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Article

Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol

  • Authors:
    • Pamela Cruz
    • Cristian Torres
    • María E. Ramírez
    • María J. Epuñán
    • Luis E. Valladares
    • Walter D. Sierralta
  • View Affiliations / Copyright

    Affiliations: Laboratorio de Nutrición y Regulación Metabólica, INTA-Universidad de Chile, Santiago 7830489, Chile
  • Pages: 531-536
    |
    Published online on: May 1, 2010
       https://doi.org/10.3892/etm_00000084
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Abstract

The aim of the present study was to identify the possible mechanisms by which certain estradiol receptor (ER)-positive mammary tumor cells remain resistant to treatment with anti-estrogens or inhibitors of local estradiol (E2) production. To this end, we compared the proliferative effects on mammary cancer cells of the novel selective ER modulator 27-hydroxycholesterol (27OHC) to those of E2, and evaluated their inhibition by ICI 182,780 (ICI). Analysis of the effects on the cell cycle of 27OHC and E2 in the absence or presence of ICI was conducted. In ER-positive mammary tumor cells, we detected the blocking of 27OHC proliferation-stimulatory activity by simvastatin, as well as the inhibition of E2-stimulated proliferation by an α-fetoprotein-derived cyclic nonapeptide. The effects reported herein may be extrapolated to infiltrating mammary cancer, where the activity of local macrophages may stimulate tumor growth. We suggest that increased breast cancer growth in obese patients may be related to increased 27OHC circulatory levels.
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Copy and paste a formatted citation
Spandidos Publications style
Cruz P, Torres C, Ramírez ME, Epuñán MJ, Valladares LE and Sierralta WD: Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol . Exp Ther Med 1: 531-536, 2010.
APA
Cruz, P., Torres, C., Ramírez, M.E., Epuñán, M.J., Valladares, L.E., & Sierralta, W.D. (2010). Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol . Experimental and Therapeutic Medicine, 1, 531-536. https://doi.org/10.3892/etm_00000084
MLA
Cruz, P., Torres, C., Ramírez, M. E., Epuñán, M. J., Valladares, L. E., Sierralta, W. D."Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol ". Experimental and Therapeutic Medicine 1.3 (2010): 531-536.
Chicago
Cruz, P., Torres, C., Ramírez, M. E., Epuñán, M. J., Valladares, L. E., Sierralta, W. D."Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol ". Experimental and Therapeutic Medicine 1, no. 3 (2010): 531-536. https://doi.org/10.3892/etm_00000084
Copy and paste a formatted citation
x
Spandidos Publications style
Cruz P, Torres C, Ramírez ME, Epuñán MJ, Valladares LE and Sierralta WD: Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol . Exp Ther Med 1: 531-536, 2010.
APA
Cruz, P., Torres, C., Ramírez, M.E., Epuñán, M.J., Valladares, L.E., & Sierralta, W.D. (2010). Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol . Experimental and Therapeutic Medicine, 1, 531-536. https://doi.org/10.3892/etm_00000084
MLA
Cruz, P., Torres, C., Ramírez, M. E., Epuñán, M. J., Valladares, L. E., Sierralta, W. D."Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol ". Experimental and Therapeutic Medicine 1.3 (2010): 531-536.
Chicago
Cruz, P., Torres, C., Ramírez, M. E., Epuñán, M. J., Valladares, L. E., Sierralta, W. D."Proliferation of human mammary cancer cells exposed to 27-hydroxycholesterol ". Experimental and Therapeutic Medicine 1, no. 3 (2010): 531-536. https://doi.org/10.3892/etm_00000084
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