title: MicroRNA-200a and -200b mediated hepatocellular carcinoma cell migration through the epithelial to mesenchymal transition markers.
abstract: BACKGROUND
  MicroRNAs (miRNAs) play an essential role in mediating gene expression in both normal and malignant cells. However, little is known about specific miRNAs during the development of hepatocellular carcinoma (HCC) from well-differentiated to poorly differentiated cells.
  
  
  METHODS
  We performed miRNA array analysis of three different HCC cell lines: HepG2, HepJ5, and skHep-1. The expression patterns of miR-200 family members were confirmed by real-time polymerase chain reaction (PCR). We overexpressed miR-200 family members by using a lentivirus system and selected for stably transduced cells using antibiotics. The migration ability of the cells was tested using the Transwell migration assay system.
  
  
  RESULTS
  Our miRNA array and real-time PCR results indicated a decrease in the expression of miR-200 family members in poorly differentiated skHep-1 cells compared with well-differentiated HepG2 cells. We overexpressed miR-200a and miR-200b in both HepJ5 and skHep-1 cells and found that the overexpression of the miR-200 family members did not influence proliferation, although migration was decreased in these cells. We found that overexpression of miR-200 family members led to an upregulation of E-cadherin expression in both HepJ5 and skHep-1 cells. Furthermore, we silenced E-cadherin expression by shRNA in miR200a-HepJ5 cells and found that the migratory ability of these cells was enhanced upon the decrease in E-cadherin expression.
  
  
  CONCLUSIONS
  Members of the miR-200 family (miR-200a and miR-200b) play important roles in HCC migration by regulating E-cadherin expression.
authors.affiliation: Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
authors.forename: Chin-Sheng
authors.initials: CS
authors.lastname: Hung
authors.forename: Hui-Hsiung
authors.initials: HH
authors.lastname: Liu
authors.forename: Jun-Jen
authors.initials: JJ
authors.lastname: Liu
authors.forename: Chi-Tai
authors.initials: CT
authors.lastname: Yeh
authors.forename: Tung-Cheng
authors.initials: TC
authors.lastname: Chang
authors.forename: Chih-Hsiung
authors.initials: CH
authors.lastname: Wu
authors.forename: Yuan-Soon
authors.initials: YS
authors.lastname: Ho
authors.forename: Po-Li
authors.initials: PL
authors.lastname: Wei
authors.forename: Yu-Jia
authors.initials: YJ
authors.lastname: Chang
mesh_terms: D014408:Biomarkers, Tumor / Q000235:genetics* / Q000378:metabolism; D015153:Blotting, Western; D015820:Cadherins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D002465:Cell Movement; D002470:Cell Survival; D058750:Epithelial-Mesenchymal Transition; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D035683:MicroRNAs / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014407:Tumor Cells, Cultured
chemical_list: D014408:Biomarkers, Tumor; D015820:Cadherins; C533896:MIRN200 microRNA, human; D035683:MicroRNAs; D012333:RNA, Messenger; D034741:RNA, Small Interfering