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Los canales de calcio expresados en el músculo liso vascular
1Department of Medicine, Mount Sinai School of Medicine, New York, N.Y. 10029.
Circulation
|December 1, 1992
Resumen
La regulación intracelular del calcio impacta la expresión génica y las funciones celulares. Los receptores de inositol 1,4,5-trisfosfato (IP3R) y los receptores de ryanodina (RYR) son canales clave de liberación de calcio en las células musculares lisas vasculares.
Área de la Ciencia:
- Biología celular Biología celular.
- Biología Molecular Biología Molecular
- Investigaciones Cardiovasculares Investigación Cardiovascular Investigaciones Cardiovasculares
Sus antecedentes:
- Los niveles intracelulares de calcio regulan las vías de transducción de señales y la expresión génica.
- La afluencia y liberación de calcio son fundamentales para las funciones vasculares de las células del músculo liso, como la contracción y la proliferación.
Objetivo del estudio:
- Para investigar las funciones de los diferentes canales de calcio en las células del músculo liso vascular.
- Para identificar los principales canales intracelulares de liberación de calcio en el músculo liso vascular.
Principales métodos:
- Análisis de la expresión génica relacionada con la señalización del calcio.
- Caracterización de los canales de calcio dependientes de la tensión y los canales intracelulares de liberación de calcio (IP3R y RYR) en las células del músculo liso vascular.
Principales resultados:
- Los canales de calcio dependientes de la tensión regulan la concentración de calcio en el citoplasma tras la despolarización del plasmalema.
- Los receptores de inositol 1,4,5-trisfosfato (IP3R) son los principales canales intracelulares de liberación de calcio en el músculo liso vascular, activados por el IP3.
- Los receptores de ryanodina (RYR) están presentes, pero en niveles más bajos en el músculo liso vascular en comparación con los músculos estriados.
Conclusiones:
- IP3R y RYR son miembros de la familia de genes que codifican los canales de liberación de calcio intracelular.
- IP3R juega un papel importante en la mediación de las respuestas celulares, incluida la contracción del músculo liso.
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