Stem cell-like transcriptional reprogramming mediates metastatic resistance to mTOR inhibition.

Inhibitors of the mechanistic target of rapamycin (mTOR) are currently used to treat advanced metastatic breast cancer. However, whether an aggressive phenotype is sustained through adaptation or resistance to mTOR inhibition remains unknown. Here, complementary studies in human tumors, cancer model...

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Autores: Mateo, F, Arenas, E J, Aguilar, H, Serra-Musach, J, de Garibay, G Ruiz, Boni, J, Maicas, M, Du, S, Iorio, F, Herranz-Ors, C, Islam, A, Prado, X, Llorente, A, Petit, A, Vidal, A, Català, I, Soler, T, Venturas, G, Rojo-Sebastian, A, Serra, H, Cuadras, D, Blanco, I, Lozano, J, Canals, F, Sieuwerts, A M, de Weerd, V, Look, M P, Puertas, S, García, N, Perkins, A S, Bonifaci, N, Skowron, M, Gómez-Baldó, L, Hernández, V, Martínez-Aranda, A, Martínez-Iniesta, M, Serrat, X, Cerón, J, Brunet, J, Barretina, M P, Gil, M, Falo, C, Fernández, A, Morilla, I, Pernas, S, Plà, M J, Andreu, X, Seguí, M A, Ballester, R, Castellà, E, Nellist, M, Morales, S, Valls, J, Velasco, A, Matias-Guiu, X, Figueras, A, Sánchez-Mut, J V, Sánchez-Céspedes, M, Cordero, A, Gómez-Miragaya, J, Palomero, L, Gómez, A, Gajewski, T F, Cohen, E E W, Jesiotr, M, Bodnar, L, Quintela-Fandino, M, López-Bigas, N, Valdés-Mas, R, Puente, X S, Viñals, F, Casanovas, O, Graupera, M, Hernández-Losa, J, Ramón Y Cajal, S, García-Alonso, L, Saez-Rodriguez, J, Esteller, M, Sierra, A, Martín-Martín, N, Matheu, A, Carracedo, A, González-Suárez, E, Nanjundan, M, Cortés, J, Lázaro, C, Odero, M D, Martens, J W M, Moreno-Bueno, G, Barcellos-Hoff, M H, Villanueva, A, Gomis, R R, Pujana, M A
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Instituto de Salud Carlos III (ISCIII)
Repositorio:Repisalud
Idioma:inglés
OAI Identifier:oai:repisalud.isciii.es:20.500.12105/25194
Acceso en línea:https://hdl.handle.net/20.500.12105/25194
Access Level:acceso abierto
Palabra clave:BREAST-CANCER
MAMMARY STEM
MESENCHYMAL TRANSITION
EMBRYONIC STEM
SELF-RENEWAL
EXPRESSION
GENES
PATHWAY
TARGET
MOUSE
Descripción
Sumario:Inhibitors of the mechanistic target of rapamycin (mTOR) are currently used to treat advanced metastatic breast cancer. However, whether an aggressive phenotype is sustained through adaptation or resistance to mTOR inhibition remains unknown. Here, complementary studies in human tumors, cancer models and cell lines reveal transcriptional reprogramming that supports metastasis in response to mTOR inhibition. This cancer feature is driven by EVI1 and SOX9. EVI1 functionally cooperates with and positively regulates SOX9, and promotes the transcriptional upregulation of key mTOR pathway components (REHB and RAPTOR) and of lung metastasis mediators (FSCN1 and SPARC). The expression of EVI1 and SOX9 is associated with stem cell-like and metastasis signatures, and their depletion impairs the metastatic potential of breast cancer cells. These results establish the mechanistic link between resistance to mTOR inhibition and cancer metastatic potential, thus enhancing our understanding of mTOR targeting failure.

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