TGF-β1β改变胃癌细胞microRNA表达谱.pdf

Original Article TGF-β1 alters microRNA profile in human gastric cancer cells Haiyan Zhou, Kuansong Wang, Zhongliang Hu, Jifang Wen Department of Pathology, Xiang-ya School of Medicine, Central South University, Changsha 410013, China Corresponding to: Jifang Wen. Department of Pathology, Xiang-ya School of Medicine, Central South University, Changsha 410013, China. Email: jifangwen@. Objective: MicroRNAs (miRNAs) are important regulators that play a key role in tumorigenesis and tumor β β progression. Transforming growth factor- 1 (TGF- 1) is involved in invasion and metastasis in many tumors. In this study, we investigated the microRNAs (miRNA) profiles altered by TGF-β1 in gastric cancer (GC) cells. Methods: We detected the expression profiles of miRNA by miRNA microarray and quantitative real- time polymerase chain reaction. Migration and invasion, wound-healing assay, prediction of miRNA targets, Western blot and qRT-PCR analysis were carried out to determine the role of one selected miRNA, namely miR-193b, in affecting the biological behaviors of GC BGC823 cells. Results: Among 847 human miRNAs in the microarray, three miRNAs (miR-27a, miR-29b-1 and miR-194) were up-regulated and three (miR-574-3p, miR-193b and miR-130b) were down-regulated in BGC823 cells treated with TGF-β1 compared with control. miR-193b suppressed the invasion and metastasis of GC cells in vivo and in vitro, and down-regulated urokinase-type plasminogen activator (uPA) protein in GC cells. Conclusions: TGF-β1 altered miRNA expression profile in BGC823 cells. Among the altered miRNAs, TGF-β1 induced the down-regulation of miR-193b, which inhibited cell invasion and metastasis in vivo and