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Updated: Jul 22, 2026
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Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Jagged: es un ligando de mamíferos que activa el Notch1
C E Lindsell1, C J Shawber, J Boulter
1Department of Biological Chemistry School of Medicine, University of California, Los Angeles 90024.
Cell
|March 24, 1995
Resumen
Los investigadores identificaron un clon de ADNc de rata, Jagged, que codifica un ligando para el Notch. de los vertebrados. Esta interacción de Jagged-Notch es crucial para mantener las células de mamíferos en un estado indiferenciado.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología Molecular Biología Molecular
- La señalización celular de las células.
Sus antecedentes:
- La vía de señalización de Notch es un mecanismo de comunicación célula-célula altamente conservado esencial para numerosos procesos de desarrollo.
- Comprender los ligandos específicos que activan los receptores de Notch es fundamental para aclarar su papel en la determinación del destino celular.
Objetivo del estudio:
- Identificar y caracterizar un nuevo ligando para los receptores Notch de los vertebrados.
- Investigar el papel funcional de este ligando en la diferenciación celular de los mamíferos.
Principales métodos:
- Aislamiento y secuenciación de un clon de ADNc de rata llamado Jagged.
- Hibridación in situ para analizar patrones de expresión génica en embriones de rata.
- Ensayos de cultivo celular para evaluar la actividad biológica de la señalización Jagged on Notch1.
Principales resultados:
- El ADNc de Jagged codifica una proteína con homología significativa a los ligandos Notch de los invertebrados.
- Jagged exhibe patrones de expresión distintos y superpuestos con Notch1, Notch2 y Notch3 durante el desarrollo embrionario.
- Jagged activa Notch1 en los mioblastos de la rata, inhibiendo su diferenciación en células musculares.
Conclusiones:
- Jagged es un ligando funcional para los receptores Notch de los vertebrados.
- Las interacciones notch-ligand, ejemplificadas por Jagged, juegan un papel en el mantenimiento de las células de mamíferos en un estado indiferenciado, influyendo así en las decisiones del destino celular durante el desarrollo.
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