Cited by 61Neuroendocrine regulation and behaviorEpigenetics and DNA MethylationGenetic Syndromes and Imprinting

Brain region-specific methylation in the promoter of the murine oxytocin receptor gene is involved in its expression regulation

Harony-Nicolas, Hala, Mamrut, Shimrat, Brodsky, Leonid, Shahar-Gold, Hadar, Barki-Harrington, Liza, Wagner, Shlomo·2014·Psychoneuroendocrinology

Abstract

Oxytocin is a nine amino acid neuropeptide that is known to play a critical role in fetal expulsion and breast-feeding, and has been recently implicated in mammalian social behavior. The actions of both central and peripheral oxytocin are mediated through the oxytocin receptor (Oxtr), which is encoded by a single gene. In contrast to the highly conserved expression of oxytocin in specific hypothalamic nuclei, the expression of its receptor in the brain is highly diverse among different mammalian species or even within individuals of the same species. The diversity in the pattern of brain Oxtr expression among mammals is thought to contribute to the broad range of social systems and organizations. Yet, the mechanisms underlying this diversity are poorly understood. DNA methylation is a major epigenetic mechanism that regulates gene transcription, and has been linked to reduced expression levels of the Oxtr in individuals with autism. Here we hypothesize that DNA methylation is involved in the expression regulation of Oxtr in the mouse brain. By combining bisulfite DNA conversion and Next-Generation Sequencing we found that specific CpG sites are differentially methylated between distinct brain regions expressing different levels of Oxtr mRNA. Some of these CpG sites are located within putative binding sites of transcription factors known to regulate Oxtr expression, including estrogen receptor α (ERα) and SP1. Specifically, methylation of the SP1 site was found to positively correlate with Oxtr expression. Furthermore, we revealed that the methylation levels of these sites in the various brain regions predict the relationship between ERα and Oxtr mRNA levels. Collectively, our results suggest that brain region-specific expression of the mouse Oxtr gene is epigenetically regulated by DNA methylation of its promoter.

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Crossref · 10.1016/j.psyneuen.2013.10.004

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  • Transgenic mice carrying a reporter gene driven by 5 kb of prairie vole Oxtr 5' flanking sequence express the reporter in a brain pattern resembling prairie voles, suggesting the sequence may suffice for some aspects of brain-region-specific expression.

    “Transgenic mice carrying a reporter gene driven by 5 kb of the prairie vole Oxtr 5’ flanking sequence express the reporter in the brain in a pattern resembling prairie voles (64), suggesting the sequence may suffice for some aspects of brain region-specific expression.”

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Authors
Harony-Nicolas, H., Mamrut, S., Brodsky, L., Shahar-Gold, H., Barki-Harrington, L., & Wagner, S.
Affiliations
University of Haifa (IL)
Corresponding author
Wagner, Shlomo
Venue
Psychoneuroendocrinology
Publisher
Elsevier BV
Published
2014-01
Volume
39
Pages
121-131
ISSN
0306-4530 (ISSN-L)
OpenAlex
W2135606779
Cited by
61
References
48
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 6 · 2021: 8 · 2020: 5 · 2019: 3 · 2018: 7 · 2017: 7 · 2016: 7 · 2015: 7 · 2014: 3
FWCI
8.49
Type
journal article
Language
en
Open access
closed
Locations
  • Psychoneuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Autism Speaks (3613)
  • Israel Science Foundation (1901/08)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • 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
Keywords
oxytocin receptor, DNA methylation, promoter methylation, brain region-specific gene expression, epigenetic regulation, estrogen receptor alpha, Sp1, CpG sites, transcription factor binding sites, mouse brain, autism spectrum disorder
MeSH terms
Animals, Brain, Female, Gene Expression Regulation, Male, Promoter Regions, Genetic, RNA, Messenger, Receptors, Oxytocin, DNA Methylation, Epigenesis, Genetic, Estrogen Receptor alpha, Mice

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