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El músculo liso Notch1 media la formación neointimal después de una lesión vascular
Yuxin Li1, Kyosuke Takeshita, Ping-Yen Liu
1Vascular Medicine Research, Brigham and Women's Hospital and Harvard Medical School, Cambridge, MA 02139, USA.
Circulation
|May 13, 2009
Resumen
La señalización de Notch1 en las células del músculo liso vascular impulsa la formación de neointimales después de una lesión. La inhibición de Notch1 reduce significativamente este proceso, lo que sugiere que Notch1 es un objetivo terapéutico para las enfermedades proliferativas vasculares.
Área de la Ciencia:
- Biología Cardiovascular Biología Cardiovascular
- La señalización celular de las células.
- Biología Vascular Biología Vascular
Sus antecedentes:
- Notch1 es crucial para el destino celular, la angiogénesis y el desarrollo cardiovascular.
- Su papel en la lesión vascular postnatal sigue sin estar claro.
- La señalización de Notch1 en las células del músculo liso vascular (SMC) puede promover la formación de neointimales.
Objetivo del estudio:
- Investigar el papel de Notch1 y Notch3 en SMCs durante la formación neointimal después de una lesión vascular.
- Para determinar si la deficiencia de Notch1 en las SMC tiene un impacto en la remodelación vascular.
Principales métodos:
- Ligadura de la arteria carótida en ratones de tipo salvaje, con deficiencia de Notch1 y con deficiencia de Notch3.
- Evaluación de la formación neointimal, la proliferación de SMC, la migración y la apoptosis.
- Análisis de los componentes de la vía de señalización de Notch (CHF1/Hey2).
Principales resultados:
- La deficiencia de Notch1 (heterocigota, específica de SMC) redujo la formación de neointimales en un 70% después de la lesión.
- La deficiencia de Notch3 no afectó la formación neointimal.
- Las SMC deficientes de Notch1 exhibieron una disminución de la proliferación, la migración y un aumento de la apoptosis.
- Notch1 señalización mediada por la proliferación y migración de SMC a través de CHF1/Hey2.2.
Conclusiones:
- Notch1, no Notch3, es el principal mediador de la proliferación de SMC y la formación de neointimales después de la lesión vascular.
- La vía Notch1/CHF1/Hey2 en las SMC es crítica para este proceso.
- Dirigirse a Notch1/CHF1/Hey2 en SMC puede ofrecer beneficios terapéuticos para las enfermedades vasculares proliferativas.
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