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DNA Methylation in Depression and Depressive-Like Phenotype: Biomarker or Target of Pharmacological Intervention?

期刊

CURRENT NEUROPHARMACOLOGY
卷 20, 期 12, 页码 2267-2291

出版社

BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1570159X20666220201084536

关键词

Depression; DNA methylation; antidepressant; epigenetics; animal model; biomarker

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This narrative review focuses on the association between changes in DNA methylation patterns and major depressive disorder (MDD) or depressive-like phenotype in animal models, as well as mechanisms of response to antidepressant drugs. The evidence collected suggests that DNA methylation could serve as a promising epigenetic biomarker of pathology and help predict the efficacy of antidepressant treatment. Moreover, specific changes in DNA methylation signature may play a role in the etiopathogenesis and induction of antidepressant effects.
Major depressive disorder (MDD) is a debilitating psychiatric disorder, the third leading global cause of disability. Regarding aetiopathogenetic mechanisms involved in the onset of depressive disorders, the interaction between genetic vulnerability traits and environmental factors is believed to play a major role. Although much is still to be elucidated about the mechanisms through which the environment can interact with genetic background shaping the disease risk, there is a general agreement about a key role of epigenetic marking. In this narrative review, we focused on the association between changes in DNA methylation patterns and MDD or depressive-like phenotype in animal models, as well as mechanisms of response to antidepressant drugs. We discussed studies presenting DNA methylation changes at specific genes of interest and profiling analyses in both patients and animal models of depression. Overall, we collected evidence showing that DNA methylation could not only be considered as a promising epigenetic biomarker of pathology but could also help in predicting antidepressant treatment efficacy. Finally, we discussed the hypothesis that specific changes in DNA methylation signature could play a role in aetiopathogenetic processes as well as in the induction of antidepressant effect.

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