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MSC-Regulated MicroRNAs Converge on the Transcription Factor FOXP2 and Promote Breast Cancer Metastasis

Authors
  • Benjamin G. Cuiffo
  • Antoine Campagne1, 2
  • George W. Bell
  • Antonio Lembo
  • Francesca Orso
  • Evan C. Lien
  • Manoj K. Bhasin
  • Monica Raimo
  • Summer E. Hanson
  • Andriy Marusyk
  • Dorraya El-Ashry
  • Peiman Hematti
  • Kornelia Polyak
  • Fatima Mechta-Grigoriou
  • Odette Mariani
  • Stefano Volinia
  • Anne Vincent-Salomon
  • Daniela Taverna
  • Antoine E. Karnoub
Type
Published Article
Journal
Cell Stem Cell
Publisher
Elsevier
Volume
15
Issue
6
Pages
762–774
Identifiers
DOI: 10.1016/j.stem.2014.10.001
Source
CdV-UPMC
Keywords
License
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Abstract

Mesenchymal stem/stromal cells (MSCs) are progenitor cells shown to participate in breast tumor stroma formation and to promote metastasis. Despite expanding knowledge of their contributions to breast malignancy, the underlying molecular responses of breast cancer cells (BCCs) to MSC influences remain incompletely understood. Here, we show that MSCs cause aberrant expression of microRNAs, which, led by microRNA-199a, provide BCCs with enhanced cancer stem cell (CSC) properties. We demonstrate that such MSC-deregulated microRNAs constitute a network that converges on and represses the expression of FOXP2, a forkhead transcription factor tightly associated with speech and language development. FOXP2 knockdown in BCCs was sufficient in promoting CSC propagation, tumor initiation, and metastasis. Importantly, elevated microRNA-199a and depressed FOXP2 expression levels are prominent features of malignant clinical breast cancer and are associated significantly with poor survival. Our results identify molecular determinants of cancer progression of potential utility in the prognosis and therapy of breast cancer.

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