Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies

  • Authors:
    • Rosario S. Rivera
    • Mehmet Gunduz
    • Hitoshi Nagatsuka
    • Esra Gunduz
    • Beyhan Cengiz
    • Kunihiro Fukushima
    • Levent Bekir Beder
    • Davut Pehlivan
    • Noboru Yamanaka
    • Kenji Shimizu
    • Noriyuki Nagai
  • View Affiliations

  • Published online on: May 1, 2008     https://doi.org/10.3892/or.19.5.1079
  • Pages: 1079-1084
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Abstract

EphA2 is a 130-kDa transmembrane protein primarily found in adult human epithelial cells and is a member of one of the largest receptor tyrosine kinases. It is located on 1p36.1, a genetic hot spot in cancer. EphA2 overexpression has been observed in aggressive solid tumors and its potential role in tumorigenesis, which includes cell growth, survival, migration and angiogenesis have been reported. However, the role of EphA2 remains unknown in head and neck cancer. In this study, we investigated the genetic profile of EphA2 in primary head and neck squamous cell carcinoma (HNSCC) by determining mRNA level, status of loss of heterozygosity and protein expression. mRNA expression was also correlated with clinicopathological data. Infrequent loss of heterozygosity (20%) was observed, though a 10-fold increase of mRNA expression in tumors compared to normal tissues was noted. A significant number of samples with normal to high mRNA expression was observed among patients with regional metastasis, with T3-T4 tumor size and with moderate to poor differentiation. However, statistical studies did not show any correlation between mRNA expression and any of the clinicopathological parameters. Tumor cells expressed EphA2 protein, but only weakly. These results suggest that EphA2 might be involved in the early development of HNSCC although not directly responsible for its progression.

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May 2008
Volume 19 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Rivera RS, Gunduz M, Nagatsuka H, Gunduz E, Cengiz B, Fukushima K, Beder LB, Pehlivan D, Yamanaka N, Shimizu K, Shimizu K, et al: Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies. Oncol Rep 19: 1079-1084, 2008
APA
Rivera, R.S., Gunduz, M., Nagatsuka, H., Gunduz, E., Cengiz, B., Fukushima, K. ... Nagai, N. (2008). Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies. Oncology Reports, 19, 1079-1084. https://doi.org/10.3892/or.19.5.1079
MLA
Rivera, R. S., Gunduz, M., Nagatsuka, H., Gunduz, E., Cengiz, B., Fukushima, K., Beder, L. B., Pehlivan, D., Yamanaka, N., Shimizu, K., Nagai, N."Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies". Oncology Reports 19.5 (2008): 1079-1084.
Chicago
Rivera, R. S., Gunduz, M., Nagatsuka, H., Gunduz, E., Cengiz, B., Fukushima, K., Beder, L. B., Pehlivan, D., Yamanaka, N., Shimizu, K., Nagai, N."Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies". Oncology Reports 19, no. 5 (2008): 1079-1084. https://doi.org/10.3892/or.19.5.1079