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Identificación de señales sinérgicas que inician el desarrollo del oído interno
R K Ladher1, K U Anakwe, A L Gurney
1Department of Craniofacial Development, King's College, London, SE1 9RT, UK.
Science (New York, N.Y.)
|December 9, 2000
Resumen
Las señales mesodérmicas y neuronales inician el desarrollo del oído interno. El factor de crecimiento de fibroblastos 19 (FGF-19) y Wnt-8c median sinérgicamente estas señales, dirigiendo la formación del oído interno en los vertebrados.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología molecular La biología molecular.
- Desarrollo óptico de desarrollo óptico.
Sus antecedentes:
- El desarrollo del oído interno requiere señales mesodérmicas y neuronales secuenciales.
- Las moléculas específicas que median estas señales inductivas han permanecido en gran parte desconocidas.
Objetivo del estudio:
- Para investigar la iniciación mesodérmica del desarrollo ótico en vertebrados superiores.
- Para identificar los mediadores moleculares de la inducción del oído interno.
Principales métodos:
- Experimentos de manipulación de tejidos en modelos de vertebrados.
- Análisis de ligandos polipeptídicos extracelulares involucrados en la señalización del desarrollo.
Principales resultados:
- Evidencia que apoya la iniciación mesodérmica del desarrollo del oído interno en vertebrados superiores.
- Se demostró que el mesodermo dirige la diferenciación terminal del oído interno en el ectodermo rostral.
- Interacciones sinérgicas identificadas de FGF-19 (señal mesodérmico) y Wnt-8c (señal neuronal) en el inicio del desarrollo del oído interno.
Conclusiones:
- Las señales mesodérmicas inician el desarrollo del oído interno en los vertebrados superiores.
- FGF-19 y Wnt-8c actúan sinérgicamente para mediar las señales mesodérmicas y neuronales, respectivamente, cruciales para la inducción óptica.
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