人食管癌细胞株KYSE-150、TE-1中肿瘤干细胞的培养分化及增殖侵袭能力分析

Culture,differentiation, proliferation and invasion of tumor stem cells in human esophageal carcinoma cell lines KYSE-150 and TE-1

BACKGROUND: There is a certain cell subset in esophageal cancer tissues, with certain invasive and metastatic properties, which is closely related to the clinical therapeutic effect on tumors. OBJECTIVE: To isolate tumor stem cell spheres in human esophageal carcinoma cell lines KYSE-150 and TE-1 and to analyze their proliferation and invasion ability.METHODS: KYSE-150 and TE-1 cells were cultured in serum-free medium to observe the formation of cell spheres. Cell proliferation and invasion were detected using MTT and Transwell chamber culture. Surface markers of cells were detected using flow cytometry. RESULTS AND CONCLUSION: Cell spheres that were stably subcultured were obtained from KYSE-150 and TE-1 cells cultured in serum-free medium. The proliferation and invasion abilities of cell spheres were significantly stronger than those of parent cells (P < 0.05). The number of CD44+, CD271+ and CD44+CD271+ cells in TE-1 and KYSE-150 cell spheres was significantly higher than that in the TE-1 and KYSE-150 parent cells (P < 0.05). These experimental results show that cell spheres isolated from human esophageal carcinoma cell lines TE-1 and KYSE-150 have tumor stem cell properties as well as strong proliferation and invasion abilities. And moreover, CD44 and CD271 can be used as important surface markers of esophageal carcinoma stem cells.