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Updated: May 11, 2026
07:41
Three-dimensional Cell Culture Model for Measuring the Effects of Interstitial Fluid Flow on Tumor Cell Invasion
Published on: July 25, 2012
El enlace cruzado de la matriz fuerza la progresión del tumor al mejorar la señalización de la integrina
Kandice R Levental1, Hongmei Yu, Laura Kass
1Department of Bioengineering and Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
Cell
|November 26, 2009
Resumen
La rigidez del tumor, impulsada por el enlace cruzado del colágeno, promueve el cáncer al aumentar las adherencias focales y la actividad de la PI3 quinasa. La reducción de esta conexión cruzada impide la malignidad y reduce la incidencia de tumores en el cáncer de mama.
Área de la Ciencia:
- Oncología Oncología.
- La bioquímica es la bioquímica.
- La biofísica es la biofísica.
Sus antecedentes:
- Los tumores exhiben remodelación y endurecimiento de la matriz extracelular (ECM), pero el papel del endurecimiento en la progresión del cáncer no se entiende completamente.
- Si bien la remodelación del ECM se reconoce en el cáncer, la contribución específica del endurecimiento del ECM a la tumorigénesis requiere una mayor aclaración.
Objetivo del estudio:
- Investigar el papel del enlace cruzado de colágeno y el endurecimiento de la ECM en la progresión del cáncer de mama.
- Determinar el vínculo mecánico entre la rigidez del ECM, las adherencias focales, la señalización de la quinasa PI3 y la malignidad mamaria.
Principales métodos:
- Inducción e inhibición del enlace cruzado de colágeno utilizando lisil oxidasa.
- Evaluación de la rigidez del ECM, las adherencias focales y la actividad de la quinasa PI3 (PI3K).
- Estudios in vivo utilizando modelos de ratón MMTV-Neu para evaluar la incidencia de tumores y la fibrosis.
Principales resultados:
- El enlace cruzado de colágeno condujo a un endurecimiento del ECM, un aumento de las adherencias focales, una mayor actividad de PI3K y promovió la invasión epitelial.
- La inhibición de la señalización de integrina redujo la invasión en el ECM endurecido, mientras que el agrupamiento de integrina promovió las adherencias focales y la señalización PI3K.
- La reducción del enlace cruzado del colágeno mediado por la lisil oxidasa evitó la fibrosis, disminuyó las adherencias focales y la actividad de PI3K, e impidió la malignidad mamaria.
Conclusiones:
- El enlace cruzado del colágeno es un factor clave del endurecimiento del ECM y la fibrosis en la tumorigénesis mamaria.
- El endurecimiento del ECM, mediado por el enlace cruzado del colágeno, promueve las adherencias focales y la señalización de PI3K, impulsando así la progresión del cáncer de mama.
- Dirigirse al enlace cruzado de colágeno mediado por lisil oxidasa representa una estrategia terapéutica potencial para impedir el cáncer de mama maligno.
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