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Factores de crecimiento de acción local para las células del músculo liso vascular: síntesis endógena y liberación de
Circulation
|October 1, 1985
Resumen
El factor de crecimiento derivado de plaquetas (PDGF) y las moléculas similares al PDGF (PDGF-c) estimulan la proliferación celular en la reparación de tejidos y la aterosclerosis. Las células de la pared de los vasos sanguíneos, especialmente después de una lesión, pueden sintetizar PDGF-c, lo que contribuye a la proliferación celular del músculo liso.
Área de la Ciencia:
- Biología Vascular Biología Vascular
- Proliferación de las células Proliferación celular
- La bioquímica es la bioquímica.
Sus antecedentes:
- El factor de crecimiento derivado de plaquetas (PDGF) está implicado en la reparación de tejidos y la formación de lesiones ateroscleróticas.
- Las plaquetas contienen PDGF, factor de crecimiento epidérmico y factor de crecimiento transformador, que actúan potencialmente sinérgicamente.
- Las células de la pared del vaso pueden sintetizar moléculas similares al PDGF (PDGF-c) bajo condiciones específicas.
Objetivo del estudio:
- Investigar el papel de la síntesis endógena de PDGF-c en la proliferación vascular de las células del músculo liso.
- Para determinar si las células de la pared de los vasos, incluidas las células endoteliales y del músculo liso, producen PDGF-c.
- Evaluar la contribución del PDGF-c a la proliferación de células del músculo liso después de una lesión vascular.
Principales métodos:
- Cultivo de células endoteliales arteriales y células del músculo liso aórtico de ratas.
- Estimulación de las células endoteliales con trombina.
- Evaluación de la actividad mitogénica en medios acondicionados utilizando células 3T3.
- Análisis de las células del músculo liso de las arterias carótidas de ratas lesionadas por un globo.
Principales resultados:
- Las células endoteliales arteriales secretan PDGF-c, con una liberación estimulada significativamente por la trombina.
- Las células del músculo liso aórtico de ratas jóvenes secretan niveles significativos de PDGF-c, que representan toda la actividad mitogénica.
- Las células del músculo liso aórtico de la rata adulta secretan sustancialmente menos PDGF-c.
- Las células del músculo liso de las arterias carótidas lesionadas de la rata secretan PDGF-c en cultivo.
Conclusiones:
- La síntesis endógena de PDGF-c por las células de la pared vascular es un potencial contribuyente a la proliferación de las células del músculo liso.
- La producción de PDGF-c por las células del músculo liso puede desempeñar un papel en la respuesta a la lesión vascular.
- Estos hallazgos resaltan el complejo papel del PDGF-c en la salud y enfermedad vascular.
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