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Una vía común de transducción de señal nuclear activada por el factor de crecimiento y los receptores de citoquinas
H B Sadowski1, K Shuai, J E Darnell
1Cold Spring Harbor Laboratory, NY 11724.
Science (New York, N.Y.)
|September 24, 1993
Resumen
Diferentes receptores celulares, como el factor de crecimiento epidérmico (EGF) y las interleucinas, pueden desencadenar vías genéticas comunes. Esto permite que las células respondan a varias señales mediante la activación selectiva de factores de transcripción específicos.
Área de la Ciencia:
- Biología celular Biología celular.
- La señalización molecular.
- Regulación genética La regulación genética.
Sus antecedentes:
- Los receptores de superficie celular median diversas respuestas celulares a estímulos externos como factores de crecimiento y citoquinas.
- Los receptores con propiedades bioquímicas distintas pueden inducir resultados biológicos similares o únicos, lo que indica mecanismos de señalización downstream compartidos.
Objetivo del estudio:
- Para investigar cómo distintos receptores de superficie celular activan conjuntos de genes comunes.
- Comprender el papel de los factores de transcripción citoplasmática latente en la mediación de estas respuestas.
- Para explorar la regulación diferencial de la expresión génica por varios ligandos.
Principales métodos:
- Investigó la fosforilación de la tirosina de los factores de transcripción citoplasmáticos latentes.
- Se analizaron las especificidades de unión al ADN de los factores de transcripción activados por diferentes ligandos.
- Comparó la activación del conjunto de genes por el factor de crecimiento epidérmico, el interferón-gamma y la interleucina-6.
Principales resultados:
- El factor de crecimiento epidérmico, el interferón-gamma y la interleucina-6 activaron los factores de transcripción citoplasmática latente.
- Estos factores reconocieron elementos similares de ADN, lo que indica una vía común.
- Diferentes ligandos indujeron patrones distintos de factores de transcripción con especificidades únicas de unión al ADN.
- Esta activación diferencial se produjo tanto en los mismos como en diferentes tipos de células.
Conclusiones:
- Los receptores de superficie celular no relacionados pueden converger en una vía común de transducción de señales nucleares.
- La utilización diferencial de las proteínas citoplasmáticas latentes permite la regulación de los conjuntos de genes comunes y únicos.
- Este mecanismo proporciona una base para la forma en que diversas señales extracelulares se traducen en respuestas celulares específicas.
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