Early dynamic fate changes in haemogenic endothelium characterized at the single-cell level.

Early dynamic fate changes in haemogenic endothelium characterized at the single-cell level.
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DOI:
10.1038/ncomms3924
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发表时间:
2013
影响因子:
16.6
通讯作者:
de Bruijn, Marella F. T. R.
de Bruijn, Marella F. T. R.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Swiers, Gemma;Baumann, Claudia;O'Rourke, John;Giannoulatou, Eleni;Taylor, Stephen;Joshi, Anagha;Moignard, Victoria;Pina, Cristina;Bee, Thomas;Kokkaliaris, Konstantinos D.;Yoshimoto, Momoko;Yoder, Mervin C.;Frampton, Jon;Schroeder, Timm;Enver, Tariq;Goettgens, Berthold;de Bruijn, Marella F. T. R.

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Haematopoietic stem cells (HSCs) are the founding cells of the adult haematopoietic system, born during ontogeny from a specialized subset of endothelium, the haemogenic endothelium (HE) via an endothelial-to-haematopoietic transition (EHT). Although recently imaged in real time, the underlying mechanism of EHT is still poorly understood. We have generated a Runx1 + 23 enhancer-reporter transgenic mouse (23GFP) for the prospective isolation of HE throughout embryonic development. Here we perform functional analysis of over 1,800 and transcriptional analysis of 268 single 23GFP+ HE cells to explore the onset of EHT at the single-cell level. We show that initiation of the haematopoietic programme occurs in cells still embedded in the endothelial layer, and is accompanied by a previously unrecognized early loss of endothelial potential before HSCs emerge. Our data therefore provide important insights on the timeline of early haematopoietic commitment.
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