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La transcripción mejorada por receptores nucleares requiere redes de genes dependientes de motores y LSD1 en gránulos
Esperanza Nunez1, Young-Soo Kwon, Kasey R Hutt
1Howard Hughes Medical Institute, University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0651, USA.
Cell
|March 25, 2008
Resumen
La estimulación de ligandos desencadena cambios rápidos en la organización nuclear, formando nuevas interacciones intercromosómicas. Esta reorganización nuclear es esencial para mejorar la transcripción génica, destacando el papel de la arquitectura nuclear 3D en la regulación génica.
Área de la Ciencia:
- Biología celular Biología celular.
- Biología Molecular Biología Molecular
- La genómica es la genómica.
Sus antecedentes:
- Los mecanismos moleculares de la transcripción son bien conocidos.
- La regulación de la organización nuclear 3D para la expresión génica es en gran medida desconocida.
Objetivo del estudio:
- Investigar cómo la organización nuclear regula la transcripción génica en respuesta a eventos de señalización.
- Para identificar los actores moleculares involucrados en los cambios inducidos por ligandos en la arquitectura nuclear.
Principales métodos:
- Se estudiaron las interacciones intercromosómicas inducidas por ligandos.
- Investigó el papel de la actina nuclear / miosina-I, la cadena ligera de dinina 1 (DLC1), los coactivadores y los remodeladores de la cromatina.
- Evaluó la función de la histona lisina desmetilasa LSD1 y los gránulos de intercromatina.
Principales resultados:
- La estimulación de ligandos causa rápidas interacciones intercromosómicas y reorganización nuclear.
- La actina nuclear / miosina-I, DLC1, los coactivadores y los remodeladores de la cromatina son cruciales para este proceso.
- LSD1 dirige los loci de interacción a los gránulos de intercromatina, que son esenciales para la transcripción mejorada de los genes diana de los receptores de estrógeno.
Conclusiones:
- La arquitectura nuclear 3D juega un papel crítico en la orquestación de los programas de expresión génica.
- Las interacciones nucleares dependientes del motor son necesarias para la transcripción genética regulada.
- Los gránulos de intercromatina están involucrados en la regulación de la expresión génica a través de la organización nuclear dinámica.
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