Shi CJ, Qin RY, Wang M, Tian R, Zhang ZF, Gong WQ. Identification of tumor spheres from human gallbladder carcinoma GBC-SD cells cultured in serum-free medium.
Shijie Huaren Xiaohua Zazhi 2010;
18:865-870. [DOI:
10.11569/wcjd.v18.i9.865]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To isolate and expand cancer stem cells in human gallbladder carcinoma cell line GBC-SD and to identify their biological properties.
METHODS: GBC-SD cells were cultured in serum-free conditions to derive tumor spheres. Tumor spheres were then expanded and cultured in serum-containing medium to permit their differentiation. The proliferative capacity of tumor sphere-forming cells was tested by methyl thiazoly tetrazolium (MTT) assay. The tumorigenicity of tumor sphere-forming cells was evaluated using animal experiments. The expression of CD15s and CD24 on the surface of tumor sphere-forming cells was detected by flow cytometry.
RESULTS: Small number of floating tumor spheres were isolated and expanded in serum-free conditions. These tumor spheres attached to the bottom of culture plates and began to differentiate in serum-containing medium. The proliferation and xenograft tumorigenicity of tumor sphere-forming cells (80.00% vs 10.00%, P < 0.05) significantly increased compared with those cultured in serum-containing conditions. The percentage of CD15s-bearing cell population was significantly higher in tumor spheres than in the common GBC-SD cells (2.56% ± 0.38% vs 10.77% ± 0.93%, t = 18.25, P < 0.05).
CONCLUSION: The cancer stem cells in GBC-SD cell line can be isolated and expanded in serum-free conditions. CD15s may be a cell surface marker for these cancer stem cells.
Collapse