Abstract
Stem cell factor (SCF), the ligand for the c-kit receptor, is essential for the production of red blood cells during development and stress erythropoiesis. SCF promotes erythroblast proliferation and survival, while delaying erythroid differentiation through mechanisms that are largely unknown. In cultures of primary human differentiating erythroblasts, we found that SCF induces an increase in the expression of Notch2, a member of the Notch family implicated in the control of cell growth and differentiation. Functional inhibition of either Notch or its ligand Jagged1 inhibited the effects of SCF on erythroid cell expansion. SCF also induced the expression of Hes-1 and GATA-2, which may contribute to transduce Notch2 signals in response to SCF. Transduction of primary erythroid precursors with a dominant-negative Notch2 mutant inhibited both basal and SCF-mediated erythroblast expansion, and counteracted the effects of SCF on erythroblast differentiation. These findings provide a clue to understand the effects of increased proliferation and delayed differentiation elicited by SCF on the erythroid compartment and indicate Notch2 as a new player in the regulation of red cell differentiation. © 2011 Macmillan Publishers Limited All rights reserved.
Lingua originale | English |
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pagine (da-a) | 371-380 |
Numero di pagine | 10 |
Rivista | Cell Death and Differentiation |
Volume | 18 |
DOI | |
Stato di pubblicazione | Pubblicato - 2011 |
Keywords
- Antigens, CD34
- Basic Helix-Loop-Helix Transcription Factors
- Calcium-Binding Proteins
- Cell Biology
- Cell Differentiation
- Cell Proliferation
- Cells, Cultured
- Erythroblasts
- GATA2 Transcription Factor
- Homeodomain Proteins
- Humans
- Intercellular Signaling Peptides and Proteins
- Jagged-1 Protein
- Membrane Proteins
- Molecular Biology
- Notch
- Receptor, Notch2
- Serrate-Jagged Proteins
- Signal Transduction
- Stem Cell Factor
- Transcription Factor HES-1
- erythropoiesis
- stem cell factor