Abstract:
:In the mouse embryo, the aorta-gonad-mesonephros (AGM) region is considered to be the sole location for intraembryonic emergence of hematopoietic stem cells (HSCs). Here we report that, in parallel to the AGM region, the E10.5-E11.5 mouse head harbors bona fide HSCs, as defined by long-term, high-level, multilineage reconstitution and self-renewal capacity in adult recipients, before HSCs enter the circulation. The presence of hemogenesis in the midgestation head is indicated by the appearance of intravascular cluster cells and the blood-forming capacity of a sorted endothelial cell population. In addition, lineage tracing via an inducible VE-cadherin-Cre transgene demonstrates the hemogenic capacity of head endothelium. Most importantly, a spatially restricted lineage labeling system reveals the physiological contribution of cerebrovascular endothelium to postnatal HSCs and multilineage hematopoiesis. We conclude that the mouse embryonic head is a previously unappreciated site for HSC emergence within the developing embryo.
journal_name
Cell Stem Celljournal_title
Cell stem cellauthors
Li Z,Lan Y,He W,Chen D,Wang J,Zhou F,Wang Y,Sun H,Chen X,Xu C,Li S,Pang Y,Zhang G,Yang L,Zhu L,Fan M,Shang A,Ju Z,Luo L,Ding Y,Guo W,Yuan W,Yang X,Liu Bdoi
10.1016/j.stem.2012.07.004subject
Has Abstractpub_date
2012-11-02 00:00:00pages
663-75issue
5eissn
1934-5909issn
1875-9777pii
S1934-5909(12)00419-5journal_volume
11pub_type
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