Details

Autor(en) / Beteiligte

• Solaimani Kartalaei, Parham
• Yamada-Inagawa, Tomoko
• Vink, Chris S
• de Pater, Emma
• van der Linden, Reinier
• Marks-Bluth, Jonathon
• van der Sloot, Anthon
• van den Hout, Mirjam
• Yokomizo, Tomomasa
• van Schaick-Solernó, M Lucila
• Delwel, Ruud
• Pimanda, John E
• van IJcken, Wilfred F J
• Dzierzak, Elaine

Titel

Whole-transcriptome analysis of endothelial to hematopoietic stem cell transition reveals a requirement for Gpr56 in HSC generation

Ist Teil von

• The Journal of experimental medicine, 2015-01, Vol.212 (1), p.93-106

Ort / Verlag

United States: The Rockefeller University Press

Erscheinungsjahr

2015

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Hematopoietic stem cells (HSCs) are generated via a natural transdifferentiation process known as endothelial to hematopoietic cell transition (EHT). Because of small numbers of embryonal arterial cells undergoing EHT and the paucity of markers to enrich for hemogenic endothelial cells (ECs [HECs]), the genetic program driving HSC emergence is largely unknown. Here, we use a highly sensitive RNAseq method to examine the whole transcriptome of small numbers of enriched aortic HSCs, HECs, and ECs. Gpr56, a G-coupled protein receptor, is one of the most highly up-regulated of the 530 differentially expressed genes. Also, highly up-regulated are hematopoietic transcription factors, including the "heptad" complex of factors. We show that Gpr56 (mouse and human) is a target of the heptad complex and is required for hematopoietic cluster formation during EHT. Our results identify the processes and regulators involved in EHT and reveal the surprising requirement for Gpr56 in generating the first HSCs.