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Article

Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration

  • Authors:
    • Seong‑Joon Park
    • Joong‑Gook Kim
    • Nam Deuk Kim
    • Kwangmo Yang
    • Jae Woong Shim
    • Kyu Heo
  • View Affiliations / Copyright

    Affiliations: Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea, Department of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
  • Pages: 1895-1902
    |
    Published online on: January 15, 2016
       https://doi.org/10.3892/ol.2016.4115
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Abstract

Breast cancer is one of the most common cancer types among women, acting as a distinct cause of mortality, and has a high incidence of recurrence. External stimuli, including 17β‑estradiol (E2), transforming growth factor (TGF)‑β1 and hypoxia, may be important in breast cancer growth and metastasis. However, the effects of these stimuli on breast cancer stem cell (CSC) regulation have not been fully investigated. In the present study, the proportion of cluster of differentiation (CD)44+/CD24‑/low cells increased following treatment with E2, TGF‑β1 and hypoxia in MCF‑7 cells. The expression of CSC markers, including SOX2, KLF4 and ABCG2, was upregulated continually by E2, TGF‑β1 and hypoxia. In addition, the expression levels of epithelial‑mesenchymal transition‑associated factors increased following treatment with E2, TGF‑β1 and hypoxia. Therefore, the migration ability of E2‑, TGF‑β1‑ and hypoxia‑treated MCF‑7 cells was enhanced compared with control cells. In addition, the enhancement of apoptosis by 5‑flurouracil or radiation was abolished following treatment with E2, TGF‑β1 and hypoxia. These results indicate that E2, TGF‑β1 and hypoxia are important for regulating breast CSCs, and that the modulation of the microenvironment in tumors may improve the efficiency of breast cancer therapy.
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Copy and paste a formatted citation
Spandidos Publications style
Park SJ, Kim JG, Kim ND, Yang K, Shim JW and Heo K: Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration. Oncol Lett 11: 1895-1902, 2016.
APA
Park, S., Kim, J., Kim, N.D., Yang, K., Shim, J.W., & Heo, K. (2016). Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration. Oncology Letters, 11, 1895-1902. https://doi.org/10.3892/ol.2016.4115
MLA
Park, S., Kim, J., Kim, N. D., Yang, K., Shim, J. W., Heo, K."Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration". Oncology Letters 11.3 (2016): 1895-1902.
Chicago
Park, S., Kim, J., Kim, N. D., Yang, K., Shim, J. W., Heo, K."Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration". Oncology Letters 11, no. 3 (2016): 1895-1902. https://doi.org/10.3892/ol.2016.4115
Copy and paste a formatted citation
x
Spandidos Publications style
Park SJ, Kim JG, Kim ND, Yang K, Shim JW and Heo K: Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration. Oncol Lett 11: 1895-1902, 2016.
APA
Park, S., Kim, J., Kim, N.D., Yang, K., Shim, J.W., & Heo, K. (2016). Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration. Oncology Letters, 11, 1895-1902. https://doi.org/10.3892/ol.2016.4115
MLA
Park, S., Kim, J., Kim, N. D., Yang, K., Shim, J. W., Heo, K."Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration". Oncology Letters 11.3 (2016): 1895-1902.
Chicago
Park, S., Kim, J., Kim, N. D., Yang, K., Shim, J. W., Heo, K."Estradiol, TGF‑β1 and hypoxia promote breast cancer stemness and EMT‑mediated breast cancer migration". Oncology Letters 11, no. 3 (2016): 1895-1902. https://doi.org/10.3892/ol.2016.4115
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