Reversion of trichostatin A resistance via inhibition of the Wnt signaling pathway in human pancreatic cancer cells

  • Authors:
    • Benquan Wang
    • Qian Zou
    • Meng Sun
    • Jingfeng Chen
    • Tianyang Wang
    • Yongheng Bai
    • Zongjing Chen
    • Bicheng Chen
    • Mengtao Zhou
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  • Published online on: September 10, 2014     https://doi.org/10.3892/or.2014.3476
  • Pages: 2015-2022
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Abstract

Drug resistance is a major impediment to successful chemotherapy in pancreatic cancer (PC) patients. We investigated the effect of Wnt/β-catenin signaling inhibition by wnt-c59 on chemoresistance in a trichostatin A-resistant Panc-1 cell line (Panc-1/TSA). Panc-1/TSA cells were treated with the Wnt/β‑catenin signaling inhibitor wnt-c59 (10 µmol · l-1) and/or trichostatin A (TSA; 10 µmol · l-1) for 24 h. CCK-8 assay was utilized to analyze the interactive effect of TSA and wnt-c59 on induction of apoptosis of the Panc-1/TSA cells. Cell apoptosis was measured by flow cytometry. Real-time PCR and western blotting were used to assess Wnt/β-catenin signaling, epithelial-mesenchymal transition (EMT) and multidrug resistance (MDR). Real-time cell analysis (RTCA) was used to detect the cell migration ability. After wnt-c59 treatment for 24 h, relative genes and transcriptional targets of Wnt/β-catenin signaling were downregulated (P<0.05). CCK-8 assay indicated that the combination of TSA and wnt-c59 had a synergistic effect on induction of Panc-1/TSA cell apoptosis. As detected by FACS, cell apoptosis rates increased significantly (P<0.05). The results of RTCA showed that the cell indices of the control group, wnt-c59 group, TSA group and TSA+wnt-c59 combination group were 1.2842±0.0257, 1.2155±0.0282, 1.2533±0.0194 and 0.8541±0.0250, respectively. In accordance, MMP-9 protein in the wnt-c59 treatment groups was decreased compared to the non-wnt-c59 treatment groups. Meanwhile, E-cadherin protein was upregulated and vimentin protein was downregulated, both of which are characteristic markers of EMT. Chemoresistant gene MDR1 and P-glycoprotein (P-gp) in the wnt-c59 treatment groups had a reduced expression compared to the non-wnt-c59 treatment groups. This study revealed that TSA sensitivity, migration ability, and the EMT phenotype in Panc-1/TSA cells were reversed following Wnt/β-catenin signaling inhibition.
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November-2014
Volume 32 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Wang B, Zou Q, Sun M, Chen J, Wang T, Bai Y, Chen Z, Chen B and Zhou M: Reversion of trichostatin A resistance via inhibition of the Wnt signaling pathway in human pancreatic cancer cells. Oncol Rep 32: 2015-2022, 2014.
APA
Wang, B., Zou, Q., Sun, M., Chen, J., Wang, T., Bai, Y. ... Zhou, M. (2014). Reversion of trichostatin A resistance via inhibition of the Wnt signaling pathway in human pancreatic cancer cells. Oncology Reports, 32, 2015-2022. https://doi.org/10.3892/or.2014.3476
MLA
Wang, B., Zou, Q., Sun, M., Chen, J., Wang, T., Bai, Y., Chen, Z., Chen, B., Zhou, M."Reversion of trichostatin A resistance via inhibition of the Wnt signaling pathway in human pancreatic cancer cells". Oncology Reports 32.5 (2014): 2015-2022.
Chicago
Wang, B., Zou, Q., Sun, M., Chen, J., Wang, T., Bai, Y., Chen, Z., Chen, B., Zhou, M."Reversion of trichostatin A resistance via inhibition of the Wnt signaling pathway in human pancreatic cancer cells". Oncology Reports 32, no. 5 (2014): 2015-2022. https://doi.org/10.3892/or.2014.3476