Cited by 287Epigenetics and DNA MethylationGenetic Syndromes and ImprintingGenomics and Chromatin Dynamics

Methylomic trajectories across human fetal brain development

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Spiers, Helen, Hannon, Eilis, Schalkwyk, Leonard C., Smith, Rebecca, Wong, Chloe C.Y., O’Donovan, Michael C., Bray, Nicholas J., Mill, Jonathan·2015·Genome Research

Abstract

Epigenetic processes play a key role in orchestrating transcriptional regulation during development. The importance of DNA methylation in fetal brain development is highlighted by the dynamic expression of de novo DNA methyltransferases during the perinatal period and neurodevelopmental deficits associated with mutations in the methyl-CpG binding protein 2 (MECP2) gene. However, our knowledge about the temporal changes to the epigenome during fetal brain development has, to date, been limited. We quantified genome-wide patterns of DNA methylation at ∼400,000 sites in 179 human fetal brain samples (100 male, 79 female) spanning 23 to 184 d post-conception. We identified highly significant changes in DNA methylation across fetal brain development at >7% of sites, with an enrichment of loci becoming hypomethylated with fetal age. Sites associated with developmental changes in DNA methylation during fetal brain development were significantly underrepresented in promoter regulatory regions but significantly overrepresented in regions flanking CpG islands (shores and shelves) and gene bodies. Highly significant differences in DNA methylation were observed between males and females at a number of autosomal sites, with a small number of regions showing sex-specific DNA methylation trajectories across brain development. Weighted gene comethylation network analysis (WGCNA) revealed discrete modules of comethylated loci associated with fetal age that are significantly enriched for genes involved in neurodevelopmental processes. This is, to our knowledge, the most extensive study of DNA methylation across human fetal brain development to date, confirming the prenatal period as a time of considerable epigenomic plasticity.

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  • The comparison of our results with sex-specific DNA methylation differences in fetal brain development also showed very little overlap.

    “The comparison of our results with sex-specific DNA methylation differences in fetal brain development [88, 89] also showed very little overlap (Additional file 2: Table S19)”

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Authors
Spiers, H., Hannon, E., Schalkwyk, L. C., Smith, R., Wong, C. C. Y., O’Donovan, M. C., Bray, N. J., & Mill, J.
Affiliations
  • King's College London (GB)
  • University of Exeter (GB)
  • University of Essex (GB)
  • Cardiff University (GB)
Corresponding author
Mill, Jonathan
Venue
Genome Research
Published
2015-02-03
Volume
25
Issue
3
Pages
338-352
ISSN
  • 1088-9051 (ISSN-L)
  • 1549-5469
OpenAlex
W2106976893
Cited by
287
References
20
Citations by year
2026: 9 · 2025: 18 · 2024: 21 · 2023: 17 · 2022: 24 · 2021: 41 · 2020: 32 · 2019: 29 · 2018: 24 · 2017: 28 · 2016: 27 · 2015: 16 · 2012: 1
Type
posted content
Language
en
Open access
Licence
cc-by
Locations
  • Genome Research (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
  • Open Access at Essex (University of Essex) (acceptedVersion)
  • Research Portal (King's College London) (submittedVersion, cc-by)
  • Figshare (submittedVersion)
  • Open Research Exeter (University of Exeter) (submittedVersion, cc-by)
Funders
  • Joint MRC (G0700089)
  • Wellcome Trust (GR082557)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
DNA methylation, fetal brain development, human fetal brain, epigenome, CpG islands, gene body methylation, promoter methylation, brain development, MeCP2
MeSH terms
Autistic Disorder, Base Composition, Brain, Female, Humans, Male, Pregnancy, Regulatory Sequences, Nucleic Acid, Schizophrenia, Sex Factors, Cluster Analysis, CpG Islands, DNA Methylation, Gene Expression Profiling, Organogenesis, Epigenesis, Genetic, Fetal Development, Genome-Wide Association Study, Epigenomics

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