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La orientación de la migración celular por el receptor de Drosophila PDGF/VEGF
P Duchek1, K Somogyi, G Jékely
1European Molecular Biology Laboratory, Developmental Biology Programme, 69117 Heidelberg, Germany.
Cell
|October 12, 2001
Resumen
La migración celular dirigida en la oogénesis de Drosophila implica la señalización PVR, redundante con el EGFR. Rac y su activador Mbc median esta orientación, crucial para el desarrollo.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología celular Biología celular.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La migración celular dirigida es crucial para el desarrollo embrionario.
- Comprender los mecanismos moleculares que guían la migración celular in vivo sigue siendo un desafío.
- La migración de las células fronterizas durante la oogénesis de Drosophila ofrece un sistema de modelo tratable.
Objetivo del estudio:
- Investigar las vías de señalización y los mecanismos moleculares que rigen la migración celular dirigida en la oogénesis de Drosophila.
- Identificar los receptores clave y los efectores posteriores involucrados en la orientación de las células fronterizas.
Principales métodos:
- Utilizó la oogénesis de Drosophila como sistema modelo.
- Investigó el papel del receptor de la tirosina quinasa PVR en la migración de las células fronterizas.
- Se examinó la función del factor 1 PDGF/VEGF (PVF1) como un ligando para PVR.
- Evaluó la interacción entre la PVR y la señalización del receptor del factor de crecimiento epidérmico (EGFR).
- Analizó la participación de Rac y su activador Mbc/DOCK180/CED-5.
Principales resultados:
- PVR, un receptor tirosina quinasa, es esencial para guiar a las células fronterizas hacia el ovocito.
- El ovocito segrega PVF1, un ligando para el PVR.
- La orientación mediada por PVR es en gran medida redundante con la señalización del EGFR.
- Rac y el activador Rac Mbc/DOCK180/CED-5 actúan como mediadores de la señal de guía PVR.
Conclusiones:
- La señalización PVR juega un papel importante en la migración celular dirigida durante la oogénesis de Drosophila.
- La redundancia entre PVR y EGFR pone de relieve las complejas redes de señalización en la orientación celular.
- Rac y Mbc/DOCK180/CED-5 son componentes críticos aguas abajo de la vía de guía mediada por PVR.
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