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Article

Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs

  • Authors:
    • Yangmei Xu
    • Yunqing Xie
    • Xiangru Wang
    • Xuefang Chen
    • Qingyin Liu
    • Mingang Ying
    • Qiuhong Zheng
  • View Affiliations / Copyright

    Affiliations: Fujian Provincial Key Laboratory of Tumor Biotherapy, Teaching Hospital of Fujian Medical University, Fujian Provincial Tumor Hospital, Fuzhou 350014, P.R. China
  • Pages: 2056-2062
    |
    Published online on: August 28, 2013
       https://doi.org/10.3892/or.2013.2703
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Abstract

The aim of this study was to identify cancer stem cells (CSC) from three hepatocellular carcinoma (HCC) cell lines and to screen for specific microRNAs (miRNAs) regulating CSCs. Side population (SP) phenotype analysis was used. Four factors in the staining process, the incubation time, shaking interval, culture time and Hoechst 33342 concentration were explored, respectively, to define the SP subtype. CSC characteristics of SP cells were verified by sphere-forming assay and tumorigenic ability in NOD/SCID mice. QPCR assay for 370 miRNAs was performed to identify the differential miRNA expression between SP and Non-SP (NSP) cells in the PLC/PRF/5 cell line. The selected miRNAs were tested again in SP and NSP cells from Huh-7 and Hep-3B cell lines by qPCR assay. All four factors influenced SP percentage, when the other three conditions were fixed, the optimal Hoechst 33342 concentrations determined were 11 µg/ml for PLC/PRF/5 cells, 4 µg/ml for Huh-7 and 5 µg/ml for Hep-3B cells. The resultant SP percentage was 0.73±0.12%, 0.49±0.04% and 0.63±0.08%, respectively. The purity of sorted SP cells was >85%. Floating spheres were formed by SP cells from all three cell lines, while NSP cells did not form a single floating sphere. Mice injected with SP cells on the right side formed more tumor masses compared to their counterpart NSP at the same injection dosage; qPCR profiling identified 27 differentially expressed miRNAs in PLC/PRF/5 cells. Subsequent qPCR assay showed that miR-9* and miR-194 were also downregulated in SP cells from Huh-7 and Hep-3B. The present study identified CSCs via SP and sphere-forming assay from three liver cancer cell lines. Altogether, 27 CSC-specific miRNAs were determined in PLC/PRF/5; miR-9* and miR-194 were identified as the common CSC-specific miRNAs across the three HCC cell lines.
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Copy and paste a formatted citation
Spandidos Publications style
Xu Y, Xie Y, Wang X, Chen X, Liu Q, Ying M and Zheng Q: Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs. Oncol Rep 30: 2056-2062, 2013.
APA
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., & Zheng, Q. (2013). Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs. Oncology Reports, 30, 2056-2062. https://doi.org/10.3892/or.2013.2703
MLA
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., Zheng, Q."Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs". Oncology Reports 30.5 (2013): 2056-2062.
Chicago
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., Zheng, Q."Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs". Oncology Reports 30, no. 5 (2013): 2056-2062. https://doi.org/10.3892/or.2013.2703
Copy and paste a formatted citation
x
Spandidos Publications style
Xu Y, Xie Y, Wang X, Chen X, Liu Q, Ying M and Zheng Q: Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs. Oncol Rep 30: 2056-2062, 2013.
APA
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., & Zheng, Q. (2013). Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs. Oncology Reports, 30, 2056-2062. https://doi.org/10.3892/or.2013.2703
MLA
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., Zheng, Q."Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs". Oncology Reports 30.5 (2013): 2056-2062.
Chicago
Xu, Y., Xie, Y., Wang, X., Chen, X., Liu, Q., Ying, M., Zheng, Q."Identification of cancer stem cells from hepatocellular carcinoma cell lines and their related microRNAs". Oncology Reports 30, no. 5 (2013): 2056-2062. https://doi.org/10.3892/or.2013.2703
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