REST is a hypoxia-responsive transcriptional repressor

Sci Rep. 2016 Aug 17:6:31355. doi: 10.1038/srep31355.

Abstract

Cellular exposure to hypoxia results in altered gene expression in a range of physiologic and pathophysiologic states. Discrete cohorts of genes can be either up- or down-regulated in response to hypoxia. While the Hypoxia-Inducible Factor (HIF) is the primary driver of hypoxia-induced adaptive gene expression, less is known about the signalling mechanisms regulating hypoxia-dependent gene repression. Using RNA-seq, we demonstrate that equivalent numbers of genes are induced and repressed in human embryonic kidney (HEK293) cells. We demonstrate that nuclear localization of the Repressor Element 1-Silencing Transcription factor (REST) is induced in hypoxia and that REST is responsible for regulating approximately 20% of the hypoxia-repressed genes. Using chromatin immunoprecipitation assays we demonstrate that REST-dependent gene repression is at least in part mediated by direct binding to the promoters of target genes. Based on these data, we propose that REST is a key mediator of gene repression in hypoxia.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Hypoxia
  • Cell Line
  • Cell Nucleus / genetics
  • Cell Nucleus / metabolism
  • Gene Expression Profiling
  • Gene Expression Regulation
  • Gene Regulatory Networks
  • HEK293 Cells
  • Humans
  • Promoter Regions, Genetic
  • Repressor Proteins / genetics*
  • Repressor Proteins / metabolism*
  • Sequence Analysis, RNA / methods*
  • Signal Transduction
  • Transcription, Genetic*

Substances

  • RE1-silencing transcription factor
  • Repressor Proteins