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Article Open Access

Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features

  • Authors:
    • Robert Gelfand
    • Dolores Vernet
    • Kevin W. Bruhn
    • Suren Sarkissyan
    • David Heber
    • Jaydutt V. Vadgama
    • Nestor F. Gonzalez-Cadavid
  • View Affiliations / Copyright

    Affiliations: Department of Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA, Department of Medicine and Human Nutrition, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
    Copyright: © Gelfand et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 49-65
    |
    Published online on: December 9, 2016
       https://doi.org/10.3892/ijo.2016.3800
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Abstract

Alcohol consumption is a risk factor for breast cancer. Little is known regarding the mechanism, although it is assumed that acetaldehyde or estrogen mediated pathways play a role. We previously showed that long-term exposure to 2.5 mM ethanol (blood alcohol ~0.012%) of MCF-12A, a human normal epithelial breast cell line, induced epithelial mesenchymal transition (EMT) and oncogenic transformation. In this study, we investigated in the human breast cancer cell line MCF-7, whether a similar exposure to ethanol at concentrations ranging up to peak blood levels in heavy drinkers would increase malignant progression. Short-term (1-week) incubation to ethanol at as low as 1-5 mM (corresponding to blood alcohol concentration of ~0.0048-0.024%) upregulated the stem cell related proteins Oct4 and Nanog, but they were reduced after exposure at 25 mM. Long-term (4-week) exposure to 25 mM ethanol upregulated the Oct4 and Nanog proteins, as well as the malignancy marker Ceacam6. DNA microarray analysis in cells exposed for 1 week showed upregulated expression of metallothionein genes, particularly MT1X. Long-term exposure upregulated expression of some malignancy related genes (STEAP4, SERPINA3, SAMD9, GDF15, KRT15, ITGB6, TP63, and PGR, as well as the CEACAM, interferon related, and HLA gene families). Some of these findings were validated by RT-PCR. A similar treatment also modulated numerous microRNAs (miRs) including one regulator of Oct4 as well as miRs involved in oncogenesis and/or malignancy, with only a few estrogen-induced miRs. Long-term 25 mM ethanol also induced a 5.6-fold upregulation of anchorage-independent growth, an indicator of malignant-like features. Exposure to acetaldehyde resulted in little or no effect comparable to that of ethanol. The previously shown alcohol induction of oncogenic transformation of normal breast cells is now complemented by the current results suggesting alcohol's potential involvement in malignant progression of breast cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Gelfand R, Vernet D, Bruhn KW, Sarkissyan S, Heber D, Vadgama JV and Gonzalez-Cadavid NF: Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features. Int J Oncol 50: 49-65, 2017.
APA
Gelfand, R., Vernet, D., Bruhn, K.W., Sarkissyan, S., Heber, D., Vadgama, J.V., & Gonzalez-Cadavid, N.F. (2017). Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features. International Journal of Oncology, 50, 49-65. https://doi.org/10.3892/ijo.2016.3800
MLA
Gelfand, R., Vernet, D., Bruhn, K. W., Sarkissyan, S., Heber, D., Vadgama, J. V., Gonzalez-Cadavid, N. F."Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features". International Journal of Oncology 50.1 (2017): 49-65.
Chicago
Gelfand, R., Vernet, D., Bruhn, K. W., Sarkissyan, S., Heber, D., Vadgama, J. V., Gonzalez-Cadavid, N. F."Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features". International Journal of Oncology 50, no. 1 (2017): 49-65. https://doi.org/10.3892/ijo.2016.3800
Copy and paste a formatted citation
x
Spandidos Publications style
Gelfand R, Vernet D, Bruhn KW, Sarkissyan S, Heber D, Vadgama JV and Gonzalez-Cadavid NF: Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features. Int J Oncol 50: 49-65, 2017.
APA
Gelfand, R., Vernet, D., Bruhn, K.W., Sarkissyan, S., Heber, D., Vadgama, J.V., & Gonzalez-Cadavid, N.F. (2017). Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features. International Journal of Oncology, 50, 49-65. https://doi.org/10.3892/ijo.2016.3800
MLA
Gelfand, R., Vernet, D., Bruhn, K. W., Sarkissyan, S., Heber, D., Vadgama, J. V., Gonzalez-Cadavid, N. F."Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features". International Journal of Oncology 50.1 (2017): 49-65.
Chicago
Gelfand, R., Vernet, D., Bruhn, K. W., Sarkissyan, S., Heber, D., Vadgama, J. V., Gonzalez-Cadavid, N. F."Long-term exposure of MCF-7 breast cancer cells to ethanol stimulates oncogenic features". International Journal of Oncology 50, no. 1 (2017): 49-65. https://doi.org/10.3892/ijo.2016.3800
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