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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
Published on: September 20, 2018
Una nueva función del dominio transformador de E1a: represión de la actividad AP-1
R Offringa1, S Gebel, H van Dam
1Sylvius Laboratories, Laboratory for Molecular Carcinogenesis, University of Leiden, The Netherlands.
Cell
|August 10, 1990
Resumen
La proteína E1a del adenovirus suprime de manera única la transcripción génica de la collagenasa al inhibir el factor de transcripción AP-1. Esta represión, dependiente de la E1a, fue
Área de la Ciencia:
- Biología molecular La biología molecular.
- Oncología Oncología.
- Virología Virología.
Sus antecedentes:
- El adenovirus E1a es una proteína oncogénica clave.
- AP-1 es un factor de transcripción crucial que regula la expresión génica de la collagenasa.
- El elemento sensible al éster del forbol (collTRE) es el mediador de esta regulación.
Objetivo del estudio:
- Investigar el mecanismo por el cual el adenovirus E1a reprime la transcripción génica de la collagenasa.
- Determinar el papel de AP-1 en la represión mediada por E1a.
- Para identificar el dominio específico de E1a responsable de esta función.
Principales métodos:
- Ensayos de genes reporteros para medir la transcripción genética de la collagenasa.
- Western blotting para evaluar la síntesis de proteínas AP-1 y la unión al ADN.
- Análisis de regiones conservadas de E1a para mapear dominios funcionales.
Principales resultados:
- El adenovirus E1a reprime la transcripción del gen de la collagenasa a través del collTRE.
- E1a inhibe la función trans-activadora de AP-1 sin afectar su síntesis, unión al ADN o composición.
- La represión depende de la región 1 conservada de E1a, un dominio transformador conocido.
Conclusiones:
- El adenovirus E1a posee una capacidad única entre los oncogenes dominantes para desmodular AP-1.
- Este mecanismo de represión es una parte integral de la transformación celular mediada por el adenovirus.
- Dirigirse a la interacción E1a-AP-1 podría ofrecer nuevas estrategias terapéuticas en los cánceres relacionados con el adenovirus.
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