Cited by 23Treatment of Major DepressionEpigenetics and DNA MethylationStress Responses and Cortisol

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The Molecular Basis of Depression: Implications of Sex-Related Differences in Epigenetic Regulation

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Kawatake-Kuno, Ayako, Murai, Toshiya, Uchida, Shusaku·2021·Frontiers in Molecular Neuroscience

Abstract

Major depressive disorder (MDD) is a leading cause of disability worldwide. Although the etiology and pathophysiology of MDD remain poorly understood, aberrant neuroplasticity mediated by the epigenetic dysregulation of gene expression within the brain, which may occur due to genetic and environmental factors, may increase the risk of this disorder. Evidence has also been reported for sex-related differences in the pathophysiology of MDD, with female patients showing a greater severity of symptoms, higher degree of functional impairment, and more atypical depressive symptoms. Males and females also differ in their responsiveness to antidepressants. These clinical findings suggest that sex-dependent molecular and neural mechanisms may underlie the development of depression and the actions of antidepressant medications. This review discusses recent advances regarding the role of epigenetics in stress and depression. The first section presents a brief introduction of the basic mechanisms of epigenetic regulation, including histone modifications, DNA methylation, and non-coding RNAs. The second section reviews their contributions to neural plasticity, the risk of depression, and resilience against depression, with a particular focus on epigenetic modulators that have causal relationships with stress and depression in both clinical and animal studies. The third section highlights studies exploring sex-dependent epigenetic alterations associated with susceptibility to stress and depression. Finally, we discuss future directions to understand the etiology and pathophysiology of MDD, which would contribute to optimized and personalized therapy.

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Crossref · 10.3389/fnmol.2021.708004

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Figure 1 Schematic diagram of the etiology and pathophysiology of psychiatric disorders. Genetic and environmental factors and their interactions modulate brain gene expression in the brain via epigenetic mechanisms. This would lead to circuit dysfunction caused by aberrant synaptic, neural, and structural plasticity, and induce the expression of a variety of symptoms. AAD, alcohol abuse; ASD, autism spectrum disorder; BPD, bipolar disorder; MDD, major depression; SCZ, schizophrenia.
Figure 1 Schematic diagram of the etiology and pathophysiology of psychiatric disorders. Genetic and environmental factors and their interactions modulate brain gene expression in the brain via epigenetic mechanisms. This would lead to circuit dysfunction caused by aberrant synaptic, neural, and structural plasticity, and induce the expression of a variety of symptoms. AAD, alcohol abuse; ASD, autism spectrum disorder; BPD, bipolar disorder; MDD, major depression; SCZ, schizophrenia.CC BY · PubMed Central
Figure 2 Epigenetic regulation of gene expression. Gene expression is regulated by posttranslational modification of histones, DNA methylation, and the actions of non-coding RNAs. DNMTs; DNA methyltransferases; HATs, histone acetyltransferases; HDACs, histone deacetylases; HDMs, histone demethylases; HMTs, histone methyltransferases; lncRNA, long non-coding RNA.; miRNA, microRNA; TETs, ten-eleven translocation.
Figure 2 Epigenetic regulation of gene expression. Gene expression is regulated by posttranslational modification of histones, DNA methylation, and the actions of non-coding RNAs. DNMTs; DNA methyltransferases; HATs, histone acetyltransferases; HDACs, histone deacetylases; HDMs, histone demethylases; HMTs, histone methyltransferases; lncRNA, long non-coding RNA.; miRNA, microRNA; TETs, ten-eleven translocation.CC BY · PubMed Central
Figure 3 Examples of aberrant epigenetic modifications associated with neuroplasticity, stress, and depression observed in patients with major depressive disorder and/or suicide victims and in animal models of depression.
Figure 3 Examples of aberrant epigenetic modifications associated with neuroplasticity, stress, and depression observed in patients with major depressive disorder and/or suicide victims and in animal models of depression.CC BY · PubMed Central

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Metadata

Authors
Kawatake-Kuno, A., Murai, T., & Uchida, S.
Affiliations
Kyoto University (JP)
Corresponding author
Uchida, Shusaku
Venue
Frontiers in Molecular Neuroscience
Published
2021-07-01
Volume
14
Pages
708004-708004
ISSN
1662-5099 (ISSN-L)
OpenAlex
W3182076372
Cited by
23
References
251
Citations by year
2026: 4 · 2025: 5 · 2024: 5 · 2023: 3 · 2022: 4 · 2021: 2
FWCI
2.04
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Molecular Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Japan Society for the Promotion of Science
  • Japan Agency for Medical Research and Development
  • Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Health Sciences › Medicine › Pharmacology (medical) › Treatment of Major Depression
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
major depressive disorder, sex differences, epigenetic regulation, DNA methylation, histone modifications, non-coding RNA, neuroplasticity, stress, antidepressant response, depression resilience, depression vulnerability, personalized treatment

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