title: [Expression of microRNA-107 in hepatocellular carcinoma and its clinical significance].
abstract: OBJECTIVE
  To investigate the expression of microRNA-107 (miR-107) and its functional role in hepatocellular carcinoma(HCC).
  
  
  METHODS
  The gene chip data of HCC obtained from the Gene Expression Omnibus (GEO) database and the Cancer Genome Atlas (TCGA) database were used to analyze the expression levels of miR-107 in liver cancer. Twenty-two pairs of fresh surgical specimens of HCC and adjacent tissues and 53 paraffin-embedded specimens of HCC were examined for miR-107 expression by qRT-PCR. The correlation of the expression levels of miR-107 with the clinicopathologic characteristics of the patients were analyzed. The role of miR-107 in regulating the proliferation of hepatocellular carcinoma cells were determined by MTT assay in Huh7 cells transfected with a miR-107 mimic or inhibitor.
  
  
  RESULTS
  The expression levels of miR-107 were significantly up-regulated in HCC tissues as compared to the adjacent tissues (P<0.05) in positive correlation with the tumor size (P<0.032). Transfection with miR-107 mimics significantly promoted the cell proliferation (P<0.0001) while miR-107 inhibitor inhibited the cell proliferation (P<0.0001).
  
  
  CONCLUSIONS
  The expression of miR-107 is up- regulated in HCC tissues and its expression levels are correlated with HCC cell proliferation, suggesting its role as a potential oncogene in liver cancer.
authors.affiliation: Hepatology Unit of Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.E-mail: 15622178423@163.com.
authors.forename: Lu-Shan
authors.initials: LS
authors.lastname: Xiao
authors.forename: Xue-Jing
authors.initials: XJ
authors.lastname: Zou
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.forename: Li
authors.initials: L
authors.lastname: Liu
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000235:genetics*; D049109:Cell Proliferation; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics*; D035683:MicroRNAs / Q000235:genetics*; D015533:Transcriptional Activation; D015854:Up-Regulation
chemical_list: C549045:MIRN107 microRNA, human; D035683:MicroRNAs