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Hedgehog regula el crecimiento y la proliferación celular mediante la inducción de ciclina D y ciclina E
Molly Duman-Scheel1, Li Weng, Shijie Xin
1Ben May Institute for Cancer Research and Center for Molecular Oncology, The University of Chicago, 924 E. 57th Street, Chicago, Illinois 60637, USA.
Nature
|May 17, 2002
Resumen
La activación de la señalización Hedgehog (Hh) promueve los reguladores del ciclo celular Cyclin E y Cyclin D, impulsando la replicación del ADN y el crecimiento celular. Este descubrimiento revela cómo la desregulación de la vía Hh contribuye a la formación de tumores.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología del desarrollo Biología del desarrollo.
- Investigación del cáncer Investigación del cáncer.
Sus antecedentes:
- Las mutaciones que activan la vía de señalización Hedgehog (Hh) están implicadas en varios tipos de cáncer.
- Los mecanismos moleculares precisos por los cuales la señalización Hh impulsa la tumorigénesis siguen sin estar claros.
Objetivo del estudio:
- Aclarar el papel de la señalización Hh en la regulación de la progresión del ciclo celular y la formación de tumores.
- Identificar los principales objetivos aguas abajo de la señalización Hh involucrada en el control del ciclo celular.
Principales métodos:
- Cribado genético en Drosophila para identificar los reguladores de la vía del retinoblastoma (Rb).
- Análisis de la expresión génica y la unión del promotor.
- Investigando los efectos de la señalización Hh en los reguladores del ciclo celular Cyclin E y Cyclin D.
Principales resultados:
- La señalización de Hedgehog (Hh) regula la ciclina E y la ciclina D, que son inhibidores de la vía del retinoblastoma (Rb).
- El cubitus interruptus (Ci) que se une al promotor de la ciclina E media la replicación del ADN inducida por Hh.
- La señalización Hh promueve el crecimiento celular a través de la regulación al alza de la ciclina D.
Conclusiones:
- Se ha establecido un vínculo directo entre la señalización de Hh y los reguladores clave del ciclo celular (ciclina E y ciclina D).
- Esto proporciona una visión crítica de los mecanismos subyacentes a la formación de tumores impulsados por Hh.
- Comprender estas vías es crucial para desarrollar terapias dirigidas contra el cáncer.
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