Epithelial-mesenchymal transition induced by the stromal cell-derived factor-1/CXCR4 system in oral squamous cell carcinoma cells

  • Authors: Tomitaro Onoue, Daisuke Uchida, Nasima Mila Begum, Yoshifumi Tomizuka, Hideo Yoshida, Mitsunobu Sato
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  • Published online on: Wednesday, November 1, 2006
  • Pages: 1133-1138
  • DOI: 10.3892/ijo.29.5.1133

Abstract

Epithelial-mesenchymal transition (EMT) refers to critical events occasionally observed during tumor progression, including invasion and metastasis, by which cancer cells acquire a fibroblast-like phenotype. Since the stromal cell-derived factor-1 (SDF-1)/CXCR4 system can facilitate lymph node metastasis in oral squamous cell carcinoma (SCC), we have explored the possibility that this system might be involved in EMT. Oral SCC cells, B88 and HNt, which have functional CXCR4 and lymph node metastatic potential, were found to lose their epithelial cell morphology due to SDF-1. In this context, the downregulation of epithelial markers, cytokeratin, E-cadherin and β-catenin, and the upregulation of mesenchymal marker, vimentin and snail were detected. Furthermore, upregulation of vimentin by treatment with SDF-1 was impaired by phosphatidylinositol 3 kinase (PI3K) inhibitor Wortmannin, but not by mitogen-activated protein kinase/extracellular signal-regulated kinase inhibitor U0126. In the type I collagen embedding culture, SDF-1-treated B88 cells formed protruding extensions, but the effect was impaired by treatment with Wortmannin. These results suggested that EMT induced by the SDF-1/CXCR4 system might be involved in the lymph node metastasis of oral SCCs via activation of PI3K-Akt/PKB pathway.
Journal Cover

November 2006
Volume 29 Issue 5

Print ISSN: 1019-6439
Online ISSN:1791-2423

2012 Impact Factor: 2.657
Ranked #31/196 Oncology
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APA
Onoue, T., Uchida, D., Begum, N., Tomizuka, Y., Yoshida, H., & Sato, M. (2006). Epithelial-mesenchymal transition induced by the stromal cell-derived factor-1/CXCR4 system in oral squamous cell carcinoma cells. International Journal of Oncology, 29(5), 1133-1138.
MLA
Onoue, Uchida, Begum, Tomizuka, Yoshida, and Mitsunobu Sato. "Epithelial-mesenchymal transition induced by the stromal cell-derived factor-1/CXCR4 system in oral squamous cell carcinoma cells." International Journal of Oncology International Journal of Oncology 29.5 (2006): 1133-1138.
Chicago
Onoue, Uchida, Begum, Tomizuka, Yoshida, and Mitsunobu Sato. "Epithelial-mesenchymal transition induced by the stromal cell-derived factor-1/CXCR4 system in oral squamous cell carcinoma cells." International Journal of Oncology International Journal of Oncology 29 no. 5 (2006): 1133-1138.