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Article

Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction

  • Authors:
    • Chun-Ping Wu
    • Huai-Dong Du
    • Hong-Li Gong
    • Da-Wei Li
    • Lei Tao
    • Jie Tian
    • Liang Zhou
  • View Affiliations / Copyright

    Affiliations: Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai 200031, P.R. China, Research Center, Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai 200031, P.R. China
  • Pages: 1652-1660
    |
    Published online on: February 20, 2014
       https://doi.org/10.3892/ijo.2014.2307
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Abstract

Evidence indicates that a hypoxic micro­environment plays an essential role in the regulation of cancer stem cells (CSCs). However, whether hypoxia is able to regulate the stem-like biological properties of laryngeal cancer cells remains unknown. In this study, we investigated the influence of hypoxia on the stemness of two laryngeal cancer cell lines, Hep-2 and AMC-HN-8. We cultured the two cell lines under hypoxia and normoxia and examined the influence of hypoxia on the expression of hypoxia-inducible factors (HIFs) and the cancer stem-like properties of these cells, including cell cycle distribution, expression of stem cell genes (OCT4, SOX2 and NANOG) and laryngeal CSC surface marker (CD133), proliferation, invasion, colony formation and sphere formation capacity. We determined that both of these cell lines, when maintained under hypoxic conditions, showed expanded cells in the G0/G1 phase, exhibited preferential expression of stem cell genes and CD133, and manifested upregulation of HIFs. When treated with hypoxia followed by normoxia exposure, the two cell lines exhibited enhanced capacities for proliferation, invasion, and sphere and colony formation compared with cells maintained consistently under normoxia. Our findings indicate that a hypoxic microenvironment may upgrade the stem-like biological properties of laryngeal cancer cell lines by the expansion of the CD133+ stem cell fraction.
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Copy and paste a formatted citation
Spandidos Publications style
Wu C, Du H, Gong H, Li D, Tao L, Tian J and Zhou L: Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction. Int J Oncol 44: 1652-1660, 2014.
APA
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., & Zhou, L. (2014). Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction. International Journal of Oncology, 44, 1652-1660. https://doi.org/10.3892/ijo.2014.2307
MLA
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., Zhou, L."Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction". International Journal of Oncology 44.5 (2014): 1652-1660.
Chicago
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., Zhou, L."Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction". International Journal of Oncology 44, no. 5 (2014): 1652-1660. https://doi.org/10.3892/ijo.2014.2307
Copy and paste a formatted citation
x
Spandidos Publications style
Wu C, Du H, Gong H, Li D, Tao L, Tian J and Zhou L: Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction. Int J Oncol 44: 1652-1660, 2014.
APA
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., & Zhou, L. (2014). Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction. International Journal of Oncology, 44, 1652-1660. https://doi.org/10.3892/ijo.2014.2307
MLA
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., Zhou, L."Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction". International Journal of Oncology 44.5 (2014): 1652-1660.
Chicago
Wu, C., Du, H., Gong, H., Li, D., Tao, L., Tian, J., Zhou, L."Hypoxia promotes stem-like properties of laryngeal cancer cell lines by increasing the CD133+ stem cell fraction". International Journal of Oncology 44, no. 5 (2014): 1652-1660. https://doi.org/10.3892/ijo.2014.2307
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