Cited by 19Treatment of Major DepressionGenetic Associations and EpidemiologyTryptophan and brain disorders

Advancing depression management through biomarker discovery with a focus on genetic and epigenetic aspects: a comprehensive study on neurobiological, neuroendocrine, metabolic, and inflammatory pathways

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Milic, Jelena, Jovic, Sladjana, Sapic, Rosa·2025·Genes

Abstract

Introduction: Depression is a pervasive global health issue, affecting millions worldwide and causing significant disability. Despite its prevalence, current diagnostic and treatment approaches often yield suboptimal outcomes. The complexity of depression, characterized by diverse causes and symptoms, highlights the urgent need for advanced diagnostic tools and personalized therapies. Biomarkers, particularly genetic and epigenetic depression biomarkers, offer promise in uncovering the biological mechanisms underlying depression, potentially revolutionizing its management. Aim: Primary aim: To identify biomarkers associated with depressive disorders, with a focus on genetic and epigenetic biomarkers. Secondary aim: To optimize the current classification of biomarkers associated with different types of depressive disorders, with a focus on genetic and epigenetic biomarkers. Methods: We integrated findings with strategic keywords extracted from relevant studies, conducting a thorough literature review across the Google Scholar, PubMed, and Web of Science databases. Lastly, final reference inclusion had stringent criteria: recent, diverse peer-reviewed articles in English, all study designs, ensuring up-to-date coverage of genetic and epigenetic depression biomarker research. Results: The review reveals the classification of genetic and epigenetic biomarkers in regard to the type of biomarker, the system of the human body it derives from, and the sampling entity. All of the findings show promise in diagnosing depression, with the potential of predicting treatment outcomes and guiding personalized therapeutic approaches. We defined the significant correlations between genetic and epigenetic biomarker profiles and clinical parameters such as symptom severity and treatment response, thereby enhancing diagnostic accuracy and guiding treatment strategies tailored to individual patient needs across diverse depressive subtypes and treatment responses. Conclusion: Identifying biomarkers associated with depressive disorders, with a focus on genetic and epigenetic biomarkers, represents a critical step toward improving diagnostic precision and treatment efficacy. By elucidating the complex biological underpinnings of depression, this study contributes to the development of targeted therapies that address the diverse needs of individuals affected by this debilitating group of disorders. Future research should focus on validating these genetic and epigenetic biomarkers in larger cohorts and clinical trials to facilitate their clinical implementation and enhance patient outcomes.

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Crossref · 10.3390/genes16050487

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  • Peripheral blood mononuclear cells (PBMCs) and other circulating molecules can partially reflect central epigenetic states.

    “Evidence indicates that peripheral blood mononuclear cells (PBMCs) and other circulating molecules can partially reflect central epigenetic states, supporting patient stratification, severity assessment, treatment prediction, and personalized care (Milic et al., 2025; Roy et al., 2017).”

    From Histone modifications and depression: epigenetic mechanisms, therapeutic targets, and translational outlook (2026) · cites this paper as Milic et al., 2025

    The Discussion says peripheral biomarkers can reflect depression pathophysiology, and §4.10 describes potential uses of epigenetic markers for treatment prediction and personalized care. But the cited passages do not establish that PBMCs or other circulating molecules reflect central epigenetic states. Section 4.15 instead cautions that inferring central changes from peripheral biomarkers is a major limitation; page numbers were not available in our copy. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Inflammatory markers such as CRP and IL-6, as well as neurotrophins including BDNF, NGF, and VEGF, are closely associated with depression.

    “Inflammatory markers such as CRP and IL-6, as well as neurotrophins including BDNF, NGF, and VEGF, are closely associated with depression (Milic et al., 2025).”

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Research works printed but not linked: 1

  1. [14]Singhal N. Stigma, Prejudice and Discrimination Against People with Mental Illness: A Physician Review; American Psychiatric Association Portal of Patients and Families. March 2024 Available online: https://www.psychiatry.org/patients-families/stigma-and-discrimination (accessed on 15 July 2024)

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Authors
Milic, J., Jovic, S., & Sapic, R.
Affiliations
  • Institute of Public Health of Serbia “Dr Milan Jovanovic Batut”, Dr. Subotica Starijeg 6, 11000 Belgrade, Serbia
  • Faculty of Security Studies, University of Belgrade, Gospodara Vucica 40, 11000 Belgrade, Serbia
  • Faculty of Health Studies, University of Bijeljina, 76300 Bijeljina, Republika Srpska, Bosnia and Herzegovina
Venue
Genes
Publisher
MDPI AG
Published
2025-04-25
Volume
16
Issue
5
Pages
487
ISSN
2073-4425 (ISSN-L)
OpenAlex
W4409806570
Cited by
19
References
94
Citations by year
2026: 14 · 2025: 5
FWCI
2.56
Type
journal article
Language
en
Open access
Locations
  • Genes (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
depression, genetic biomarkers, epigenetic biomarkers, biomarker classification, personalized treatment, treatment response prediction, symptom severity, neuroendocrine pathways, neurobiological pathways, metabolic pathways, inflammatory signaling, diagnostic accuracy
MeSH terms
Depression, Depressive Disorder, Humans, Inflammation, Neurosecretory Systems, Biomarkers, Epigenesis, Genetic, Epigenomics

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