Open Access

Association between Twist and multidrug resistance gene‑associated proteins in Taxol®‑resistant MCF‑7 cells and a 293 cell model of Twist overexpression

  • Authors:
    • Li Wang
    • Rui‑Zhi Tan
    • Zhi‑Xia Zhang
    • Rui Yin
    • Yong‑Liang Zhang
    • Wei‑Jia Cui
    • Tao He
  • View Affiliations

  • Published online on: November 17, 2017     https://doi.org/10.3892/ol.2017.7438
  • Pages:1058-1066
  • Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Multidrug resistance (MDR) severely limits the effectiveness of chemotherapy. Previous studies have identified Twist as a key factor of acquired MDR in breast, gastric and prostate cancer. However, the underlying mechanisms of action of Twist in MDR remain unclear. In the present study, the expression levels of MDR‑associated proteins, including lung resistance‑related protein (LRP), topoisomerase IIα (TOPO IIα), MDR‑associated protein (MRP) and P‑glycoprotein (P‑gp), and the expression of Twist in cancerous tissues and pericancerous tissues of human breast cancer, were examined. In order to simulate Taxol® resistance in cells, a Taxol®‑resistant human mammary adenocarcinoma cell subline (MCF‑7/Taxol®) was established by repeatedly exposing MCF‑7 cells to high concentrations of Taxol® (up to 15 µg/ml). Twist was also overexpressed in 293 cells by transfecting this cell line with pcDNA5/FRT/TO vector containing full‑length hTwist cDNA to explore the dynamic association between Twist and MDR gene‑associated proteins. It was identified that the expression levels of Twist, TOPO IIα, MRP and P‑gp were upregulated and LRP was downregulated in human breast cancer tissues, which was consistent with the expression of these proteins in the Taxol®‑resistant MCF‑7 cell model. Notably, the overexpression of Twist in 293 cells increased the resistance to Taxol®, Trichostatin A and 5‑fluorouracil, and also upregulated the expression of MRP and P‑gp. Taken together, these data demonstrated that Twist may promote drug resistance in cells and cancer tissues through regulating the expression of MDR gene‑associated proteins, which may assist in understanding the mechanisms of action of Twist in drug resistance.

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January 2018
Volume 15 Issue 1

Print ISSN: 1792-1074
Online ISSN:1792-1082

2016 Impact Factor: 1.39
Ranked #68/217 Oncology
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APA
Wang, L., Tan, R., Zhang, Z., Yin, R., Zhang, Y., Cui, W., & He, T. (2018). Association between Twist and multidrug resistance gene‑associated proteins in Taxol®‑resistant MCF‑7 cells and a 293 cell model of Twist overexpression. Oncology Letters, 15, 1058-1066. https://doi.org/10.3892/ol.2017.7438
MLA
Wang, L., Tan, R., Zhang, Z., Yin, R., Zhang, Y., Cui, W., He, T."Association between Twist and multidrug resistance gene‑associated proteins in Taxol®‑resistant MCF‑7 cells and a 293 cell model of Twist overexpression". Oncology Letters 15.1 (2018): 1058-1066.
Chicago
Wang, L., Tan, R., Zhang, Z., Yin, R., Zhang, Y., Cui, W., He, T."Association between Twist and multidrug resistance gene‑associated proteins in Taxol®‑resistant MCF‑7 cells and a 293 cell model of Twist overexpression". Oncology Letters 15, no. 1 (2018): 1058-1066. https://doi.org/10.3892/ol.2017.7438