title: Hepatocellular carcinoma cells containing hepatitis B virus X protein have enhanced invasive potential conditionally.
abstract: OBJECTIVE
  To establish a sustaining hepatitis B virus X protein expressed Chang liver cell line and to explore their biological behaviours of invasive potential induced by hepatitis B virus X protein.
  
  
  METHODS
  Polymerase chain reaction was used to amplify the HBx gene from the whole hepatitis B virus genome. The gene was then subcloned into the eukaryotic expression vector pcDNA3.1 to construct the pcDNA3.1-HBx plasmid. Gene transfection mediated by Lipofectamine was used to introduce the plasmid into the human liver cell line Chang, and stable expression of the HBx gene was detected.
  
  
  RESULTS
  HBx gene was cloned from the transfected Chang liver cells by reverse transcription-polymerase chain reaction, and confirmed by electrophoresis. The stably transfected Chang cells expressing HBx with malignant characteristics were verified and compared with control cells in terms of their growth curves, clonogenicity, wound healing abilities, migration and metastasis.
  
  
  CONCLUSIONS
  The stabilising human liver cell lines Chang liver containing HBx gene expression have been established successfully. The invasive potential of Chang cells was conditionally enhanced by HBx transfection.
authors.affiliation: Liver Cancer Laboratory, Department of Surgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
authors.forename: D-P
authors.initials: DP
authors.lastname: Ou
authors.forename: Y-M
authors.initials: YM
authors.lastname: Tao
authors.forename: Z-G
authors.initials: ZG
authors.lastname: Chang
authors.forename: F-Q
authors.initials: FQ
authors.lastname: Tang
authors.forename: L-Y
authors.initials: LY
authors.lastname: Yang
mesh_terms: D000818:Animals; D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D005822:Genetic Vectors; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics* / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009361:Neoplasm Invasiveness / Q000235:genetics*; D016133:Polymerase Chain Reaction; D015534:Trans-Activators / Q000235:genetics*; D014162:Transfection; D054334:Viral Regulatory and Accessory Proteins
chemical_list: D015534:Trans-Activators; D054334:Viral Regulatory and Accessory Proteins; C057628:hepatitis B virus X protein