Genome-wide alterations in hippocampal 5-hydroxymethylcytosine links plasticity genes to acute stress

Sisi Li, Ligia A. Papale, Qi Zhang, Andy Madrid, Li Chen, Pankaj Chopra, Sündüz Keleş, Peng Jin, Reid S. Alisch

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Environmental stress is among the most important contributors to increased susceptibility to develop psychiatric disorders, including anxiety and post-traumatic stress disorder. While even acute stress alters gene expression, the molecular mechanisms underlying these changes remain largely unknown. 5-hydroxymethylcytosine (5hmC) is a novel environmentally sensitive DNA modification that is highly enriched in post-mitotic neurons and is associated with active transcription of neuronal genes. Recently, we found a hippocampal increase of 5hmC in the glucocorticoid receptor gene (Nr3c1) following acute stress, warranting a deeper investigation of stress-related 5hmC levels. Here we used an established chemical labeling and affinity purification method coupled with high-throughput sequencing technology to generate the first genome-wide profile of hippocampal 5hmC following exposure to acute restraint stress and a one-hour recovery. This approach found a genome-wide disruption in 5hmC associated with acute stress response, primarily in genic regions, and identified known and potentially novel stress-related targets that have a significant enrichment for neuronal ontological functions. Integration of these data with hippocampal gene expression data from these same mice found stress-related hydroxymethylation correlated to altered transcript levels and sequence motif predictions indicated that 5hmC may function by mediating transcription factor binding to these transcripts. Together, these data reveal an environmental impact on this newly discovered epigenetic mark in the brain and represent a critical step toward understanding stress-related epigenetic mechanisms that alter gene expression and can lead to the development of psychiatric disorders.

Original languageEnglish (US)
Pages (from-to)99-108
Number of pages10
JournalNeurobiology of Disease
Volume86
DOIs
StatePublished - Feb 1 2016

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Keywords

  • 5-Hydroxymethylcytosine
  • Acute stress
  • DNA methylation
  • Epigenetics
  • Gene expression

ASJC Scopus subject areas

  • Neurology

Cite this

Li, S., Papale, L. A., Zhang, Q., Madrid, A., Chen, L., Chopra, P., Keleş, S., Jin, P., & Alisch, R. S. (2016). Genome-wide alterations in hippocampal 5-hydroxymethylcytosine links plasticity genes to acute stress. Neurobiology of Disease, 86, 99-108. https://doi.org/10.1016/j.nbd.2015.11.010