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Article

Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells

  • Authors:
    • Xiaoming Zhai
    • Yang Yang
    • Jianmei Wan
    • Ran Zhu
    • Yiwei Wu
  • View Affiliations / Copyright

    Affiliations: Department of Radiation Oncology, The First Affiliated Hospital, Soochow University, Suzhou, P.R. China, Department of Radiation Therapy, Zhejiang Cancer Hospital, Hangzhou, Zhejiang, P.R. China, School of Radiation Medicine and Protection, Medical College, Soochow University, Suzhou, Jiangsu 215006, P.R. China, Department of Nuclear Medicine, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu 215006, P.R. China
  • Pages: 2983-2991
    |
    Published online on: September 19, 2013
       https://doi.org/10.3892/or.2013.2735
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Abstract

An elevated rate of glucose consumption and the dependency on aerobic glycolysis for ATP generation have long been observed in cancer cells, a phenomenon known as the Warburg effect. the altered energy metabolism in cancer cells provides an attractive opportunity for developing novel cancer therapeutic strategies. Lactate dehydrogenase (LDH), which catalyzes the transformation of pyruvate to lactate, plays a vital role in the process of glycolysis. It has been reported that the level of LDH-A expression is increased both in head and neck cancer cells and in the blood serum of nasopharyngeal carcinoma (NPC) patients, and is associated with poor prognosis. However, the effect of LDH-A inhibition on NPC cells remains unknown. Here, in the present study, we found that oxamate, a classical inhibitor of LDH-A, suppressed cell proliferation in a dose- and time-dependent manner both in CNE-1 and CNE-2 cells, two NPC cancer cell lines. LDH inhibition by oxamate induced G2/M cell cycle arrest via downregulation of the CDK1/cyclin B1 pathway and promoted apoptosis through enhancement of mitochondrial ROS generation. N-acetylcysteine, a specific scavenger of ROS, significantly blocked the growth inhibition effect induced by oxamate. We also identified that oxamate increased sensitivity to ionizing radiation in the two NPC cancer cell lines. Furthermore, we verified similar results in tumor xenograft models. collectively, these results suggest that LDH-A may serve as a promising therapeutic target for NPC treatment.
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Copy and paste a formatted citation
Spandidos Publications style
Zhai X, Yang Y, Wan J, Zhu R and Wu Y: Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells. Oncol Rep 30: 2983-2991, 2013.
APA
Zhai, X., Yang, Y., Wan, J., Zhu, R., & Wu, Y. (2013). Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells. Oncology Reports, 30, 2983-2991. https://doi.org/10.3892/or.2013.2735
MLA
Zhai, X., Yang, Y., Wan, J., Zhu, R., Wu, Y."Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells". Oncology Reports 30.6 (2013): 2983-2991.
Chicago
Zhai, X., Yang, Y., Wan, J., Zhu, R., Wu, Y."Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells". Oncology Reports 30, no. 6 (2013): 2983-2991. https://doi.org/10.3892/or.2013.2735
Copy and paste a formatted citation
x
Spandidos Publications style
Zhai X, Yang Y, Wan J, Zhu R and Wu Y: Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells. Oncol Rep 30: 2983-2991, 2013.
APA
Zhai, X., Yang, Y., Wan, J., Zhu, R., & Wu, Y. (2013). Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells. Oncology Reports, 30, 2983-2991. https://doi.org/10.3892/or.2013.2735
MLA
Zhai, X., Yang, Y., Wan, J., Zhu, R., Wu, Y."Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells". Oncology Reports 30.6 (2013): 2983-2991.
Chicago
Zhai, X., Yang, Y., Wan, J., Zhu, R., Wu, Y."Inhibition of LDH-A by oxamate induces G2/M arrest, apoptosis and increases radiosensitivity in nasopharyngeal carcinoma cells". Oncology Reports 30, no. 6 (2013): 2983-2991. https://doi.org/10.3892/or.2013.2735
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