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Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors
Published on: October 26, 2015
p21 es un inhibidor universal de las cinasas ciclinas
1Howard Hughes Medical Institute, Cold Spring Harbor Laboratory, New York 11724.
Nature
|December 16, 1993
Resumen
La proteína p21 actúa como un inhibidor universal de las cinasas dependientes de ciclina (CDK), cruciales para regular la proliferación celular. Su pérdida en las células transformadas sugiere un papel clave en el desarrollo del cáncer y el control del ciclo celular.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
- Oncología Oncología.
Sus antecedentes:
- La desregulación de la proliferación celular es una característica clave de la transformación neoplásica.
- Las vías alteradas de control del crecimiento afectan a la maquinaria del ciclo celular, pero los mecanismos siguen sin estar claros.
- Las oncoproteínas virales inducen cambios en los complejos de cinasa dependiente de ciclina (CDK) en las células transformadas.
Objetivo del estudio:
- Investigar la importancia del antígeno nuclear celular proliferante (PCNA) y la pérdida de p21 en los complejos CDK celulares transformados.
- Para aclarar el papel de p21 en la regulación del ciclo celular.
- Para reconstituir complejos quinasa del ciclo celular cuaternario in vitro.
Principales métodos:
- La clonación molecular del gen p21.
- Reconstitución in vitro de complejos quinasa del ciclo celular cuaternario.
- Ensayos para determinar el efecto de p21 en la actividad ciclina/CDK y la proliferación celular.
Principales resultados:
- p21 fue clonado y su papel en la regulación del ciclo celular investigado.
- Se encontró que p21 inhibe la actividad de todos los miembros de la familia de ciclina / CDK probados.
- La sobreexpresión de p21 inhibió la proliferación en las células de mamíferos.
Conclusiones:
- p21 actúa como un inhibidor universal de las cinasas ciclinas.
- La pérdida de p21 de los complejos CDK en las células transformadas puede contribuir a la proliferación incontrolada.
- p21 es un regulador crítico del ciclo celular y un objetivo potencial en la terapia del cáncer.
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