This scoping review systematically maps and synthesizes research examining DNA methylation changes occurring before and after psychotherapy across psychiatric and psychological conditions. The review evaluates whether genes identified in psychotherapy-related epigenetic studies converge on meaningful biological pathways, such as systems involved in stress regulation, immune functioning, and neuroplasticity. Both candidate-gene and methylome-wide studies will be included, with analytic strategies tailored to each study type to determine when pathway-level interpretation is empirically justified. Findings will also be examined in relation to methodological features such as tissue type, assay strategy, timing of measurement, and psychotherapy modality. By identifying convergent biological systems and methodological gaps, the review aims to clarify how sustained psychosocial interventions may influence biological processes relevant to mental health.
Daniel Lin, MD PhD MHS
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