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Estructura del receptor para el factor de crecimiento similar a la insulina II: el rompecabezas amplificado
1Department of Pharmacology, Stanford University School of Medicine, CA 94305-5332.
Science (New York, N.Y.)
|March 11, 1988
Resumen
El factor de crecimiento similar a la insulina II (IGF-II) es una hormona cuya función in vivo sigue siendo desconocida. Los investigadores están investigando si su receptor recién identificado, que también se une a la manosa-6-fosfato, media respuestas metabólicas.
Área de la Ciencia:
- Endocrinología Endocrinología.
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
Sus antecedentes:
- El factor de crecimiento similar a la insulina II (IGF-II) es una hormona polipeptídica estructuralmente similar a la insulina y al IGF-I.
- Actualmente se desconoce la función fisiológica in vivo del IGF-II.
- Mientras que el IGF-II provoca respuestas biológicas en células aisladas, estas son a menudo mediadas por la insulina y los receptores de IGF-I.
Objetivo del estudio:
- Para investigar la función del receptor IGF-II.
- Para determinar si el receptor de IGF-II media las respuestas metabólicas al IGF-II.
- Para explorar el doble papel del receptor de IGF-II en la señalización de IGF-II y la orientación de la enzima lisosomal.
Principales métodos:
- Caracterización del receptor del IGF-II.
- Análisis de las vías de unión y señalización del IGF-II.
- Investigación de la función del receptor de manosa-6-fosfato.
Principales resultados:
- Recientemente se identificó que el receptor de IGF-II también se une a la manosa-6-fosfato.
- El receptor de manosa-6-fosfato está involucrado en la orientación de las enzimas lisosomales.
- El estudio plantea la cuestión de si esta única proteína media tanto las respuestas metabólicas de IGF-II como la focalización de la enzima lisosomal.
Conclusiones:
- El receptor de IGF-II tiene una doble función, ya que se une tanto a IGF-II como a la manosa-6-fosfato.
- Se necesitan más investigaciones para dilucidar las funciones metabólicas de IGF-II mediadas por su receptor específico.
- Comprender esta doble función podría revelar nuevos conocimientos sobre la señalización de factores de crecimiento y el tráfico celular.
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