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Article

In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma

  • Authors:
    • Ye‑Xing Xu
    • Man‑Li Zeng
    • Di Yu
    • Jie Ren
    • Fen Li
    • Anyuan Zheng
    • Yong‑Ping Wang
    • Chen Chen
    • Ze‑Zhang Tao
  • View Affiliations / Copyright

    Affiliations: Department of Otolaryngology Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China, Department of Otolaryngology-Head and Neck Surgery, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
  • Pages: 7999-8004
    |
    Published online on: March 15, 2018
       https://doi.org/10.3892/ol.2018.8279
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Abstract

The present study aimed to investigate the antitumor efficacy of di‑2‑pyridylketone‑4‑cyclohexyl‑4‑methyl‑3‑­thiosemicarbazone (DpC) and di‑2‑­pyridylketone‑4,4,‑­dimethyl‑3‑thiosemicarbazone (Dp44mT) on head and neck squamous cell carcinoma (HNSCC) cells. The proliferation and apoptosis of HNSCC cells treated with the iron chelators DpC and Dp44mT were detected. The mechanism of DpC‑induced apoptosis on HNSCC cells was investigated. The human HNSCC cell lines FaDu, Cal‑27 and SCC‑9 were cultured in vitro and exposed to gradient concentrations of DpC and Dp44mT. A Cell Counting Kit‑8 assay was used to detect the viability of FaDu, Cal‑27, SCC‑9 cells. Double staining with annexin V and propidium iodide was performed for the detection of the proportion of apoptotic FaDu, Cal‑27 and SCC‑9 cells following treatment. The nuclear damage to Cal‑27 cells that were treated with DpC was detected by Hoechst staining. Finally, western blot analysis was used to detect the expression of proteins associated with the DNA damage pathway in Cal‑27 cells that were treated with DpC. The CCK‑8 assay showed that treatment with DpC and Dp44mT was able to markedly inhibit the viability of FaDu, Cal‑27 and SCC‑9 cells in a concentration‑dependent manner. In comparison to Dp44mT, treatment with DpC exhibited a more effective inhibitory effect on the viability of HNSCC cells. The proportion of apoptotic cells detected by flow cytometry increased in a dose‑dependent manner in all cell lines following DpC and Dp44mT treatment, with the proportion of apoptotic HNSCC cells induced by DpC treatment being significantly higher compared with Dp44mT (P<0.05). The results of Hoechst staining revealed that the nuclei of Cal‑27 cells exhibited morphological changes in response to DpC treatment, including karyopyknosis and nuclear fragmentation. The expression of DNA damage‑associated proteins, including phosphorylated (p)‑serine‑protein kinase ATM, p‑serine/threonine‑protein kinase Chk1 (p‑Chk‑1), p‑serine/threonine‑protein kinase ATR (p‑ATR), p‑Chk‑2, poly (ADP‑ribose) polymerase, p‑histone H2AX, breast cancer type 1 susceptibility protein, p‑tumor protein P53, increased with increasing concentration of DpC in Cal‑27 cells. Treatment with DpC and Dp44mT markedly inhibited cell viability and increased the apoptotic rates in human HNSCC cells in a concentration‑dependent manner. DpC exhibited a stronger antitumor effect compared with Dp44mT, potentially inducing the apoptosis of HNSCC cells via the upregulation of DNA damage repair‑associated proteins.
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Copy and paste a formatted citation
Spandidos Publications style
Xu YX, Zeng ML, Yu D, Ren J, Li F, Zheng A, Wang YP, Chen C and Tao ZZ: In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma. Oncol Lett 15: 7999-8004, 2018.
APA
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A. ... Tao, Z. (2018). In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma. Oncology Letters, 15, 7999-8004. https://doi.org/10.3892/ol.2018.8279
MLA
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A., Wang, Y., Chen, C., Tao, Z."In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma". Oncology Letters 15.5 (2018): 7999-8004.
Chicago
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A., Wang, Y., Chen, C., Tao, Z."In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma". Oncology Letters 15, no. 5 (2018): 7999-8004. https://doi.org/10.3892/ol.2018.8279
Copy and paste a formatted citation
x
Spandidos Publications style
Xu YX, Zeng ML, Yu D, Ren J, Li F, Zheng A, Wang YP, Chen C and Tao ZZ: In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma. Oncol Lett 15: 7999-8004, 2018.
APA
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A. ... Tao, Z. (2018). In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma. Oncology Letters, 15, 7999-8004. https://doi.org/10.3892/ol.2018.8279
MLA
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A., Wang, Y., Chen, C., Tao, Z."In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma". Oncology Letters 15.5 (2018): 7999-8004.
Chicago
Xu, Y., Zeng, M., Yu, D., Ren, J., Li, F., Zheng, A., Wang, Y., Chen, C., Tao, Z."In vitro assessment of the role of DpC in the treatment of head and neck squamous cell carcinoma". Oncology Letters 15, no. 5 (2018): 7999-8004. https://doi.org/10.3892/ol.2018.8279
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