Cancer and Metastasis Reviews

, Volume 28, Issue 3, pp 335–344

Role of epithelial-to-mesenchymal transition (EMT) in drug sensitivity and metastasis in bladder cancer

  • David J. McConkey
  • Woonyoung Choi
  • Lauren Marquis
  • Frances Martin
  • Michael B. Williams
  • Jay Shah
  • Robert Svatek
  • Aditi Das
  • Liana Adam
  • Ashish Kamat
  • Arlene Siefker-Radtke
  • Colin Dinney
Article

DOI: 10.1007/s10555-009-9194-7

Cite this article as:
McConkey, D.J., Choi, W., Marquis, L. et al. Cancer Metastasis Rev (2009) 28: 335. doi:10.1007/s10555-009-9194-7

Abstract

Epithelial-to-mesenchymal transition (EMT) is a process that plays essential roles in development and wound healing that is characterized by loss of homotypic adhesion and cell polarity and increased invasion and migration. At the molecular level, EMT is characterized by loss of E-cadherin and increased expression of several transcriptional repressors of E-cadherin expression (Zeb-1, Zeb-2, Twist, Snail, and Slug). Early work established that loss of E-cadherin and increased expression of MMP-9 was associated with a poor clinical outcome in patients with urothelial tumors, suggesting that EMT might also be associated with bladder cancer progression and metastasis. More recently, we have used global gene expression profiling to characterize the molecular heterogeneity in human urothelial cancer cell lines (n = 20) and primary patient tumors, and unsupervised clustering analyses revealed that the cells naturally segregate into two discrete “epithelial” and “mesenchymal” subsets, the latter consisting entirely of muscle-invasive tumors. Importantly, sensitivity to inhibitors of the epidermal growth factor receptor (EGFR) or type-3 fibroblast growth factor receptor (FGFR3) was confined to the “epithelial” subset, and sensitivity to EGFR inhibitors could be reestablished by micro-RNA-mediated molecular reversal of EMT. The results suggest that EMT coordinately regulates drug resistance and muscle invasion/metastasis in urothelial cancer and is a dominant feature of overall cancer biology.

Keywords

Epithelial-to-mesenchymal transition Epidermal growth factor receptor Type-3 fibroblast growth factor receptor Micro-RNA-mediated molecular reversal Urothelial tumor 

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • David J. McConkey
    • 1
    • 2
  • Woonyoung Choi
    • 1
    • 2
  • Lauren Marquis
    • 1
    • 2
  • Frances Martin
    • 1
  • Michael B. Williams
    • 1
  • Jay Shah
    • 1
  • Robert Svatek
    • 1
  • Aditi Das
    • 1
    • 2
  • Liana Adam
    • 1
    • 2
  • Ashish Kamat
    • 1
  • Arlene Siefker-Radtke
    • 3
  • Colin Dinney
    • 1
  1. 1.Department of UrologyU.T. M.D. Anderson Cancer CenterHoustonUSA
  2. 2.Department of Cancer BiologyU.T. M.D. Anderson Cancer CenterHoustonUSA
  3. 3.Department of Genitourinary Medical OncologyU.T. M.D. Anderson Cancer CenterHoustonUSA