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Cell Aggregation Assays to Evaluate the Binding of the Drosophila Notch with Trans-Ligands and its Inhibition by Cis-Ligands
Published on: January 2, 2018
DSCAM es un receptor de netrina que colabora con DCC en la mediación de respuestas de giro a la netrina-1
Alice Ly1, Anatoly Nikolaev, Geetha Suresh
1Department of Molecular, Cellular, and Developmental Biology, Yale University, 266 Whitney Avenue, New Haven, CT 06520, USA.
Cell
|July 1, 2008
Resumen
Abajo, abajo, abajo.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
- Biología Molecular Biología Molecular
Sus antecedentes:
- Los axones comisurales espinales navegan por la línea media ventral durante el desarrollo del sistema nervioso.
- Netrin-1 y su receptor DCC son señales de guía conocidas, pero se sospecha que hay componentes adicionales.
- La molécula de adhesión celular del síndrome de Down (DSCAM) es un gen candidato para este proceso.
Objetivo del estudio:
- Investigar el papel de DSCAM en la orientación del axón comissural espinal.
- Para determinar si el DSCAM funciona como un receptor de netrina-1.
- Para dilucidar la vía de señalización que involucra netrin-1 y DSCAM.
Principales métodos:
- Análisis de la expresión de DSCAM en los axones comisurales espinales.
- Pruebas de unión a la netrina-1 para el DSCAM.
- Estudios funcionales utilizando manipulaciones genéticas in vivo e in vitro.
- Culturas explantadas de neuronas espinales de Xenopus para probar la atracción de la netrina-1 mediada por DSCAM.
Principales resultados:
- DSCAM se expresa en los axones comisurales espinales y se une a la netrina-1.
- DSCAM es esencial para que los axones crezcan hacia y a través de la línea media ventral.
- Tanto el DSCAM como el DCC pueden mediar de forma independiente las respuestas de giro neuronal a la netrina-1.
- La expresión exógena de DSCAM en las neuronas de Xenopus confiere la atracción de la netrina-1 independientemente del DCC.
Conclusiones:
- DSCAM actúa como un receptor funcional para la netrina-1.
- La señalización Netrin-1/DSCAM juega un papel crítico en la orientación de los axones comisurales de los vertebrados.
- DSCAM es un mediador clave de la búsqueda de la trayectoria del axón de la línea media durante el desarrollo del sistema nervioso.
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