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Netrin-1 controla la tumorigénesis colorrectal mediante la regulación de la apoptosis
Laetitia Mazelin1, Agnès Bernet, Christelle Bonod-Bidaud
1Apoptosis/Differentiation Laboratory-Equipe labellisée La Ligue-Molecular and Cellular Genetic Center, CNRS UMR 5534, University of Lyon, 69622 Villeurbanne, France.
Nature
|September 3, 2004
Resumen
La unión de Netrin-1 a su receptor DCC (borrado en el cáncer colorrectal) previene la muerte celular, promoviendo el desarrollo de tumores intestinales. Esto sugiere que el DCC y sus receptores actúan como supresores tumorales condicionales, impactando la progresión del cáncer.
Área de la Ciencia:
- Oncología Oncología.
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
Sus antecedentes:
- La expresión de la proteína eliminada en el cáncer colorrectal (DCC) se reduce en muchos tipos de cáncer, lo que sugiere una función supresora de tumores.
- Existen dudas con respecto a la función supresora de tumores del DCC debido a las mutaciones raras y la falta de predisposición en ratones mutantes.
- El DCC actúa como un receptor de dependencia, induciendo la apoptosis a menos que se una a su ligando, la netrina-1.
Objetivo del estudio:
- Para investigar el papel de netrin-1 en el desarrollo de tumores intestinales.
- Para determinar si la señalización de la netrina-1 influye en la supervivencia celular y la progresión del cáncer.
Principales métodos:
- Expresión forzada de la netrina-1 en el tracto gastrointestinal del ratón.
- Análisis de la formación de tumores en ratones mutantes de tipo salvaje y poliposis coli adenomatosa (APC) con expresión forzada de netrina-1.
Principales resultados:
- La expresión forzada de netrina-1 condujo a lesiones hiperplásticas y neoplásicas espontáneas en el intestino del ratón.
- En ratones mutantes de APC, la expresión forzada de netrina-1 dio lugar a adenocarcinomas agresivos.
- Netrin-1 parece promover el desarrollo de tumores intestinales regulando la supervivencia celular.
Conclusiones:
- La señalización de Netrin-1 puede impulsar el desarrollo de tumores intestinales.
- Los receptores de netrina-1 funcionan como supresores tumorales condicionales, regulando la supervivencia celular en el contexto del cáncer.
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