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Article

Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells

  • Authors:
    • Jong Bin Kim
    • Sung Eun Hwang
    • Sang‑Pil Yoon
  • View Affiliations / Copyright

    Affiliations: Ewha Institute of Convergence Medicine, Ewha Womans University Mokdong Hospital, Ewha Womans University, Seoul 03080, Republic of Korea, Department of Surgery, College of Medicine, Graduate School, Chungnam National University, Daejeon 35015, Republic of Korea, Department of Anatomy, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
  • Pages: 453-458
    |
    Published online on: May 10, 2017
       https://doi.org/10.3892/mmr.2017.6566
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Abstract

Side population (SP) cells represent a rare population among breast cancer cells. SP cells have been reported to act as cancer stem‑like cells, and to participate in the development of multidrug resistance via modulating the expression of ATP-binding cassette subfamily G member 2 (ABCG2). Dexamethasone is a corticosteroid drug that has been used as an adjuvant treatment to enhance the efficacy of chemotherapeutic agents; however, its effects in breast cancer have yet to be thoroughly investigated. In the present study, the effects of dexamethasone were investigated using the human MCF‑7 breast cancer cell line, and SPs were examined in detail. Cellular proliferation, SP fractions and ABCG2 expression were examined following treatment of MCF‑7 cells with dexamethasone. Dexamethasone was revealed to cause a dose‑ and time‑dependent decrease in cancer cell proliferation, and it also decreased the size of the SP fraction of MCF‑7 cells and the expression of the ABCG2 transporter. The effects of dexamethasone on cellular proliferation, SP fraction and ABCG2 expression were abolished following the administration of the glucocorticoid antagonist RU486. These results suggested that dexamethasone may target breast cancer cell SPs and thus increase the sensitivity of tumor cells to chemotherapy. Therefore, it may be hypothesized that dexamethasone can be used as a chemosensitizer in the adjuvant treatment of patients with breast cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Kim JB, Hwang SE and Yoon SP: Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells. Mol Med Rep 16: 453-458, 2017.
APA
Kim, J.B., Hwang, S.E., & Yoon, S. (2017). Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells. Molecular Medicine Reports, 16, 453-458. https://doi.org/10.3892/mmr.2017.6566
MLA
Kim, J. B., Hwang, S. E., Yoon, S."Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells". Molecular Medicine Reports 16.1 (2017): 453-458.
Chicago
Kim, J. B., Hwang, S. E., Yoon, S."Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells". Molecular Medicine Reports 16, no. 1 (2017): 453-458. https://doi.org/10.3892/mmr.2017.6566
Copy and paste a formatted citation
x
Spandidos Publications style
Kim JB, Hwang SE and Yoon SP: Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells. Mol Med Rep 16: 453-458, 2017.
APA
Kim, J.B., Hwang, S.E., & Yoon, S. (2017). Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells. Molecular Medicine Reports, 16, 453-458. https://doi.org/10.3892/mmr.2017.6566
MLA
Kim, J. B., Hwang, S. E., Yoon, S."Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells". Molecular Medicine Reports 16.1 (2017): 453-458.
Chicago
Kim, J. B., Hwang, S. E., Yoon, S."Dexamethasone reduces side population fraction through downregulation of ABCG2 transporter in MCF-7 breast cancer cells". Molecular Medicine Reports 16, no. 1 (2017): 453-458. https://doi.org/10.3892/mmr.2017.6566
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