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Updated: May 14, 2026
06:09
Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
Mutaciones promotoras de TERT muy recurrentes en el melanoma humano
Franklin W Huang1, Eran Hodis, Mary Jue Xu
1Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
Science (New York, N.Y.)
|January 26, 2013
Resumen
Se identificaron dos nuevas mutaciones en el promotor de la telomerasa transcriptasa inversa (TERT) en el 71% de los melanomas, aumentando la actividad génica. Estos hallazgos sugieren que las mutaciones en las regiones reguladoras de los genes son un mecanismo significativo en el desarrollo del cáncer.
Área de la Ciencia:
- Oncología Oncología.
- Genética La genética.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La secuenciación sistemática de los genomas del cáncer humano ha identificado principalmente mutaciones en genes codificadores de proteínas, con menos énfasis en las regiones reguladoras de los genes.
- El gen de la telomerasa transcriptasa inversa (TERT) es crucial para el mantenimiento de los telómeros y está implicado en el cáncer.
- Comprender las mutaciones en las regiones reguladoras es clave para descubrir nuevos mecanismos de cáncer.
Objetivo del estudio:
- Identificar y caracterizar mutaciones en el promotor del gen TERT en cánceres humanos.
- Para investigar el impacto funcional de estas mutaciones en la transcripción del gen TERT.
- Para determinar la prevalencia de estas mutaciones en varios tipos de cáncer.
Principales métodos:
- Secuenciación del genoma completo de muestras de melanoma.
- Reporter ensayos para evaluar el impacto de las mutaciones en la actividad del promotor de TERT.
- Cribado de diversas líneas celulares de cáncer para las mutaciones identificadas.
Principales resultados:
- Se identificaron dos mutaciones distintas en el promotor central del gen TERT, que ocurre en el 71% de los melanomas analizados.
- Estas mutaciones crean nuevos sitios de unión para los factores de transcripción E-veintiséis (ETS).
- Los ensayos de Reporter demostraron un aumento de dos a cuatro veces en la actividad transcripcional del promotor mutado de TERT.
- Las mismas mutaciones se encontraron en el 16% de diversas líneas celulares de cáncer, con una frecuencia notable en cánceres de vejiga y hepatocelulares.
Conclusiones:
- Las mutaciones somáticas en el promotor TERT son un evento frecuente en el melanoma y otros cánceres.
- Estas mutaciones mejoran la transcripción del gen TERT, contribuyendo potencialmente a la tumorigénesis.
- Las mutaciones en las regiones reguladoras de los genes representan un mecanismo importante, previamente subestimado, en el desarrollo del cáncer.
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