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Journal of Molecular Medicine

, Volume 91, Issue 1, pp 103–115 | Cite as

EphA2-mediated mesenchymal–amoeboid transition induced by endothelial progenitor cells enhances metastatic spread due to cancer-associated fibroblasts

  • Elisa Giannoni
  • Maria Letizia Taddei
  • Matteo Parri
  • Francesca Bianchini
  • Michela Santosuosso
  • Renata Grifantini
  • Gabriella Fibbi
  • Benedetta Mazzanti
  • Lido Calorini
  • Paola ChiarugiEmail author
Original Article

Abstract

Tumor progression is deeply influenced by epigenetic changes induced by tumor stroma. Cancer-associated fibroblasts (CAFs) have been reported to promote epithelial–mesenchymal transition in cancer cells, thereby enhancing their aggressiveness and stem-like properties. As CAFs are able to recruit endothelial progenitor cells (EPCs) to tumor site, we aim to investigate their interplay for prostate carcinoma progression. Both prostate CAFs and cancer cells actively recruit EPCs, known to affect tumor progression through increased vasculogenesis. EPCs synergize with CAFs to further promote epigenetic plasticity of cancer cells, through a mesenchymal-to-amoeboid transition. Indeed, after fibroblasts have engaged epithelial–mesenchymal transition in cancer cells, a further shift towards amoeboid motility is promoted by EPCs through contact-mediated triggering of the bidirectional ephrinA1/EphA2 signaling. The activation of ephrinA1 reverse pathway enhances EPC-induced neo-vascularization, thus promoting tumor growth, while EphA2 forward signaling elicits mesenchymal–amoeboid transition in cancer cells, favoring their adhesion to endothelium, transendothelial migration, and lung metastatic colonization. We therefore underscore that the metastatic advantage given by tumor microenvironment embraces different motility strategies and propose EphA2-targeted tools as useful adjuvants in anti-metastatic treatments.

Keywords

Cancer-associated fibroblasts Endothelial progenitor cells Ephrins Mesenchymal-to-amoeboid transition Vasculogenesis 

Notes

Acknowledgments

This work was supported by the Associazione Italiana Ricerca sul Cancro (AIRC), by Istituto Toscano Tumori and Regione Toscana (TUMAR). We thank Dr. Sergio Serni for prostate surgical specimens and Eugenio Torre for histological analyses.

Conflict of interest

The authors declare no conflict of interest.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Elisa Giannoni
    • 1
  • Maria Letizia Taddei
    • 1
  • Matteo Parri
    • 2
  • Francesca Bianchini
    • 3
  • Michela Santosuosso
    • 4
  • Renata Grifantini
    • 2
  • Gabriella Fibbi
    • 3
  • Benedetta Mazzanti
    • 4
  • Lido Calorini
    • 3
    • 5
  • Paola Chiarugi
    • 1
    • 5
    Email author
  1. 1.Department of Biochemical SciencesUniversity of FlorenceFlorenceItaly
  2. 2.Externautics SpASienaItaly
  3. 3.Department of Experimental Pathology and OncologyUniversity of FlorenceFlorenceItaly
  4. 4.Umbilical Cord Bank of AOU CareggiFlorenceItaly
  5. 5.Istituto Toscano Tumori and “Center for Research, Transfer and High Education DenoTHE”FlorenceItaly

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