title: Snail1-Dependent Activation of Cancer-Associated Fibroblast Controls Epithelial Tumor Cell Invasion and Metastasis.
abstract: Snail1 transcriptional factor is essential for triggering epithelial-to-mesenchymal transition (EMT) and inducing tumor cell invasion. We report here an EMT-independent action of Snail1 on tumor invasion, as it is required for the activation of cancer-associated fibroblasts (CAF). Snail1 expression in fibroblasts requires signals derived from tumor cells, such as TGFβ; reciprocally, in fibroblasts, Snail1 organizes a complex program that stimulates invasion of epithelial cells independent of the expression of Snail1 in these cells. Epithelial cell invasion is stimulated by the secretion by fibroblast of diffusible signaling molecules, such as prostaglandin E2The capability of human or murine CAFs to promote tumor invasion is dependent on Snail1 expression. Inducible Snail1 depletion in mice decreases the invasion of breast tumors; moreover, epithelial tumor cells coxenografted with Snail1-depleted fibroblasts originated tumors with lower invasion than those transplanted with control fibroblasts. Therefore, these results demonstrate that the role of Snail1 in tumor invasion is not limited to EMT, but it is also dependent on its activity in stromal fibroblasts, where it orchestrates the cross-talk with epithelial tumor cells. Cancer Res; 76(21); 6205-17. ©2016 AACR.
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
authors: Lorena
authors: L
authors: Alba-Castellón
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
authors: Rubén
authors: R
authors: Olivera-Salguero
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
authors: Aida
authors: A
authors: Mestre-Farrera
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
authors: Raúl
authors: R
authors: Peña
authors: Servicio de Oncología Médica, Hospital Puerta de Hierro, Majadahonda, Spain.
authors: Mercedes
authors: M
authors: Herrera
authors: Centro de Estudios Biosanitarios, Madrid, Spain.
authors: Félix
authors: F
authors: Bonilla
authors: Centro de Investigaciones Biológicas, CSIC, Madrid, Spain.
authors: J Ignacio
authors: JI
authors: Casal
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
authors: Josep
authors: J
authors: Baulida
authors: Servicio de Oncología Médica, Hospital Puerta de Hierro, Majadahonda, Spain.
authors: Cristina
authors: C
authors: Peña
authors: Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain. agarcia@imim.es.|Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Barcelona, Spain.
authors: Antonio
authors: A
authors: García de Herreros
mesh_terms: D000818:Animals; D000072645:Cancer-Associated Fibroblasts / Q000502:physiology*; D045744:Cell Line, Tumor; D015232:Dinoprostone / Q000378:metabolism; D058750:Epithelial-Mesenchymal Transition; D006801:Humans; D051379:Mice; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D009375:Neoplasms, Glandular and Epithelial / Q000473:pathology*; D000071250:Snail Family Transcription Factors / Q000502:physiology*; D016212:Transforming Growth Factor beta / Q000494:pharmacology
chemical_list: C000604407:SNAI1 protein, human; D000071250:Snail Family Transcription Factors; D016212:Transforming Growth Factor beta; D015232:Dinoprostone