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Preliminary screening and identification of stem cell-like sphere clones in a gallbladder cancer cell line GBC-SD

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第4期12卷 256-263页

作者： Bao-bing YIN Shuang-jie WU Hua-jie ZONG Bao-jin MA Duan CAI Department of General Surgery Huashan Hospital Fudan University Shanghai 200040 China

This paper aims to screen and identify sphere clone cells with characteristics similar to cancer stem cells in human gallbladder cancer cell line ***-SD cells were cultured in a serum-free culture medium with different concentrations of the chemotherapeutic drug cisplatin for generating sphere *** mRNA expressions of stem cell-related genes CD133,OCT-4,Nanog,and drug resistance genes ABCG2 and MDR-1 in sphere clones were detected by quantitative real-time polymerase chain reaction (PCR).Stem cell markers were also analyzed by flow cytometry and immunofluorescent *** amounts of sphere clones were injected into nude mice to test their abilities to form *** clones were formed in serum-free culture medium containing cisplatin (30 μmol/L).Flow cytometry results demonstrated that the sphere clones expressed high levels of stem cell markers CD133+ (97.6%) and CD44+ (77.9%) and low levels of CD24+ (2.3%).These clones also overexpressed the drug resistance genes ABCG2 and *** real-time PCR showed that sphere clones expressed stem cell genes Nanog and OCT-4 284 and 266 times,respectively,more than those in the original GBC-SD *** staining showed that sphere clones overexpressed OCT-4,Nanog,and SOX-2,and low expressed MUC1 and *** formation experiments showed that 1×103 sphere clone cells could induce much larger tumors in nude mice than 1×105 GBC-SD *** conclusion,sphere clones of gallbladder cancer with stem cell-like characteristics can be obtained using suspension cultures of GBC-SD cells in serum-free culture medium containing cisplatin.

关键词： Gallbladder cancer Stem cell gene sphere clone Suspension culture

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