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Article Open Access

miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression

  • Authors:
    • Xiaoke Hou
    • Zhaofeng Niu
    • Leilei Liu
    • Qiang Guo
    • Haiyang Li
    • Xiaojun Yang
    • Xia Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Breast Surgery, Yuncheng Central Hospital, Yuncheng, Shanxi 044000, P.R. China, The First Department of Oncology, Linfen Central Hospital, Linfen, Shanxi 041000, P.R. China, Department of Oncology, Linfen People's Hospital, Linfen, Shanxi 041000, P.R. China
    Copyright: © Hou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 990-998
    |
    Published online on: November 12, 2018
       https://doi.org/10.3892/ol.2018.9687
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Abstract

Taxol‑based chemotherapy is a conventional therapeutic approach for the treatment of triple‑negative breast cancer (TNBC). However, the insensitivity of TNBC cells to Taxol greatly limits the anticancer effect of the drug and leads to patient mortality. The present study first evaluated the expression levels of microRNA (miR)‑1207‑5p in human normal breast epithelial MCF‑10A cells and TNBC cell lines (MDA‑MB‑231, MDA‑MB‑436 and MDA‑MB‑453). The results revealed that the highest miR‑1207‑5p level was in MDA‑MB‑231, which suggested an oncogenic role of miR‑1207‑5p in TNBC. Therefore, MDA‑MB‑231 served as the present study's research model in subsequent experiments. The mRNAs that functioned as tumor suppressor factors for miR‑1207‑5p were then determined. Leucine zipper tumor suppressor gene 1 (LZTS1), which was predicted by TargetScan 6.2 and was supported by the results of a dual luciferase assay, was identified as a target of miR‑1207‑5p. AntagomiR‑1207‑5p increased LZTS1 mRNA and protein expressions, enhanced cell growth arrest and cell apoptosis induced by Taxol in MDA‑MB‑231 cells. Additionally, it was observed that, when compared with Taxol treatment, the combination of Taxol and antagomiR‑1207‑5p induced a sharp decrease in B‑cell lymphoma 2 (Bcl‑2) and phosphorylated‑protein kinase B expression accompanied by an increase in the Bcl‑2‑associated X protein expression. Finally, miR‑1207‑5p expression was significantly increased, while LZTS1 expression was significantly decreased, in TNBC tissues when compared with normal adjacent tissues, and there was a negative correlation between miR‑1207‑5p and LZTS1 expression. In addition, there was a notable elevation in the expression of miR‑1207‑5p and a reduction in the expression of LZTS1 in the Taxol non‑responsive TNBC tissues when compared with the Taxol‑responsive TNBC tissues. The results of the present study suggested that miR‑1207‑5p may be a promising predictor of sensitivity towards Taxol in TNBC.
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Copy and paste a formatted citation
Spandidos Publications style
Hou X, Niu Z, Liu L, Guo Q, Li H, Yang X and Zhang X: miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression. Oncol Lett 17: 990-998, 2019.
APA
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., & Zhang, X. (2019). miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression. Oncology Letters, 17, 990-998. https://doi.org/10.3892/ol.2018.9687
MLA
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., Zhang, X."miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression". Oncology Letters 17.1 (2019): 990-998.
Chicago
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., Zhang, X."miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression". Oncology Letters 17, no. 1 (2019): 990-998. https://doi.org/10.3892/ol.2018.9687
Copy and paste a formatted citation
x
Spandidos Publications style
Hou X, Niu Z, Liu L, Guo Q, Li H, Yang X and Zhang X: miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression. Oncol Lett 17: 990-998, 2019.
APA
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., & Zhang, X. (2019). miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression. Oncology Letters, 17, 990-998. https://doi.org/10.3892/ol.2018.9687
MLA
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., Zhang, X."miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression". Oncology Letters 17.1 (2019): 990-998.
Chicago
Hou, X., Niu, Z., Liu, L., Guo, Q., Li, H., Yang, X., Zhang, X."miR‑1207‑5p regulates the sensitivity of triple‑negative breast cancer cells to Taxol treatment via the suppression of LZTS1 expression". Oncology Letters 17, no. 1 (2019): 990-998. https://doi.org/10.3892/ol.2018.9687
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