Dorsolateral Prefrontal Cortex and Subcallosal Cingulate Connectivity Show Preferential Antidepressant Response in...

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Trials

Background:

• Major depressive disorder (MDD) is linked to altered brain circuit connectivity, impacting treatment efficacy.
• Identifying predictors of antidepressant response is crucial for personalized medicine.

Purpose of the Study:

• To reanalyze archival data and identify moderators of sertraline treatment outcome versus placebo.
• To explore the role of functional brain connectivity in predicting antidepressant response.

Main Methods:

• Utilized magnetic resonance imaging (MRI) data from 279 participants in the EMBARC study.
• Computed seed-based functional connectivity using amygdala, DLPFC, subcallosal cingulate, and ventral striatum seeds.
• Employed principal component analysis and linear mixed effects models to identify treatment outcome moderators.

Main Results:

• Lower dorsolateral prefrontal cortex (DLPFC) connectivity was associated with greater improvement with sertraline compared to placebo (p = .05).
• A specific pattern of low DLPFC/subcallosal cingulate and high ventral striatum/amygdala connectivity yielded a 4.8-point greater reduction in depression scores with sertraline (p = .003).

Conclusions:

• Functional connectivity within DLPFC and subcallosal cingulate networks may predict favorable sertraline response.
• Brain connectivity patterns can serve as potential biomarkers for guiding antidepressant selection.