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Electrofisiología óptica genéticamente dirigida en circuitos neuronales intactos
Guan Cao1, Jelena Platisa, Vincent A Pieribone
1Department of Cellular and Molecular Physiology, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06520, USA.
Cell
|August 13, 2013
Resumen
ArcLight, un nuevo indicador de tensión fluorescente genéticamente codificado (GEVI), registra con éxito la actividad eléctrica en cerebros intactos de moscas de la fruta. Este avance permite el monitoreo óptico simultáneo del potencial de la membrana neuronal en circuitos neuronales complejos.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Imágenes ópticas de imágenes ópticas.
- Genética La genética.
Sus antecedentes:
- Los sistemas nerviosos dependen de la actividad eléctrica neuronal integrada para el procesamiento de la información.
- El monitoreo óptico del potencial de la membrana neuronal utilizando indicadores de voltaje fluorescente genéticamente codificados (GEVIs) es crucial para el estudio de los circuitos neuronales.
- Los GEVIs existentes carecen de una detección de señal robusta en el tejido cerebral intacto para grabaciones simultáneas de múltiples neuronas.
Objetivo del estudio:
- Evaluar la eficacia del ArcLight GEVI para el monitoreo de la actividad eléctrica neuronal en circuitos neuronales intactos.
- Demostrar la capacidad de ArcLight para detectar eventos por debajo del umbral y potenciales de acción en neuronas genéticamente dirigidas.
- Para permitir la medición óptica del potencial de la membrana en cerebros de Drosophila intactos.
Principales métodos:
- Utilizó el ArcLight GEVI en neuronas genéticamente dirigidas dentro del cerebro intacto de la mosca de la fruta Drosophila.
- Realizó un monitoreo óptico simultáneo del potencial de la membrana neuronal.
- Registró eventos eléctricos por debajo del umbral y potenciales de acción.
Principales resultados:
- ArcLight demostró una detección de señal robusta en el cerebro intacto de Drosophila.
- Eventos y potenciales de acción por debajo del umbral registrados con éxito en neuronas genéticamente dirigidas.
- Reveló señales eléctricas dentro de las ramas de las neuritas, ofreciendo una visión detallada del circuito.
Conclusiones:
- ArcLight proporciona una poderosa herramienta para la medición óptica del potencial de membrana en circuitos neuronales intactos.
- Este GEVI permite un registro fiable y simultáneo de eventos eléctricos en múltiples neuronas.
- ArcLight tiene el potencial de revolucionar el estudio del procesamiento de la información neuronal, similar a los sensores Ca2+.
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