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El factor de crecimiento de fibroblastos 13 es una proteína estabilizadora de microtúbulos que regula la polarización
Qing-Feng Wu1, Liu Yang, Shuai Li
1Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
Cell
|June 26, 2012
Resumen
El factor de crecimiento de fibroblastos 13 (FGF13) estabiliza los microtúbulos, cruciales para el desarrollo cerebral y la migración neuronal. La pérdida de FGF13 causa defectos relacionados con la discapacidad intelectual, similar al retraso mental vinculado al cromosoma X.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología celular Biología celular.
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- Los factores de crecimiento de los fibroblastos secretores (FGF) regulan el desarrollo neuronal temprano.
- FGF13, un FGF no secretor, está implicado en el retraso mental vinculado al cromosoma X (XLMR).
- La función precisa de FGF13 en el desarrollo neuronal no se entiende bien.
Objetivo del estudio:
- Para aclarar la función intracelular de FGF13 durante el desarrollo neuronal.
- Investigar el papel de FGF13 en la migración neuronal y la formación de procesos.
- Para establecer el vínculo entre la deficiencia de FGF13 y los déficits cognitivos.
Principales métodos:
- Investigó la localización intracelular de FGF13 y la interacción con los microtúbulos.
- Se evaluaron los efectos de la pérdida de FGF13 en la polarización neuronal, la ramificación de los axones y la migración.
- Utilizó la deleción genética de FGF13 en modelos de ratón para estudiar el desarrollo neocortical e hipocampo.
- Aprendizaje y memoria evaluados en ratones con deficiencia de FGF13.
Principales resultados:
- El FGF13 actúa de manera intracelular, estabilizando los microtúbulos y promoviendo el desarrollo de axones/procesos.
- FGF13 se enriquece en conos de crecimiento axonal e interactúa directamente con la tubulina.
- La pérdida de FGF13 conduce a una polarización neuronal deteriorada y una ramificación anormal de los axones.
- La deleción genética de FGF13 causa defectos de migración neuronal significativos en el neocórtex y el hipocampo.
- Los ratones con deficiencia de FGF13 muestran déficits en el aprendizaje y la memoria.
Conclusiones:
- FGF13 es una proteína estabilizadora de microtúbulos intracelular crítica esencial para el desarrollo de la corteza cerebral.
- El papel de FGF13 en la migración neuronal y la formación de procesos es vital para la arquitectura normal del cerebro.
- La deficiencia de FGF13 subyace a las deficiencias cognitivas observadas en XLMR, destacando su relevancia clínica.
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