Overexpression of the receptor for hyaluronan-mediated motility, correlates with expression of microtubule-associated protein in human oral squamous cell carcinomas

  • Authors:
    • Hideo Shigeishi
    • Shinichi Fujimoto
    • Misato Hiraoka
    • Shigehiro Ono
    • Masayuki Taki
    • Kouji Ohta
    • Koichiro Higashikawa
    • Nobuyuki Kamata
  • View Affiliations

  • Published online on: June 1, 2009     https://doi.org/10.3892/ijo_00000286
  • Pages: 1565-1571
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Abstract

Receptor for hyaluronan-mediated motility (RHAMM) has previously been characterized as a cell surface receptor for hyaluronan and a microtubule-associated intracellular hyaluronan binding protein. We examined the expression of RHAMM mRNA in 43 oral squamous cell carcinomas (SCCs) and 7 normal gingivae by real-time RT-PCR. The expression level of RHAMM mRNA was significantly higher in oral SCCs than normal gingivae (P=0.0047). Forty out of 43 oral SCCs showed expression of RHAMM splice variant (48 bp deletion). We immunohistochemically confirmed the protein expression of RHAMM in oral SCCs with higher levels of RHAMM mRNA. Patients with oral SCC who had high RHAMM expression had shorter survival rates than patients with low expression. However, it was not statistically significant. It has been reported that RHAMM interacts with spindle assembly factors such as microtubule-associated protein (TPX2). To investigate the expression of microtubule-associated protein in oral SCCs, mRNA expression of TPX2 was also examined by real-time RT-PCR. The expression level of TPX2 mRNA was significantly higher in oral SCCs than normal gingivae (P=0.046). Furthermore, a significant correlation between the mRNA expression levels of TPX2 and RHAMM was recognized (P=0.011). The results indicate that there is a strong correlation between the mRNA expression levels of TPX2 and RHAMM in oral SCCs. Our observations suggest that the up-regulations of human RHAMM and TPX2 gene correlate with the malignant condition and might be linked to the increased or abnormal cell proliferation in human oral SCCs.

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June 2009
Volume 34 Issue 6

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

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Spandidos Publications style
Shigeishi H, Fujimoto S, Hiraoka M, Ono S, Taki M, Ohta K, Higashikawa K and Kamata N: Overexpression of the receptor for hyaluronan-mediated motility, correlates with expression of microtubule-associated protein in human oral squamous cell carcinomas. Int J Oncol 34: 1565-1571, 2009
APA
Shigeishi, H., Fujimoto, S., Hiraoka, M., Ono, S., Taki, M., Ohta, K. ... Kamata, N. (2009). Overexpression of the receptor for hyaluronan-mediated motility, correlates with expression of microtubule-associated protein in human oral squamous cell carcinomas. International Journal of Oncology, 34, 1565-1571. https://doi.org/10.3892/ijo_00000286
MLA
Shigeishi, H., Fujimoto, S., Hiraoka, M., Ono, S., Taki, M., Ohta, K., Higashikawa, K., Kamata, N."Overexpression of the receptor for hyaluronan-mediated motility, correlates with expression of microtubule-associated protein in human oral squamous cell carcinomas". International Journal of Oncology 34.6 (2009): 1565-1571.
Chicago
Shigeishi, H., Fujimoto, S., Hiraoka, M., Ono, S., Taki, M., Ohta, K., Higashikawa, K., Kamata, N."Overexpression of the receptor for hyaluronan-mediated motility, correlates with expression of microtubule-associated protein in human oral squamous cell carcinomas". International Journal of Oncology 34, no. 6 (2009): 1565-1571. https://doi.org/10.3892/ijo_00000286