title: [Effects of triptolide on cell proliferation and regulation of Ras-MAPKs pathway in synoviocytes induced by tumor necrosis factor].
abstract: OBJECTIVE
  To investigate the effects of triptolide on proliferation and regulation of ras-MAPKs pathway in human fibroblast-like synoviocytes of rheumatoid arthritis (RA-HFLS) treated with tumor necrosis factor (TNF-alpha).
  
  
  METHODS
  RA-HFLS were cultured with TNF-alpha in the presence or absence of variable doses of triptolide (0.28, 2.8, 28, 140 nmol x L(-1)) in vitro. Cell proliferation was evaluated by MTS assay. The phosphorylation status of Ras-MAPKs-associated proteins (Ras, p-P38, p-ERK and p-JNK) were detected by Western blot analysis.
  
  
  RESULTS
  Triptolide could obviously decrease the RA-HFLS viability in a dose-dependent manner and the inhibition ratio was 0.28%, 5.05%, 30.83% and 43.77% respectively. In addition, triptolide could also suppressed the expression of Ras, p-P38, p-ERK and p-JNK.
  
  
  CONCLUSIONS
  Triptolide has an notable inhibiting effect on proliferation of RA-HFLS and the molecule mechanism is due in part to the direct suppression of abnormal activation of Ras-MAPKs pathway.
authors.affiliation: China Institute of Chinese Materia Medical, China Academy of Chinese Medical Sciences, Beijing 100700, China. bamboo0727@163.com
authors.forename: Jianzhu
authors.initials: J
authors.lastname: Wang
authors.forename: Jinrao
authors.initials: J
authors.lastname: Lian
authors.forename: Xiangying
authors.initials: X
authors.lastname: Kong
authors.forename: Na
authors.initials: N
authors.lastname: Lin
mesh_terms: D000818:Animals; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D004224:Diterpenes / Q000494:pharmacology*; D004852:Epoxy Compounds / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects; D020935:MAP Kinase Signaling System / Q000187:drug effects*; D051379:Mice; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D010616:Phenanthrenes / Q000494:pharmacology*; D013583:Synovial Membrane / Q000166:cytology* / Q000187:drug effects* / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D018631:ras Proteins / Q000378:metabolism*
chemical_list: D004224:Diterpenes; D004852:Epoxy Compounds; D010616:Phenanthrenes; D014409:Tumor Necrosis Factor-alpha; C001899:triptolide; D020928:Mitogen-Activated Protein Kinases; D018631:ras Proteins