Expression of microRNA-200b in cholangiocarcinoma and its effect on apoptosis and invasivness of cholangiocarcinoma cells / 中华肝胆外科杂志

ABSTRACT

Objective To detect the role of differentially expressed microRNA (miRNA) in human cholangiocarcinoma and explore their effects on apoptosis and invasiveness of cholangiocarcinoma.Methods The differential expression of miRNA in 3 cholangiocarcinoma patients was detected by miRNA array.The expressions of miR-200a,miR-200b,miR-200c,and miR-141 in human cholangiocarcinoma tissues and normal bile duct tissues were detected by real-time PCR.After transfection with miR-200b mimic,apoptosis and invasiveness of human cholangiocarcinoma cell line QBC939 was evaluated by Annexin-V-FITC dyeing and Transwell assay.Results Comparad with normal bile duct tissues,the number of differential miRNAs in cholangiocarcinoma was 21,including 15 up regulated and 6 down regulated.The expressions of miR200a,miR-200b,miR-200c,and miR-141 in human cholangiocarcinoma tissues were significantly lower than levels in normal bile duct tissues.The invasive ability of QBC939 was decreased after miR-200b mimic transfection.The apoptosis cell number of QBC939 was increased after miR-200b mimic transfection.Conclusion These results indicate that the expression of miRNA is different between cholangiocarcinoma and normal bile duct tissues.Moreover,miR-200a,miR-200b,miR-200c,and miR-141 are likely involved in the invasion and metastasis of cholangiocarcinoma and have potential as a diagnostic and prognostic marker.