期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4431
关键词
-
资金
- National Basic Research Program of China [2010CB945300, 2011CB943900]
- National Natural Science Foundation of China [30971678]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA01010110]
The earliest HSCs are derived from haemogenic endothelium via endothelial-to-haematopoietic transition during vertebrate embryogenesis; however, the underlying mechanism is largely unclear. Here we show that interplay of Smad1/5 and ERK signalling is essential for haemogenic endothelium-based HSC emergence. Smad1/5 directly inhibits erk expression through recruiting HDAC1 to and inducing de-acetylation of the erk promoter in endothelial cells. Over-activated ERK signalling conferred by inhibition of Smad1/5 promotes the arterial endothelial cell fate and constitutively strengthens the tight junction between endothelial cells, thereby repressing the specification of haemogenic endothelium and the following endothelial-to-haematopoietic transition process. These findings provide new insights into the in vitro generation of transplantable HSCs for potential clinical applications.
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