title: Calcitriol inhibits the growth of MHCC97 heptocellular cell lines by down-modulating c-met and ERK expressions.
abstract: BACKGROUND
  Previous studies have demonstrated that Calcitriol or its analogs has an anti-tumour activity. This study was designed to determine the effect and mechanism of Calcitriol on MHCC-97 heptocellular cell lines.
  
  
  METHODS
  MHCC97 cell lines were treated with Calcitriol of 10(-6) approximately 10(-9) M concentration and with Calcitriol in lipiodol ultra-fluid (LUF) respectively. The conditions of cell proliferation were analyzed by MTT method. The cell apoptosis and cycle were analyzed by using a flow cytometer. Hepatocyte growth factor (HGF) concentration in the cell supernatant was measured by using ELISA method. C-met and vitamin D receptor (VDR) mRNA in cells were determined by using RT-PCR method. VDR and ERK(1/2) proteins were determined by using Western Blotting method.
  
  
  RESULTS
  Calcitriol inhibited the proliferation of MHCC97 cell lines with an accumulation of cells in the G(0)/G(1) phase and reduction of cells in S phase. Calcitriol dissolved in LUF resulted in a better and longer inhibitive effect on the cell lines than Calcitriol alone. MHCC97 cell lines secreted HGF and expressed c-met mRNA and ERK(1/2) proteins abundantly. Calcitriol remarkably inhibited the expressions of c-met mRNA and ERK(1/2) proteins.
  
  
  CONCLUSIONS
  Calcitriol inhibits the growth of MHCC-97 heptocellular cell lines by down modulating c-met and ERK expressions.
authors.affiliation: Department of Oncological Surgery, First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, Zhejiang Province, China.
authors.forename: Fu-Sheng
authors.initials: FS
authors.lastname: Wu
authors.forename: Shu-Sen
authors.initials: SS
authors.lastname: Zheng
authors.forename: Ling-Jiao
authors.initials: LJ
authors.lastname: Wu
authors.forename: Li-Song
authors.initials: LS
authors.lastname: Teng
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Ma
authors.forename: Wen-He
authors.initials: WH
authors.lastname: Zhao
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D002117:Calcitriol / Q000494:pharmacology* / Q000627:therapeutic use; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy*; D002453:Cell Cycle / Q000187:drug effects; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D017228:Hepatocyte Growth Factor / Q000378:metabolism; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy*; D019859:Proto-Oncogene Proteins c-met / Q000378:metabolism; D018167:Receptors, Calcitriol / Q000378:metabolism; D014815:Vitamins / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D018167:Receptors, Calcitriol; D014815:Vitamins; D017228:Hepatocyte Growth Factor; D019859:Proto-Oncogene Proteins c-met; D048049:Extracellular Signal-Regulated MAP Kinases; D002117:Calcitriol