Cited by 773Epigenetics and DNA MethylationSchizophrenia research and treatmentGenetic Associations and Epidemiology

Epigenomic Profiling Reveals DNA-Methylation Changes Associated with Major Psychosis

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Mill, Jonathan, Tang, Thomas, Kaminsky, Zachary, Khare, Tarang, Yazdanpanah, Simin, Bouchard, Luigi, Jia, Peixin, Assadzadeh, Abbas +4 more·2008·The American Journal of Human Genetics

Abstract

Epigenetic misregulation is consistent with various non-Mendelian features of schizophrenia and bipolar disorder. To date, however, few studies have investigated the role of DNA methylation in major psychosis, and none have taken a genome-wide epigenomic approach. In this study we used CpG-island microarrays to identify DNA-methylation changes in the frontal cortex and germline associated with schizophrenia and bipolar disorder. In the frontal cortex we find evidence for psychosis-associated DNA-methylation differences in numerous loci, including several involved in glutamatergic and GABAergic neurotransmission, brain development, and other processes functionally linked to disease etiology. DNA-methylation changes in a significant proportion of these loci correspond to reported changes of steady-state mRNA level associated with psychosis. Gene-ontology analysis highlighted epigenetic disruption to loci involved in mitochondrial function, brain development, and stress response. Methylome network analysis uncovered decreased epigenetic modularity in both the brain and the germline of affected individuals, suggesting that systemic epigenetic dysfunction may be associated with major psychosis. We also report evidence for a strong correlation between DNA methylation in the MEK1 gene promoter region and lifetime antipsychotic use in schizophrenia patients. Finally, we observe that frontal-cortex DNA methylation in the BDNF gene is correlated with genotype at a nearby nonsynonymous SNP that has been previously associated with major psychosis. Our data are consistent with the epigenetic theory of major psychosis and suggest that DNA-methylation changes are important to the etiology of schizophrenia and bipolar disorder.

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Crossref · 10.1016/j.ajhg.2008.01.008

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  • The breadth of coverage of epigenome-wide association studies offers more informative insight on biological pathways than the candidate gene approach.

    “While both designs have their advantages and limitations, the breadth of coverage of EWAS offers a more informative insight on biological pathways. This is based on the rational that chromatin conformation and transcriptional regulation are influenced by a set of methylated or unmethylated cytosines across a region, rather than specific CpG sites in isolation (Mill et al., 2008)”
  • Mill and colleagues performed the first EWAS in post-mortem brains of SCZ and BD subjects compared to controls, and found DNAm changes associated with SCZ and BD at loci involved in glutamatergic and GABAergic neurotransmission.

    “In terms of EWAS Mill and colleagues (Mill et al., 2008) performed the first EWAS in post-mortem brains of SCZ and BD subjects compared to controls, and found DNAm changes associated with SCZ and BD at loci involved in glutamatergic (GRIA 2, GRIND3B) and GABAergic (MARLIN-1, KCNJ6, HELT) neurotransmission, supporting previous candidate genes results.”
  • It is known that schizophrenia patients have upregulated genes for inflammatory cytokines, and downregulated Bdnf gene transcription.

    “It is known that schizophrenia patients have upregulated genes for inflammatory cytokines [122, 123], and downregulated Bdnf gene transcription [124, 125].”

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Authors
Mill, J., Tang, T., Kaminsky, Z., Khare, T., Yazdanpanah, S., Bouchard, L., Jia, P., Assadzadeh, A., Flanagan, J., Schumacher, A., Wang, S.-C., & Petronis, A.
Affiliations
Centre for Addiction and Mental Health (CA)
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2008-03
Volume
82
Issue
3
Pages
696-711
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2121471393
Cited by
773
References
76
Citations by year
2026: 5 · 2025: 7 · 2024: 13 · 2023: 15 · 2022: 18 · 2021: 26 · 2020: 25 · 2019: 28 · 2018: 35 · 2017: 44 · 2016: 52 · 2015: 52 · 2014: 80 · 2013: 76 · 2012: 75
FWCI
30.20
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
National Institute of Mental Health (R01MH074127, R01MH088413)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
DNA methylation, schizophrenia, bipolar disorder, frontal cortex, CpG islands, glutamatergic neurotransmission, GABAergic neurotransmission, brain development, mitochondrial function, stress response, antipsychotic use, brain-derived neurotrophic factor, non-synonymous SNPs, gene expression
MeSH terms
Adult, Base Sequence, Bipolar Disorder, Brain, Female, Genes, Humans, Male, Middle Aged, Molecular Sequence Data, Schizophrenia, CpG Islands, DNA Methylation, Oligonucleotide Array Sequence Analysis, Epigenesis, Genetic

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