The Epithelial-Mesenchymal Transition Generates Cells With Properties of Stem Cells

Cell. 2008 May 16;133(4):704-15. doi: 10.1016/j.cell.2008.03.027.

Abstract

The epithelial-mesenchymal transition (EMT) is a key developmental program that is often activated during cancer invasion and metastasis. We here report that the induction of an EMT in immortalized human mammary epithelial cells (HMLEs) results in the acquisition of mesenchymal traits and in the expression of stem-cell markers. Furthermore, we show that those cells have an increased ability to form mammospheres, a property associated with mammary epithelial stem cells. Independent of this, stem cell-like cells isolated from HMLE cultures form mammospheres and express markers similar to those of HMLEs that have undergone an EMT. Moreover, stem-like cells isolated either from mouse or human mammary glands or mammary carcinomas express EMT markers. Finally, transformed human mammary epithelial cells that have undergone an EMT form mammospheres, soft agar colonies, and tumors more efficiently. These findings illustrate a direct link between the EMT and the gain of epithelial stem cell properties.

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.

MeSH terms

  • Adult Stem Cells / cytology
  • Animals
  • CD24 Antigen / metabolism
  • Cell Transformation, Neoplastic
  • Cells, Cultured
  • Epithelial Cells / cytology*
  • Humans
  • Hyaluronan Receptors / metabolism
  • Mammary Glands, Animal / cytology*
  • Mammary Glands, Human / cytology*
  • Mesoderm / cytology
  • Mesoderm / metabolism
  • Mice
  • Neoplastic Stem Cells / cytology
  • Spheroids, Cellular
  • Stem Cells / cytology*
  • Tumor Cells, Cultured

Substances

  • CD24 Antigen
  • Hyaluronan Receptors