal synchronization, is frequently studied in MDD.
• Age-related variations in ReHo within MDD remain largely unexplored.

Purpose of the Study:

• To investigate age-specific alterations in ReHo in first-episode MDD patients.
• To examine the interaction between age and disease on ReHo patterns.
• To assess the diagnostic potential of ReHo as a biomarker for MDD across different age groups.

Main Methods:

• Analysis of ReHo in first-episode MDD patients from the REST-meta-MDD project.
• Stratification of patients into young (16-24), adult (25-39), and middle-aged (40-54) subgroups.
• Utilized Receiver Operating Characteristic (ROC) analysis to evaluate diagnostic potential.

Main Results:

• Distinct age-specific ReHo alterations were identified in young, adult, and middle-aged MDD patients.
• Progressive age-related ReHo decline observed in specific brain regions.
• Significant disease effects and age-by-disease interactions noted in several brain areas.
• ROC analysis demonstrated robust diagnostic potential for ReHo patterns in adult and middle-aged groups.

Conclusions:

• ReHo exhibits dynamic, age-dependent characteristics in first-episode MDD.
• ReHo patterns show promise as a biomarker for MDD across the lifespan.
• Findings highlight the importance of considering age in understanding MDD pathophysiology and potential biomarkers.