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Has‑miR‑125a and 125b are induced by treatment with cisplatin in nasopharyngeal carcinoma and inhibit apoptosis in a p53‑dependent manner by targeting p53 mRNA

  • Authors:
    • Jian Jun Chen
    • Shi Xi Liu
    • Mian Zhi Chen
    • Zi Yi Zhao

  • View Affiliations

  • Published online on: May 27, 2015     https://doi.org/10.3892/mmr.2015.3863
  • Pages: 3569-3574
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Abstract

MicroRNA (miRNA) is a class of non‑coding RNA, which targets mRNAs of interest and suppresses its expression by degradation or translational inhibition. miRNA (miR)‑125a and miR‑125b were previously demonstrated to translationally and transcriptionally inhibit the expression of p53. The observed downregulation of the protein level of p53 in cisplatin‑treated patients with nasopharyngeal carcinoma (NPC) indicates the association between cisplatin resistance, miR‑125a and miR‑125b. In the present study, through the detection of the expression levels of miR‑125a and miR‑125b, a significant upregulation of these miRs was demonstrated in cisplatin‑treated patients with NPC. As a consequence, the protein expression level of p53 decreased notably. To confirm the induction of miR‑125a and miR‑125b by treatment with cisplatin, a cisplatin‑resistant TW03 cell model (TW03/DDP) was constructed. As expected, in the TW03/DDP cells, the expression levels of miR‑125a and miR‑125b were upregulated, and this caused downregulation of p53. Ectopic expression of these miRNAs in the TW03 cell model sensitized TW03 to cisplatin by decreasing the protein expression levels of p53, whereas ectopic expression in the antisense oligos of these microRNAs demonstrated the opposite effect. In addition, the present demonstrated that the cisplatin‑induced expression of miR‑125a and miR‑125b inhibited cisplatin‑induced apoptosis in the TW03 cells by decreasing the protein expression levels of p53. Taken together, the present study revealed for the first time, to the best of our knowledge, that induction of the expression of miR‑125a and miR‑125b by treatment with cisplatin resulted in resistance to the cisplatin drug in the NPC cells.
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September-2015
Volume 12 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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  • Journal Metrics
  • Impact Factor: 3.4
  • Ranked Medicine Research and Experimental
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  • CiteScore: 6.9
  • CiteScore Rank: Q2: #98/328 Biochemistry, Genetics and Molecular Biology
  • Source Normalized Impact per Paper (SNIP): 0.721
  • SCImago Journal Rank (SJR): 0.65
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Spandidos Publications style
Chen JJ, Liu SX, Chen MZ and Zhao ZY: Has‑miR‑125a and 125b are induced by treatment with cisplatin in nasopharyngeal carcinoma and inhibit apoptosis in a p53‑dependent manner by targeting p53 mRNA. Mol Med Rep 12: 3569-3574, 2015
APA
Chen, J.J., Liu, S.X., Chen, M.Z., & Zhao, Z.Y. (2015). Has‑miR‑125a and 125b are induced by treatment with cisplatin in nasopharyngeal carcinoma and inhibit apoptosis in a p53‑dependent manner by targeting p53 mRNA. Molecular Medicine Reports, 12, 3569-3574. https://doi.org/10.3892/mmr.2015.3863
MLA
Chen, J. J., Liu, S. X., Chen, M. Z., Zhao, Z. Y."Has‑miR‑125a and 125b are induced by treatment with cisplatin in nasopharyngeal carcinoma and inhibit apoptosis in a p53‑dependent manner by targeting p53 mRNA". Molecular Medicine Reports 12.3 (2015): 3569-3574.
Chicago
Chen, J. J., Liu, S. X., Chen, M. Z., Zhao, Z. Y."Has‑miR‑125a and 125b are induced by treatment with cisplatin in nasopharyngeal carcinoma and inhibit apoptosis in a p53‑dependent manner by targeting p53 mRNA". Molecular Medicine Reports 12, no. 3 (2015): 3569-3574. https://doi.org/10.3892/mmr.2015.3863