Hedgehog and Bmp polarize hematopoietic stem cell emergence in the zebrafish dorsal aorta.
Dev Cell
; 16(6): 909-16, 2009 Jun.
Article
em En
| MEDLINE
| ID: mdl-19531361
ABSTRACT
Hematopoietic stem cells (HSCs) are first detected in the floor of the embryonic dorsal aorta (DA), and we investigate the signals that induce the HSC program there. We show that while continued Hedgehog (Hh) signaling from the overlying midline structures maintains the arterial program characteristic of the DA roof, a ventral Bmp4 signal induces the blood stem cell program in the DA floor. This patterning of the DA by Hh and Bmp is the mirror image of that in the neural tube, with Hh favoring dorsal rather than ventral cell types, and Bmp favoring ventral rather than dorsal. With the majority of current data supporting a model whereby HSCs derive from arterial endothelium, our data identify the signal driving this conversion. These findings are important for the study of the production of HSCs from embryonic stem cells and establish a paradigm for the development of adult stem cells.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Aorta
/
Peixe-Zebra
/
Células-Tronco Hematopoéticas
/
Polaridade Celular
/
Padronização Corporal
/
Proteínas de Peixe-Zebra
/
Proteínas Hedgehog
/
Proteína Morfogenética Óssea 4
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Dev Cell
Assunto da revista:
EMBRIOLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Reino Unido