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Article

Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer

  • Authors:
    • Xiao-Hong Bao
    • Munenori Takaoka
    • Hui-Fang Hao
    • Takuya Fukazawa
    • Tomoki Yamatsuji
    • Kazufumi Sakurama
    • Nagio Takigawa
    • Motowo Nakajima
    • Toshiyoshi Fujiwara
    • Yoshio Naomoto
  • View Affiliations / Copyright

    Affiliations: Department of Gastroenterological Surgery, Transplant and Surgical Oncology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan, Department of General Surgery, Kawasaki Medical School, Okayama, Japan, Department of General Internal Medicine 4, Kawasaki Medical School, Okayama, Japan, SBI ALApromo, Co., Ltd, Tokyo, Japan
  • Pages: 45-50
    |
    Published online on: October 9, 2012
       https://doi.org/10.3892/or.2012.2074
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Abstract

Heat shock protein 90 (HSP90), a molecular chaperone, has provoked great interest as a promising molecular target for cancer treatment, due to its involvement in regulating the conformation, stability and functions of key oncogenic proteins. At present, a variety of chemical compounds targeting HSP90 have been developed and have shown convincing anti-neoplastic activity in various preclinical tumor models. The aim of our study was to evaluate the antitumor effects of a novel HSP90 inhibitor, NVP-AUY922, in esophageal squamous cancer cells (ESCC). Four ESCC cell lines (TE-1, TE-4, TE-8, TE-10) were examined. NVP-AUY922 potently inhibited the proliferation of ESCC, particularly in PTEN-null TE-4 cells with a 2-3 times lower IC50 than the other three cell lines. Western blot analysis showed that PTEN-null TE-4 cells exhibited higher AKT and ERK activity, which contribute to cell proliferation and survival. NVP-AUY922 significantly suppressed the activity of AKT and ERK in TE-4 but not in PTEN-proficient TE-10 cells. Genetic modification experiments demonstrated that the sensitivity to NVP-AUY922 was decreased by exogenous transduction of PTEN in TE-4 and increased by silencing PTEN expression in intact PTEN-expressing TE-10, suggesting that the expression of PTEN may be associated with cell sensitivity in HSP90 inhibition. Furthermore, the enhanced activity of AKT in PTEN-silenced TE-10 was more easily suppressed by NVP-AUY922. Collectively, NVP-AUY922 exhibits a strong antiproliferative effect, revealing its potential as a novel therapeutic alternative to current ESCC treatment. The effect may be improved further by impeding PTEN expression.
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Copy and paste a formatted citation
Spandidos Publications style
Bao X, Takaoka M, Hao H, Fukazawa T, Yamatsuji T, Sakurama K, Takigawa N, Nakajima M, Fujiwara T, Naomoto Y, Naomoto Y, et al: Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer. Oncol Rep 29: 45-50, 2013.
APA
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K. ... Naomoto, Y. (2013). Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer. Oncology Reports, 29, 45-50. https://doi.org/10.3892/or.2012.2074
MLA
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K., Takigawa, N., Nakajima, M., Fujiwara, T., Naomoto, Y."Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer". Oncology Reports 29.1 (2013): 45-50.
Chicago
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K., Takigawa, N., Nakajima, M., Fujiwara, T., Naomoto, Y."Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer". Oncology Reports 29, no. 1 (2013): 45-50. https://doi.org/10.3892/or.2012.2074
Copy and paste a formatted citation
x
Spandidos Publications style
Bao X, Takaoka M, Hao H, Fukazawa T, Yamatsuji T, Sakurama K, Takigawa N, Nakajima M, Fujiwara T, Naomoto Y, Naomoto Y, et al: Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer. Oncol Rep 29: 45-50, 2013.
APA
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K. ... Naomoto, Y. (2013). Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer. Oncology Reports, 29, 45-50. https://doi.org/10.3892/or.2012.2074
MLA
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K., Takigawa, N., Nakajima, M., Fujiwara, T., Naomoto, Y."Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer". Oncology Reports 29.1 (2013): 45-50.
Chicago
Bao, X., Takaoka, M., Hao, H., Fukazawa, T., Yamatsuji, T., Sakurama, K., Takigawa, N., Nakajima, M., Fujiwara, T., Naomoto, Y."Antiproliferative effect of the HSP90 inhibitor NVP-AUY922 is determined by the expression of PTEN in esophageal cancer". Oncology Reports 29, no. 1 (2013): 45-50. https://doi.org/10.3892/or.2012.2074
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