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Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties

  • Authors:
    • Jianming Liu
    • Lilin Ma
    • Junfei Xu
    • Chun Liu
    • Jianguo Zhang
    • Jie Liu
    • Ruixin Chen
    • Youlang Zhou
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, Affiliated Hospital, Nantong University, Nantong 226001, Jiangsu Province, P.R. China, Laboratory Animal Center, Nantong University, Nantong 226001, Jiangsu Province, P.R. China, Department of Pathology, Affiliated Hospital, Nantong University, Nantong 226001, Jiangsu Province, P.R. China, Research Center of Clinical Medicine, Affiliated Hospital, Nantong University, Nantong 226001, Jiangsu Province, P.R. China
    Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 453-459
    |
    Published online on: November 29, 2012
       https://doi.org/10.3892/ijo.2012.1720
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Abstract

The cancer stem cell theory hypothesizes that cancer stem cells (CSCs), which possess self-renewal and other stem cell properties, are regarded as the cause of tumor formation, recurrence and metastasis. The isolation and identification of CSCs could help to develop novel therapeutic strategies specifically targeting CSCs. In this study, we enriched gastric cancer stem cells through spheroid body formation by cultivating the human gastric cancer cell line MKN-45 in defined serum-free medium. The stemness characteristics of spheroid body-forming cells, including self-renewal, proliferation, chemoresistance, tumorigenicity of the MKN-45 spheroid body-forming cells were evaluated, and the expression levels of stemness genes and related proteins in the MKN-45 spheroid body-forming cells were assessed. Furthermore, immunofluorescence staining for the stem cell markers on spheroid body-forming cells was examined to evaluate the association between stemness factors (Oct4, Sox2, Nanog) and the proposed CSC marker CD44. Our data demonstrated that non-adherent spheroid body-forming cells from the gastric cancer cell line MKN-45 cultured in stem cell-conditioned medium possessed gastric CSC properties, such as persistent self-renewal, extensive proliferation, drug resistance, high tumorigenic capacity and overexpression of CSC-related genes and proteins (Oct4, Sox2, Nanog and CD44), compared with the parental cells. More importantly, CD44-positive cells co-expressing the pluripotency genes Oct4, Sox2 and Nanog may represent gastric CSCs. Further experiments using more refined selection criteria such as a combination of two or multiple markers would be useful to specifically identify and purify CSCs.
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Copy and paste a formatted citation
Spandidos Publications style
Liu J, Ma L, Xu J, Liu C, Zhang J, Liu J, Chen R and Zhou Y: Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties. Int J Oncol 42: 453-459, 2013.
APA
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J. ... Zhou, Y. (2013). Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties. International Journal of Oncology, 42, 453-459. https://doi.org/10.3892/ijo.2012.1720
MLA
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J., Chen, R., Zhou, Y."Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties". International Journal of Oncology 42.2 (2013): 453-459.
Chicago
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J., Chen, R., Zhou, Y."Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties". International Journal of Oncology 42, no. 2 (2013): 453-459. https://doi.org/10.3892/ijo.2012.1720
Copy and paste a formatted citation
x
Spandidos Publications style
Liu J, Ma L, Xu J, Liu C, Zhang J, Liu J, Chen R and Zhou Y: Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties. Int J Oncol 42: 453-459, 2013.
APA
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J. ... Zhou, Y. (2013). Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties. International Journal of Oncology, 42, 453-459. https://doi.org/10.3892/ijo.2012.1720
MLA
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J., Chen, R., Zhou, Y."Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties". International Journal of Oncology 42.2 (2013): 453-459.
Chicago
Liu, J., Ma, L., Xu, J., Liu, C., Zhang, J., Liu, J., Chen, R., Zhou, Y."Spheroid body-forming cells in the human gastric cancer cell line MKN-45 possess cancer stem cell properties". International Journal of Oncology 42, no. 2 (2013): 453-459. https://doi.org/10.3892/ijo.2012.1720
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