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Regulación independiente de la codificación del supresor tumoral PTEN por medio de ARNm endógenos competidores
Yvonne Tay1, Lev Kats, Leonardo Salmena
1Cancer Genetics Program, Division of Genetics, Beth Israel Deaconess Cancer Center, Department of Medicine and Pathology, Harvard Medical School, Boston, MA 02115, USA.
Cell
|October 18, 2011
Resumen
Los ARN codificantes de proteínas, conocidos como ARN endógenos competidores (ceRNA), interactúan compartiendo microARN. Este estudio identifica ceRNAs que regulan el supresor tumoral PTEN, impactando el crecimiento del cáncer y las vías de señalización.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- Investigación de Investigación del Cáncer.
Sus antecedentes:
- Las transcripciones de ARN codificantes de proteínas pueden interactuar a través de la competencia de microARN.
- Los ARN endógenos competidores (ceARN) son una clase recientemente identificada de reguladores de ARN.
- PTEN es un gen supresor de tumores crucial implicado en la tumorigénesis.
Objetivo del estudio:
- Demostrar y caracterizar el cruce entre ARN codificantes de proteínas a través de la competencia de microARN.
- Para identificar y validar los ceRNAs que regulan la expresión y la función de PTEN.
- Explorar el papel de los ceRNA en el desarrollo y la progresión del cáncer.
Principales métodos:
- Análisis computacional para predecir posibles ceRNAs.
- Validación experimental de las interacciones de ceRNA identificadas.
- Análisis de la expresión génica y los datos del número de copias en muestras de cáncer.
Principales resultados:
- Identificaron transcripciones endógenas codificadoras de proteínas que actúan como ARN ce para PTEN.
- Se ha validado que estos ceRNA regulan PTEN, antagonizan la señalización PI3K/AKT y poseen propiedades supresoras de tumores.
- Se observaron patrones de expresión concordantes y pérdida de número de copias de estos ceRNA con PTEN en cánceres.
Conclusiones:
- Los ARNm codificantes de proteínas pueden funcionar como ARNm ce, regulando la expresión génica a través de la competencia de microARN.
- Las redes de ceRNA juegan un papel importante en el cáncer, particularmente en relación con la actividad supresora de tumores PTEN.
- Este estudio proporciona un marco para predecir y validar la actividad y las redes de ceRNA.
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