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El GABA y sus agonistas mejoraron la función cortical visual en monos senescentes.

Audie G Leventhal1, Yongchang Wang, Mingliang Pu

  • 1Department of Neurobiology and Anatomy, University of Utah School of Medicine, Salt Lake City, UT 84132, USA. audie.leventhal@m.cc.utah.edu

Science (New York, N.Y.)
|May 6, 2003
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Resumen

El envejecimiento perjudica la función cerebral debido a la reducción de la inhibición. La restauración de la señalización del ácido gamma-aminobutírico (GABA) mejoró el procesamiento visual en monos mayores, lo que sugiere posibles tratamientos para las disminuciones relacionadas con la edad.

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Investigación sobre el envejecimiento Investigación sobre el envejecimiento.
  • Procesamiento Sensorial Procesamiento Sensorial

Sus antecedentes:

  • La función cortical cerebral humana disminuye con la edad.
  • Esta disminución está relacionada con la reducción de la inhibición intracortical durante la senescencia.
  • Comprender estos cambios es crucial para abordar las deficiencias funcionales relacionadas con la edad.

Objetivo del estudio:

  • Investigar el papel de la inhibición mediada por el ácido gamma-aminobutírico (GABA) en la disminución relacionada con la edad de la función cortical V1.
  • Para evaluar los efectos de GABA, muscimol (agonista de GABAa) y bicuculina (antagonista de GABAa) en las propiedades neuronales en monos viejos.
  • Explorar el potencial terapéutico de mejorar la función GABAérgica para los déficits sensoriales relacionados con la edad.

Principales métodos:

  • Utilizó microelectrodos multibarril para la administración precisa de fármacos en la corteza V1 de monos viejos.
  • El GABA, el muscimol y la bicuculina se aplican electroforéticamente a las células V1 individuales.
  • Comparó las respuestas neuronales en monos viejos con los datos establecidos de animales jóvenes.

Principales resultados:

  • La bicuculina mostró efectos significativamente más débiles en las respuestas neuronales en animales viejos en comparación con los animales jóvenes, lo que confirma la inhibición degradada mediada por GABA.
  • La administración de GABA y muscimol mejoró la función visual en monos viejos.
  • Muchas células V1 tratadas en animales viejos exhibieron propiedades de respuesta neuronal similares a las de animales jóvenes.

Conclusiones:

  • La inhibición GABAérgica se ve comprometida en el envejecimiento de la corteza visual de los primates.
  • La mejora de la actividad del receptor GABAa puede restaurar la función neuronal y el procesamiento visual deteriorados por la edad.
  • Dirigirse a las vías GABAérgicas ofrece una estrategia terapéutica prometedora para el deterioro sensorial, motor y cognitivo relacionado con la edad.