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Article

Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells

  • Authors:
    • Dae Woo Lee
    • Weonsun Lee
    • Miyeon Kwon
    • Hae Nam Lee
  • View Affiliations / Copyright

    Affiliations: Department of Obstetrics and Gynecology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 14647, Republic of Korea, Clinical Medicine Research Institute, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 14647, Republic of Korea
  • Pages: 390-400
    |
    Published online on: November 11, 2020
       https://doi.org/10.3892/or.2020.7845
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Abstract

The present study aimed to analyze the compensatory signaling pathways induced by forkhead domain inhibitor‑6 (FDI‑6), which is a forkhead box protein M1 (FOXM1) inhibitor, in ovarian cancer cells and evaluate the effectiveness of simultaneous inhibition of FOXM1 and the compensatory signaling pathway in decreasing the survival of ovarian cancer cells. The present study identified the proteins involved in the compensatory mechanism activated by FDI‑6 in HeyA8 ovarian cancer cells using western blot analysis and a reverse‑phase protein array. In addition, a cell viability assay was performed to determine the effects of FDI‑6 and the compensatory signaling pathway on cancer cell viability. All experiments were performed in three‑dimensional cell cultures. The present study observed that FDI‑6 stimulated the upregulation of N‑Ras, phosphoprotein kinase Cδ (p‑PKCδ) (S664) and HER3 in HeyA8 cells. Tipifarnib as an N‑Ras inhibitor, rottlerin as a p‑PKCδ (S664) inhibitor and sapitinib as a HER3 inhibitor were selected. The combination of FDI‑6 with tipifarnib attenuated the upregulation of N‑Ras induced by FDI‑6 and the combination of FDI‑6 with sapitinib also attenuated HER3 downstream signaling pathway in HeyA8 cells, as shown by on western blot analysis. Rottlerin downregulated p‑PKCδ (S664) by inhibiting the activity of a Src‑related tyrosine kinase that transfers a phosphate group to PKCδ. Compared with FDI‑6 alone, the addition of tipifarnib or rottlerin to FDI‑6 was significantly more effective in reducing the growth of HeyA8 cells. However, the combination of FDI‑6 and sapitinib did not induce a significant decrease in survival of HeyA8 cells. In conclusion, the addition of tipifarnib or rottlerin to inhibit N‑Ras or p‑PKCδ (S664), respectively, inhibited the compensatory signaling pathway response induced by FDI‑6 in HeyA8 cells. These inhibitors increased the efficacy of FDI‑6, which inhibits FOXM1, in reducing ovarian cancer cell viability.
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Copy and paste a formatted citation
Spandidos Publications style
Lee DW, Lee W, Kwon M and Lee HN: Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells. Oncol Rep 45: 390-400, 2021.
APA
Lee, D.W., Lee, W., Kwon, M., & Lee, H.N. (2021). Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells. Oncology Reports, 45, 390-400. https://doi.org/10.3892/or.2020.7845
MLA
Lee, D. W., Lee, W., Kwon, M., Lee, H. N."Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells". Oncology Reports 45.1 (2021): 390-400.
Chicago
Lee, D. W., Lee, W., Kwon, M., Lee, H. N."Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells". Oncology Reports 45, no. 1 (2021): 390-400. https://doi.org/10.3892/or.2020.7845
Copy and paste a formatted citation
x
Spandidos Publications style
Lee DW, Lee W, Kwon M and Lee HN: Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells. Oncol Rep 45: 390-400, 2021.
APA
Lee, D.W., Lee, W., Kwon, M., & Lee, H.N. (2021). Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells. Oncology Reports, 45, 390-400. https://doi.org/10.3892/or.2020.7845
MLA
Lee, D. W., Lee, W., Kwon, M., Lee, H. N."Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells". Oncology Reports 45.1 (2021): 390-400.
Chicago
Lee, D. W., Lee, W., Kwon, M., Lee, H. N."Dual inhibition of FOXM1 and its compensatory signaling pathway decreased the survival of ovarian cancer cells". Oncology Reports 45, no. 1 (2021): 390-400. https://doi.org/10.3892/or.2020.7845
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