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La oncoproteína SCL/tal-1 de la leucemia de células T es esencial para el desarrollo de todos los linajes
C Porcher1, W Swat, K Rockwell
1Division of Hematology and Oncology, Childrens Hospital, Boston, Massachusetts, USA.
Cell
|July 12, 1996
Resumen
El factor de transcripción SCL/tal-1 es esencial para toda la producción de células sanguíneas. Sin SCL/tal-1, el desarrollo de glóbulos rojos, células mieloides y células linfoides está completamente bloqueado.
Área de la Ciencia:
- Hematología Hematología.
- Biología Molecular Biología Molecular
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- La oncoproteína SCL/tal-1 es un factor de transcripción crucial para la producción embrionaria de glóbulos rojos.
- Comprender el papel más amplio de SCL / tal-1 en la hematopoiesis es esencial para comprender el desarrollo de la sangre.
Objetivo del estudio:
- Investigar el potencial hematopoyético de células deficientes de SCL/tal-1 en varios linajes.
- Determinar las primeras funciones de SCL/tal-1 durante el desarrollo de las células sanguíneas.
Principales métodos:
- Células madre embrionarias homocigotas mutantes SCL/tal-1-/- utilizadas.
- Se realizan ensayos de diferenciación in vitro.
- Se analizaron ratones quiméricos generados a partir de células madre mutantes.
Principales resultados:
- La hematopoyesis fue indetectable en ausencia de SCL/tal-1.
- La generación de glóbulos rojos, células mieloides, megacariocitos, mastocitos y células linfoides T y B fue abrogada.
- SCL/tal-1 es indispensable para el desarrollo de todos los principales tipos de células sanguíneas.
Conclusiones:
- SCL/tal-1 juega un papel crítico y temprano en el desarrollo hematopoyético.
- Su función puede estar en la especificación del mesodermo ventral a un destino de la célula sanguínea o en la formación/mantenimiento del progenitor.
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