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Article

Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells

  • Authors:
    • Yan Zhao
    • Qiaoyan Li
    • Xiaoying Wu
    • Puxiang Chen
  • View Affiliations / Copyright

    Affiliations: Department of Gynecology and Obstetrics, The Maternal and Child Health Hospital of Hunan, Changsha, Hunan 410008, P.R. China, Department of Gynecology and Obstetrics, Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P.R. China, Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China, Department of Gynecology and Obstetrics, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
  • Pages: 1659-1666
    |
    Published online on: June 14, 2016
       https://doi.org/10.3892/mmr.2016.5399
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Abstract

Ovarian cancer has a poor prognosis due to its chemoresistance, and p27Kip1 (p27) has been implicated in tumor prognosis and drug-resistance. However, the regulatory mechanisms of p27 in drug‑resistance in ovarian cancer remain unknown. The current study successfully established chemoresistant cell lines using paclitaxel (TAX), cisplatin (DDP) and carboplatin (CBP) in SKOV3 ovarian cancer cells. The results indicated that the expression levels of p27 were dramatically downregulated in chemoresistant cells. However, 5-aza-2'-deoxycytidine (5-aza) treatment restored p27 expression in DDP-resistant cells, and increased their sensitivity to DDP. In addition, it was observed that the methylation of DDP‑resistant cells, which was downregulated by 5‑aza treatment, was significantly higher compared with SKOV3 cells. Additionally, the overexpression of p27 arrested the cell cycle in S phase and promoted an apoptotic response to DDP. In conclusion, p27 was involved in chemoresistance of SKOV3 cells. Upregulated p27 expression induced by demethylation may enhance sensitivity to DDP through the regulation of the cell cycle.
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Copy and paste a formatted citation
Spandidos Publications style
Zhao Y, Li Q, Wu X and Chen P: Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells. Mol Med Rep 14: 1659-1666, 2016.
APA
Zhao, Y., Li, Q., Wu, X., & Chen, P. (2016). Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells. Molecular Medicine Reports, 14, 1659-1666. https://doi.org/10.3892/mmr.2016.5399
MLA
Zhao, Y., Li, Q., Wu, X., Chen, P."Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells". Molecular Medicine Reports 14.2 (2016): 1659-1666.
Chicago
Zhao, Y., Li, Q., Wu, X., Chen, P."Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells". Molecular Medicine Reports 14, no. 2 (2016): 1659-1666. https://doi.org/10.3892/mmr.2016.5399
Copy and paste a formatted citation
x
Spandidos Publications style
Zhao Y, Li Q, Wu X and Chen P: Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells. Mol Med Rep 14: 1659-1666, 2016.
APA
Zhao, Y., Li, Q., Wu, X., & Chen, P. (2016). Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells. Molecular Medicine Reports, 14, 1659-1666. https://doi.org/10.3892/mmr.2016.5399
MLA
Zhao, Y., Li, Q., Wu, X., Chen, P."Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells". Molecular Medicine Reports 14.2 (2016): 1659-1666.
Chicago
Zhao, Y., Li, Q., Wu, X., Chen, P."Upregulation of p27Kip1 by demethylation sensitizes cisplatin-resistant human ovarian cancer SKOV3 cells". Molecular Medicine Reports 14, no. 2 (2016): 1659-1666. https://doi.org/10.3892/mmr.2016.5399
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