Human definitive haemogenic endothelium and arterial vascular endothelium represent distinct lineages

Andrea Ditadi, Christopher M. Sturgeon, Joanna Tober, Geneve Awong, Marion Kennedy, Amanda D. Yzaguirre, Lisa Azzola, Elizabeth S. Ng, Edouard G. Stanley, Deborah L. French, Xin Cheng, Paul Gadue, Nancy A. Speck, Andrew G. Elefanty, Gordon Keller

Research output: Contribution to journalArticlepeer-review

172 Scopus citations

Abstract

The generation of haematopoietic stem cells (HSCs) from human pluripotent stem cells (hPSCs) will depend on the accurate recapitulation of embryonic haematopoiesis. In the early embryo, HSCs develop from the haemogenic endothelium (HE) and are specified in a Notch-dependent manner through a process named endothelial-to-haematopoietic transition (EHT). As HE is associated with arteries, it is assumed that it represents a subpopulation of arterial vascular endothelium (VE). Here we demonstrate at a clonal level that hPSC-derived HE and VE represent separate lineages. HE is restricted to the CD34 + CD73 â ' CD184 â ' fraction of day 8 embryoid bodies and it undergoes a NOTCH-dependent EHT to generate RUNX1C + cells with multilineage potential. Arterial and venous VE progenitors, in contrast, segregate to the CD34 + CD73 med CD184 + and CD34 + CD73 hi CD184 â ' fractions, respectively. Together, these findings identify HE as distinct from VE and provide a platform for defining the signalling pathways that regulate their specification to functional HSCs.

Original languageEnglish
Pages (from-to)580-591
Number of pages12
JournalNature Cell Biology
Volume17
Issue number5
DOIs
StatePublished - May 5 2015

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