RUNX1 regulates the CD34 gene in haematopoietic stem cells by mediating interactions with a distal regulatory element

Research output: Contribution to journalArticle

Authors

  • E Levantini
  • S Lee
  • HS Radomska
  • CJ Hetherington
  • M Alberich-Jorda
  • G Amabile
  • P Zhang
  • DA Gonzalez
  • J Zhang
  • DS Basseres
  • NK Wilson
  • S Koschmieder
  • G Huang
  • DE Zhang
  • AK Ebralidze
  • Y Okuno
  • B Gottgens
  • DG Tenen

Colleges, School and Institutes

Abstract

The transcription factor RUNX1 is essential to establish the haematopoietic gene expression programme; however, the mechanism of how it activates transcription of haematopoietic stem cell (HSC) genes is still elusive. Here, we obtained novel insights into RUNX1 function by studying regulation of the human CD34 gene, which is expressed in HSCs. Using transgenic mice carrying human CD34 PAC constructs, we identified a novel downstream regulatory element (DRE), which is bound by RUNX1 and is necessary for human CD34 expression in long-term (LT)-HSCs. Conditional deletion of Runx1 in mice harbouring human CD34 promoter-DRE constructs abrogates human CD34 expression. We demonstrate by chromosome conformation capture assays in LT-HSCs that the DRE physically interacts with the human CD34 promoter. Targeted mutagenesis of RUNX binding sites leads to perturbation of this interaction and decreased human CD34 expression in LT-HSCs. Overall, our in vivo data provide novel evidence about the role of RUNX1 in mediating interactions between distal and proximal elements of the HSC gene CD34. The EMBO Journal (2011) 30, 4059-4070. doi:10.1038/emboj.2011.285; Published online 26 August 2011

Details

Original languageEnglish
Pages (from-to)4059-4070
Number of pages12
JournalThe EMBO journal
Volume30
Issue number19
Publication statusPublished - 1 Oct 2011

Keywords

  • CD34, gene regulation, long-range chromatin looping, haematopoietic stem cell, RUNX proteins