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

JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression

  • Authors:
    • Masashi Okada
    • Atsushi Sato
    • Keita Shibuya
    • Eriko Watanabe
    • Shizuka Seino
    • Shuhei Suzuki
    • Manabu Seino
    • Yoshitaka Narita
    • Soichiro Shibui
    • Takamasa Kayama
    • Chifumi Kitanaka
  • View Affiliations / Copyright

    Affiliations: Department of Molecular Cancer Science, Yamagata University School of Medicine, Yamagata 990-9585, Japan, Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan, Department of Neurosurgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
  • Pages: 591-599
    |
    Published online on: December 5, 2013
       https://doi.org/10.3892/ijo.2013.2209
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Abstract

While elimination of the cancer stem cell population is increasingly recognized as a key to successful treatment of cancer, the high resistance of cancer stem cells to conventional chemoradiotherapy remains a therapeutic challenge. O6-methylguanine DNA methyltransferase (MGMT), which is frequently expressed in cancer stem cells of glioblastoma, has been implicated in their resistance to temozolomide, the first-line chemotherapeutic agent against newly diagnosed glioblastoma. However, much remains unknown about the molecular regulation that underlies MGMT expression and temozolomide resistance of glioblastoma cancer stem cells. Here, we identified JNK as a novel player in the control of MGMT expression and temozolomide resistance of glioblastoma cancer stem cells. We showed that inhibition of JNK, either pharmacologically or by RNA interference, in stem-like glioblastoma cells derived directly from glioblastoma tissues reduces their MGMT expression and temozolomide resistance. Importantly, sensitization of stem-like glioblastoma cells to temozolomide by JNK inhibition was dependent on MGMT expression, implying that JNK controls temozolomide resistance of stem-like glioblastoma cells through MGMT expression. Our findings suggest that concurrent use of JNK inhibitors with temozolomide may be a rational therapeutic approach to effectively target the cancer stem cell population in the treatment of glioblastoma.
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Copy and paste a formatted citation
Spandidos Publications style
Okada M, Sato A, Shibuya K, Watanabe E, Seino S, Suzuki S, Seino M, Narita Y, Shibui S, Kayama T, Kayama T, et al: JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression. Int J Oncol 44: 591-599, 2014.
APA
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S. ... Kitanaka, C. (2014). JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression. International Journal of Oncology, 44, 591-599. https://doi.org/10.3892/ijo.2013.2209
MLA
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S., Seino, M., Narita, Y., Shibui, S., Kayama, T., Kitanaka, C."JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression". International Journal of Oncology 44.2 (2014): 591-599.
Chicago
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S., Seino, M., Narita, Y., Shibui, S., Kayama, T., Kitanaka, C."JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression". International Journal of Oncology 44, no. 2 (2014): 591-599. https://doi.org/10.3892/ijo.2013.2209
Copy and paste a formatted citation
x
Spandidos Publications style
Okada M, Sato A, Shibuya K, Watanabe E, Seino S, Suzuki S, Seino M, Narita Y, Shibui S, Kayama T, Kayama T, et al: JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression. Int J Oncol 44: 591-599, 2014.
APA
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S. ... Kitanaka, C. (2014). JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression. International Journal of Oncology, 44, 591-599. https://doi.org/10.3892/ijo.2013.2209
MLA
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S., Seino, M., Narita, Y., Shibui, S., Kayama, T., Kitanaka, C."JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression". International Journal of Oncology 44.2 (2014): 591-599.
Chicago
Okada, M., Sato, A., Shibuya, K., Watanabe, E., Seino, S., Suzuki, S., Seino, M., Narita, Y., Shibui, S., Kayama, T., Kitanaka, C."JNK contributes to temozolomide resistance of stem-like glioblastoma cells via regulation of MGMT expression". International Journal of Oncology 44, no. 2 (2014): 591-599. https://doi.org/10.3892/ijo.2013.2209
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