Effect of gastric cancer stem cells CSC-G on invasion and metastasis of gastric cancer cells / 中国组织工程研究

ABSTRACT

BACKGROUND:Studies have shown that cancer stem cels play an important role in tumor invasion and metastasis, but studies on the role of gastric cancer stem cels in invasion and metastasis of gastric cancer cels were rarely reported. OBJECTIVE:To study the effect of gastric cancer stem cels CSC-G on invasion and metastasis of gastric cancer cels. METHODS: Gastric cancer stem cels CSC-G and gastric cancer cels SGC7901 were culturedin vitro for 10 days folowed by spherical colony formation assay, western blot assay for detecting OCT4, SOX2, E-cadherin and CD44 protein expression levels in gastric cancer stem cels CSC-G and gastric cancer cels SGC7901, and Transwel assay for detecting the invasion and migration of gastric cancer stem cels and gastric cancer cels SGC7901. RESULTS AND CONCLUSION:Gastric cancer cels SGC7901 in RPMI1640 medium presented with adherent growth and were quadrilateral or polygonal after passage; gastric cancer stem cels CSC-G in serum-free medium presented with suspension growth, and adherent gastric cancer stem cels were spindle-shaped or round. Compared with gastric cancer cels SGC7901, the protein expressions of OCT4, SOX2 and CD44, the number of cancer cel spheres and the number of trans-membrane cels were significantly increased in the gastric cancer stem cels CSC-G (P < 0.05), and the expression of E-cadherin protein was significantly decreased (P < 0.05). These findings indicate that the gastric cancer stem cels CSC-G can be successfuly cultured in vitro, and have enhanced invasion and migration compared with the gastric cancer cels SGC7901, which play an important role in gastric cancer invasion and metastasis.