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Article

Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion

  • Authors:
    • Nathalie Khoury
    • Stephany El‑Hayek
    • Omayr Tarras
    • Marwan  El‑Sabban
    • Mirvat El‑Sibai
    • Sandra Rizk
  • View Affiliations / Copyright

    Affiliations: Department of Natural Sciences, Lebanese American University, Beirut 1102 2801, Lebanon, Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut 1107 2020, Lebanon
  • Pages: 2117-2127
    |
    Published online on: September 3, 2014
       https://doi.org/10.3892/ijo.2014.2635
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Abstract

Kefir, a fermented milk product, exhibits anti‑tumoral activity in vivo; yet its mechanism of action remains elusive. Recent studies have focused on the mechanism of action of kefir on cancer cells in vitro. The current study aims at examining the effect of kefir on cell survival, proliferation, and motility of colorectal cancer (CRC) cells. Kefir's anti‑cancer potential was tested on CRC cell lines, Caco‑2 and HT‑29, through cytotoxicity, proliferation, and apoptotic assays. The expression of certain genes involved in proliferation and apoptosis was measured using reverse transcriptase‑polymerase chain reaction (RT‑PCR) and western blotting. To assess the effect of kefir on cancer metastasis, wound‑healing and time‑lapse movies, in addition to collagen‑based invasion assay, were used. The results show that cell‑free fractions of kefir exhibit an anti‑proliferative effect on Caco‑2 and HT‑29 cells. Analysis of DNA content by flow cytometry revealed the ability of kefir to induce cell cycle arrest at the G1 phase. Kefir was also found to induce apoptosis, as seen by cell death ELISA. Results from RT‑PCR showed that kefir decreases the expression of transforming growth factor α (TGF‑α); and transforming growth factor‑β1 (TGF‑β1) in HT‑29 cells. Western blotting results revealed an upregulation in Bax:Bcl‑2 ratio, confirming the pro‑apoptotic effect of kefir, and an increase in p53 independent‑p21 expression upon kefir treatment. MMP expression was not altered by kefir treatment. Furthermore, results from time‑lapse motility movies, wound‑healing, and invasion assays showed no effect on the motility of colorectal as well as breast (MCF‑7 and MB‑MDA‑231) cancer cells upon kefir treatment. Our data suggest that kefir is able to inhibit the proliferation and induce apoptosis in HT‑29 and Caco‑2 CRC cells, yet it does not exhibit a significant effect on the motility and invasion of these cells in vitro.
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Copy and paste a formatted citation
Spandidos Publications style
Khoury N, El‑Hayek S, Tarras O, El‑Sabban M, El‑Sibai M and Rizk S: Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion. Int J Oncol 45: 2117-2127, 2014.
APA
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., & Rizk, S. (2014). Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion. International Journal of Oncology, 45, 2117-2127. https://doi.org/10.3892/ijo.2014.2635
MLA
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., Rizk, S."Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion". International Journal of Oncology 45.5 (2014): 2117-2127.
Chicago
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., Rizk, S."Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion". International Journal of Oncology 45, no. 5 (2014): 2117-2127. https://doi.org/10.3892/ijo.2014.2635
Copy and paste a formatted citation
x
Spandidos Publications style
Khoury N, El‑Hayek S, Tarras O, El‑Sabban M, El‑Sibai M and Rizk S: Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion. Int J Oncol 45: 2117-2127, 2014.
APA
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., & Rizk, S. (2014). Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion. International Journal of Oncology, 45, 2117-2127. https://doi.org/10.3892/ijo.2014.2635
MLA
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., Rizk, S."Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion". International Journal of Oncology 45.5 (2014): 2117-2127.
Chicago
Khoury, N., El‑Hayek, S., Tarras, O., El‑Sabban, M., El‑Sibai, M., Rizk, S."Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion". International Journal of Oncology 45, no. 5 (2014): 2117-2127. https://doi.org/10.3892/ijo.2014.2635
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