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Control de la especificación de la sinapsis neuronal mediante un programa de empalme alternativo altamente dedicado

Lisa Traunmüller1, Andrea M Gomez1, Thi-Minh Nguyen1

  • 1Biozentrum, University of Basel Klingelbergstrasse 50-70, 4056 Basel, Switzerland.

Science (New York, N.Y.)
|May 14, 2016
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Resumen

La proteína de unión al ARN SLM2 controla el empalme de genes específicos en el hipocampo del ratón, afectando la función sináptica. La corrección de un solo gen objetivo en ratones knockout SLM2 restauró la plasticidad y el comportamiento sinápticos normales.

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Área de la Ciencia:

  • La neurociencia
  • Biología molecular
  • La genética

Sus antecedentes:

  • El empalme de ARN alternativo permite a los genomas aumentar la capacidad de codificación.
  • Las proteínas de unión al ARN regulan el empalme alternativo, influyendo en la función y cantidad de proteínas.
  • Las sinapsis glutamatérgicas son cruciales para el aprendizaje y la memoria en el sistema nervioso central.

Objetivo del estudio:

  • Investigar el papel de la proteína de unión al ARN SLM2 en la función sináptica.
  • Identificar objetivos alternativos de empalme regulados por SLM2 en el hipocampo del ratón.
  • Determinar si el empalme dependiente de SLM2 es esencial para la plasticidad y el comportamiento sinápticos.

Principales métodos:

  • Mapeo de todo el genoma de los eventos de empalme alternativos dependientes de SLM2.
  • Manipulación genética de SLM2 en modelos de ratón.
  • Evaluación de la plasticidad sináptica y ensayos de comportamiento en ratones con knockout Slm2.
  • Corrección genética dirigida de un exón específico dependiente de SLM2 en la neurexina-1.

Principales resultados:

  • SLM2 regula un programa de empalme altamente selectivo de ARN mensajeros que codifican proteínas sinápticas.
  • SLM2 es esencial para la especificación funcional de las sinapsis glutamatérgicas en el hipocampo.
  • La corrección genética de un solo exón objetivo de SLM2 en la neurexina-1 rescató la plasticidad sináptica y los déficits conductuales en ratones con knockout de Slm2.

Conclusiones:

  • SLM2 controla un programa de empalme alternativo específico crítico para las propiedades sinápticas.
  • Este programa de empalme selectivo es vital para la función del sistema nervioso central.
  • Dirigirse al empalme dependiente de SLM2 ofrece una vía potencial para comprender y tratar trastornos neurológicos.