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Article

Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy

  • Authors:
    • Vildan Betul Yenigun
    • Bulent Ozpolat
    • Gamze Torun Kose
  • View Affiliations / Copyright

    Affiliations: Department of Genetics and Bioengineering, Yeditepe University, Istanbul 34755, Turkey, Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
  • Pages: 1477-1483
    |
    Published online on: April 10, 2013
       https://doi.org/10.3892/ijmm.2013.1342
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Abstract

The cancer stem cell hypothesis emphasizes that cancers are driven by cells having stem cell properties, and it is believed that cancer stem cells (CSCs) may be responsible for resistance against therapeutic approaches and for recurrent tumors. Since the biology of the normal breast requires large numbers of stem cells, it has been thought that breast stem cells play an important role in initiating breast cancer. A better characterization of breast CSCs appears to be an essential step to improve the understanding of the biology of breast cancer and its management. The scope of this study was to isolate breast CSCs from a breast cancer cell line (MCF-7) using cell surface markers, and to test whether these cells have any resistance to autophagic cell death mechanisms mediated by commonly used chemotherapies and hormonal therapies such as doxorubicin (adriamycin) and tamoxifen (anti-estrogen), respectively. For this purpose, the CD44+/CD24-/low MCF-7 breast cancer stem/progenitor cell population was isolated and treated with doxorubicin or tamoxifen and evaluated for their response to growth, autophagy and apoptosis. Our findings suggest that CD44+/CD24-/low cells were less sensitive to doxorubicin, but did not demonstrate a significant difference towards tamoxifen in regards to the induction of autophagy.
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Copy and paste a formatted citation
Spandidos Publications style
Yenigun VB, Ozpolat B and Kose GT: Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy. Int J Mol Med 31: 1477-1483, 2013.
APA
Yenigun, V.B., Ozpolat, B., & Kose, G.T. (2013). Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy. International Journal of Molecular Medicine, 31, 1477-1483. https://doi.org/10.3892/ijmm.2013.1342
MLA
Yenigun, V. B., Ozpolat, B., Kose, G. T."Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy". International Journal of Molecular Medicine 31.6 (2013): 1477-1483.
Chicago
Yenigun, V. B., Ozpolat, B., Kose, G. T."Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy". International Journal of Molecular Medicine 31, no. 6 (2013): 1477-1483. https://doi.org/10.3892/ijmm.2013.1342
Copy and paste a formatted citation
x
Spandidos Publications style
Yenigun VB, Ozpolat B and Kose GT: Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy. Int J Mol Med 31: 1477-1483, 2013.
APA
Yenigun, V.B., Ozpolat, B., & Kose, G.T. (2013). Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy. International Journal of Molecular Medicine, 31, 1477-1483. https://doi.org/10.3892/ijmm.2013.1342
MLA
Yenigun, V. B., Ozpolat, B., Kose, G. T."Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy". International Journal of Molecular Medicine 31.6 (2013): 1477-1483.
Chicago
Yenigun, V. B., Ozpolat, B., Kose, G. T."Response of CD44+/CD24-/low breast cancer stem/progenitor cells to tamoxifen‑ and doxorubicin‑induced autophagy". International Journal of Molecular Medicine 31, no. 6 (2013): 1477-1483. https://doi.org/10.3892/ijmm.2013.1342
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