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TRPV3 es una proteína similar al receptor vanilloide sensible a la temperatura
G D Smith1, M J Gunthorpe, R E Kelsell
1Neurology-CEDD, GlaxoSmithKline, Third Avenue, Harlow CM19 5AW, UK.
Nature
|June 22, 2002
Resumen
Los investigadores descubrieron la proteína 3 similar al receptor vaniloide (VRL3/TRPV3), un canal iónico sensible al calor distinto del VR1/TRPV1.1. VRL3 puede formar canales con VR1, lo que contribuye a la sensación de calor.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología Molecular Biología Molecular
- Fisiología Sensorial Fisiología Sensorial.
Sus antecedentes:
- El receptor vanilloide-1 (VR1/TRPV1) es un canal catiónico termo-sensible activado por el calor, el ácido y la capsaicina.
- La alteración del gen VR1 afecta la respuesta a la capsaicina, pero tiene un impacto mínimo en la nocicepción térmica, lo que sugiere la existencia de otros sensores de calor.
Objetivo del estudio:
- Para identificar nuevos receptores termo-sensibles distintos del VR1.
- Para caracterizar la función y las propiedades de un recién identificado miembro de la familia de receptores vanilloides.
Principales métodos:
- Identificación genética y caracterización del VRL3 (TRPV3).
- Análisis de la expresión de VRL3 en las neuronas ganglionares de la raíz dorsal.
- Estudios funcionales de VRL3, incluida la expresión heteróloga y la asociación con VR1.
Principales resultados:
- Identified Vanilloid Receptor-Like Protein 3 (VRL3/TRPV3), es un canal iónico sensible al calor pero insensible a la capsaicina.
- VRL3 tiene un umbral de activación térmica de aproximadamente 39 ° C y se coexpresa con VR1 en las neuronas sensoriales.
- VRL3 puede asociarse con VR1, modulando potencialmente su función.
Conclusiones:
- VRL3 es un nuevo canal iónico termo-sensible involucrado en la sensación de calor.
- VRL3 puede funcionar como una subunidad adicional en los canales de receptores vanilloides heteroméricos, junto con VR1.1.
- El descubrimiento de VRL3 amplía la comprensión de los mecanismos de termo-sensación más allá de VR1.
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