Illuminating breast cancer invasion: diverse roles for cell-cell interactions

Curr Opin Cell Biol. 2014 Oct;30:99-111. doi: 10.1016/ Epub 2014 Aug 17.


Metastasis begins when tumors invade into surrounding tissues. In breast cancer, the study of cell interactions has provided fundamental insights into this complex process. Powerful intravital and 3D organoid culture systems have emerged that enable biologists to model the complexity of cell interactions during cancer invasion in real-time. Recent studies utilizing these techniques reveal distinct mechanisms through which multiple cancer cell and stromal cell subpopulations interact, including paracrine signaling, direct cell-cell adhesion, and remodeling of the extracellular matrix. Three cell interaction mechanisms have emerged to explain how breast tumors become invasive: epithelial-mesenchymal transition, collective invasion, and the macrophage-tumor cell feedback loop. Future work is needed to distinguish whether these mechanisms are mutually exclusive or whether they cooperate to drive metastasis.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Animals
  • Breast Neoplasms / metabolism
  • Breast Neoplasms / pathology*
  • Cell Communication*
  • Epithelial-Mesenchymal Transition
  • Extracellular Matrix / metabolism
  • Humans
  • Neoplasm Invasiveness
  • Neoplasm Metastasis