Cited by 192Bipolar Disorder and TreatmentEpigenetics and DNA MethylationSchizophrenia research and treatment

Selective DNA Methylation of BDNF Promoter in Bipolar Disorder: Differences Among Patients with BDI and BDII

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D'Addario, Claudio, Dell'Osso, Bernardo, Palazzo, Maria Carlotta, Benatti, Beatrice, Lietti, Licia, Cattaneo, Elisabetta, Galimberti, Daniela, Fenoglio, Chiara +12 more·2012·Neuropsychopharmacology

Abstract

The etiology of bipolar disorder (BD) is still poorly understood, involving genetic and epigenetic mechanisms as well as environmental contributions. This study aimed to investigate the degree of DNA methylation at the promoter region of the brain-derived neurotrophic factor (BDNF) gene, as one of the candidate genes associated with major psychoses, in peripheral blood mononuclear cells isolated from 94 patients with BD (BD I=49, BD II=45) and 52 healthy controls. A significant BDNF gene expression downregulation was observed in BD II 0.53±0.11%; P<0.05), but not in BD I (1.13±0.19%) patients compared with controls (CONT: 1±0.2%). Consistently, an hypermethylation of the BDNF promoter region was specifically found in BD II patients (CONT: 24.0±2.1%; BDI: 20.4±1.7%; BDII: 33.3±3.5%, P<0.05). Of note, higher levels of DNA methylation were observed in BD subjects on pharmacological treatment with mood stabilizers plus antidepressants (34.6±4.2%, predominantly BD II) compared with those exclusively on mood-stabilizing agents (21.7±1.8%; P<0.01, predominantly BD I). Moreover, among the different pharmacological therapies, lithium (20.1±3.8%, P<0.05) and valproate (23.6±2.9%, P<0.05) were associated with a significant reduction of DNA methylation compared with other drugs (35.6±4.6%). Present findings suggest selective changes in DNA methylation of BDNF promoter in subjects with BD type II and highlight the importance of epigenetic factors in mediating the onset and/or susceptibility to BD, providing new insight into the mechanisms of gene expression. Moreover, they shed light on possible mechanisms of action of mood-stabilizing compounds vs antidepressants in the treatment of BD, pointing out that BDNF regulation might be a key target for their effects.

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  1. First MB, Spitzer RL, Gibbon L, Williams JBV (2002). Structured Clinical Interview for DSM-IV-TR Axis I Disorders, Research Version, Non-Patient Edition (SCID-I/NP). New York State Psychiatric Institute, Biometric Research: New York.
  2. First MB, Spitzer RL, Gibbon L, Williams JBV (2002). Structured Clinical Interview for DSM-IV-TR Axis I Disorders, Research Version, Patient Edition (SCID-I/P). New York State Psychiatric Institute, Biometric Research: New York.

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Authors
D'Addario, C., Dell'Osso, B., Palazzo, M. C., Benatti, B., Lietti, L., Cattaneo, E., Galimberti, D., Fenoglio, C., Cortini, F., Scarpini, E., Arosio, B., Di Francesco, A., Di Benedetto, M., Romualdi, P., Candeletti, S., Mari, D., Bergamaschini, L., Bresolin, N., Maccarrone, M., & Altamura, A. C.
Affiliations
  • University of Milan (IT)
  • University of Bologna (IT)
  • University of Teramo (IT)
Venue
Neuropsychopharmacology
Published
2012-02-22
Volume
37
Issue
7
Pages
1647-1655
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W1994958608
Cited by
192
References
78
Citations by year
2026: 6 · 2025: 8 · 2024: 9 · 2023: 6 · 2022: 8 · 2021: 12 · 2020: 20 · 2019: 13 · 2018: 12 · 2017: 20 · 2016: 22 · 2015: 12 · 2014: 23 · 2013: 16 · 2012: 5
FWCI
12.75
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
  • UniTERAMO Research Catalog (University of Teramo) (submittedVersion)
  • Archivio Istituzionale della Ricerca - Università degli Studi dell Aquila (submittedVersion)
Funders
Ministero della Salute
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
bipolar disorder, brain-derived neurotrophic factor, DNA methylation, promoter hypermethylation, epigenetics, bipolar I disorder, bipolar II disorder, mood stabilizers, antidepressants, lithium, valproic acid, gene downregulation, peripheral blood mononuclear cells
MeSH terms
Adult, Aged, Bipolar Disorder, Female, Genotype, Humans, Male, Middle Aged, Promoter Regions, Genetic, Antipsychotic Agents, Down-Regulation, DNA Methylation, Brain-Derived Neurotrophic Factor, Genetic Predisposition to Disease

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