Jagged1-dependent Notch signaling is dispensable for hematopoietic stem cell self-renewal and differentiation.
Blood
; 105(6): 2340-2, 2005 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-15550486
ABSTRACT
Jagged1-mediated Notch signaling has been suggested to be critically involved in hematopoietic stem cell (HSC) self-renewal. Unexpectedly, we report here that inducible Cre-loxP-mediated inactivation of the Jagged1 gene in bone marrow progenitors and/or bone marrow (BM) stromal cells does not impair HSC self-renewal or differentiation in all blood lineages. Mice with simultaneous inactivation of Jagged1 and Notch1 in the BM compartment survived normally following a 5FU-based in vivo challenge. In addition, Notch1-deficient HSCs were able to reconstitute mice with inactivated Jagged1 in the BM stroma even under competitive conditions. In contrast to earlier reports, these data exclude an essential role for Jagged1-mediated Notch signaling during hematopoiesis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Ligação ao Cálcio
/
Células-Tronco Hematopoéticas
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Transdução de Sinais
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Diferenciação Celular
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Proliferação de Células
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Receptores Notch
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Proteínas de Membrana
Limite:
Animals
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article