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La actividad intrínseca de los receptores olfativos guía la formación de mapas sensoriales
1Department of Molecular and Cell Biology, Helen Wills Neuroscience Institute and QB3 Functional Genomics Laboratory, University of California, Berkeley, Berkeley, CA 94720, USA.
Cell
|September 17, 2013
Resumen
Las neuronas sensoriales olfativas forman conexiones específicas en el cerebro. Un nuevo estudio muestra que la actividad inherente de los receptores olfativos, incluso sin olor, guía estas conexiones neuronales.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Desarrollo del sistema olfativo de desarrollo de sistemas.
- Axon guía de guía de eje.
Sus antecedentes:
- Las neuronas sensoriales olfativas (OSN) proyectan sus axones hacia el bulbo olfativo.
- Estas proyecciones forman patrones estereotipados basados en la expresión del receptor odorante (OR).
- Los mecanismos que guían la orientación de los axones de OSN son complejos y no se comprenden completamente.
Objetivo del estudio:
- Investigar el papel de la actividad intrínseca de los receptores olfativos en la orientación de los axones olfativos.
- Para determinar si las ORs influyen en la orientación de OSN independientemente de la estimulación del olor.
Principales métodos:
- El estudio realizado por Nakashima et al. examinó la relación entre la actividad intrínseca de OR y los patrones de orientación de axones.
- El análisis se centró en la influencia de las OR en ausencia de odorantes externos.
Principales resultados:
- El nivel de actividad intrínseca de los receptores olfativos tiene un impacto directo en la orientación de los axones olfativos.
- Esta actividad intrínseca influye en los patrones estereotipados de inervación dentro del bulbo olfativo.
Conclusiones:
- La actividad intrínseca del receptor del olor es un factor crítico en el establecimiento de circuitos neuronales precisos en el sistema olfativo.
- Este hallazgo proporciona nuevos conocimientos sobre los mecanismos moleculares que gobiernan la orientación de los axones en el cerebro en desarrollo.
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