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Papel de p27 (Kip1) en la migración de las células del músculo liso vascular
1Cardiology Division, Center for Molecular Cardiology, Department of Medicine, Columbia University College of Physicians and Surgeons, Mount Sinai School of Medicine, New York, NY, USA.
Circulation
|June 20, 2001
Resumen
El inhibidor de la cinasa dependiente de la ciclina p27 (Kip1) es crucial para la capacidad de la rapamicina para inhibir la migración de las células musculares lisas. Su ausencia reduce significativamente los efectos antimigratorios de la rapamicina, destacando su papel en la regulación del movimiento celular.
Área de la Ciencia:
- Biología Vascular Biología Vascular
- La señalización celular de las células.
- Farmacología Farmacología.
Sus antecedentes:
- La rapamicina inhibe la proliferación y migración de las células del músculo liso (SMC).
- La inhibición de la proliferación de SMC por la rapamicina implica la regulación hacia arriba de p27 (Kip1).
- p27(Kip1) juega un papel en los efectos antiproliferativos de la rapamicina.
Objetivo del estudio:
- Investigar el papel de p27 (Kip1) en la mediación de los efectos antimigratorios de la rapamicina en las SMC.
- Para determinar si p27 (((Kip1) es esencial para la inhibición inducida por la rapamicina de la migración de SMC.
Principales métodos:
- Evaluación del efecto de la rapamicina en la migración de SMC inducida por el factor de crecimiento de los fibroblastos básicos en células de tipo salvaje (WT) y p27 (Kip1) utilizando una cámara de Boyden modificada.
- Evaluación del impacto de la rapamicina en la migración explantada del SMC aórtico en ratones WT, p27(+/-), y p27(-/-.
Principales resultados:
- La rapamicina, dependiendo de la dosis, inhibió la migración del SMC WT pero no la migración del SMC p27
- La administración sistémica de rapamicina inhibió significativamente la migración de SMC en ratones WT y p27 (Kip1) en un 90%.
- Los ratones no mostraron inhibición significativa de la migración de SMC en respuesta a la rapamicina.
Conclusiones:
- La ausencia de p27 (Kip1) disminuye el efecto inhibidor de la rapamicina en la migración de SMC.
- p27(Kip1) está implicado en las vías de señalización que rigen la migración de SMC.
- p27(Kip1) es un mediador clave de la acción antimigratoria de la rapamicina en las células del músculo liso.
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