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Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin

  • Authors:
    • Zefeng Zhang
    • Xiaoling Bu
    • Hao Chen
    • Qiyi Wang
    • Weihong Sha
  • View Affiliations / Copyright

    Affiliations: Shantou University Medical College, Shantou, Guangdong 515041, P.R. China, Department of Gastroenterology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, P.R. China
    Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1199-1207
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    Published online on: September 7, 2016
       https://doi.org/10.3892/ijmm.2016.2730
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Abstract

Metastasis and recurrence are the challenges of cancer therapy. Recently, mounting evidence has suggested that cancer stem cells (CSCs) and epithelial-mesenchymal transition (EMT) are critical factors in tumor metastasis and recurrence. The oncogene, Bmi-1, promotes the development of hematologic malignancies and many solid tumors. The aim of the present study was to elucidate the mechanisms through which Bmi-1 promotes the invasion and migration of colon CSCs (CCSCs) using the HCT116 colon cancer cell line. Sphere formation medium and magnetic‑activated cell sorting were used to enrich and screen the CCSCs. CD133 and CD44 were regarded as markers of CCSCs and they were found to be co-expressed in the HCT116 colon cancer cell line. Colony formation assay, cell proliferation assay and viability assay using the Cell Counting Kit-8, and transplantation assay using nude mice injected with CCSCs were used to examine the CCSCs. The CD133+CD44+ HCT116 cells exhibited greater cloning efficiency, an enhanced proliferative ability, increased cell viability and stronger tumorigenicity; these cells were used as the CCSCs for subsequent experiments. In addition, the invasive and migratory abilities of the CD133+CD44+ HCT116 cells were markedly decreased when Bmi-1 was silenced by small interfering RNA (siRNA). The results of RT-qPCR and western blot analysis suggested that Bmi-1 had a negative effect on E-cadherin expression. On the whole, our findings suggest that Bmi-1 promotes the invasion and migration of CCSCs through the downregulation of E-cadherin, possibly by inducing EMT. Our findings thus indicate that Bmi-1 may be a novel therapeutic target for the treatment of colon cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang Z, Bu X, Chen H, Wang Q and Sha W: Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin. Int J Mol Med 38: 1199-1207, 2016.
APA
Zhang, Z., Bu, X., Chen, H., Wang, Q., & Sha, W. (2016). Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin. International Journal of Molecular Medicine, 38, 1199-1207. https://doi.org/10.3892/ijmm.2016.2730
MLA
Zhang, Z., Bu, X., Chen, H., Wang, Q., Sha, W."Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin". International Journal of Molecular Medicine 38.4 (2016): 1199-1207.
Chicago
Zhang, Z., Bu, X., Chen, H., Wang, Q., Sha, W."Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin". International Journal of Molecular Medicine 38, no. 4 (2016): 1199-1207. https://doi.org/10.3892/ijmm.2016.2730
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang Z, Bu X, Chen H, Wang Q and Sha W: Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin. Int J Mol Med 38: 1199-1207, 2016.
APA
Zhang, Z., Bu, X., Chen, H., Wang, Q., & Sha, W. (2016). Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin. International Journal of Molecular Medicine, 38, 1199-1207. https://doi.org/10.3892/ijmm.2016.2730
MLA
Zhang, Z., Bu, X., Chen, H., Wang, Q., Sha, W."Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin". International Journal of Molecular Medicine 38.4 (2016): 1199-1207.
Chicago
Zhang, Z., Bu, X., Chen, H., Wang, Q., Sha, W."Bmi-1 promotes the invasion and migration of colon cancer stem cells through the downregulation of E-cadherin". International Journal of Molecular Medicine 38, no. 4 (2016): 1199-1207. https://doi.org/10.3892/ijmm.2016.2730
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