title: [Effect of Tripterygium Wilfordii Hook T4 monomer on proliferation and interleukin-6 production of synovial fibroblasts of patients with rheumatoid arthritis].
abstract: OBJECTIVE
  Tripterygium Wilfordii Hook multi-glycosides T2 has been wildly used in China in treatment of RA. T4 was abstracted from T2 and was reported much more efficient in anti-inflammatory and immune suppression than T2. This study was to investigate the effect Tripterygium Wilfordii Hook T4 monomer on proliferation and interleukin-6 production of synovial fibroblasts of patients with rheumatoid arthritis.
  
  
  METHODS
  Synovium was obtained from patients with rheumatoid arthritis undergoing synovectomies or joint replacement. Cultures of synovial fibroblasts were established. After 3 generations, cultured synovial fibroblasts were stimulated with IL-1. Then 1.5 ng/ml, 5 ng/ml and 15 ng/ml T4 were added, and synovial fibroblasts were cultured in the presence of T4 for 48 hours. Cell proliferation was assayed using MTT method. IL-6 level of supernatant was measured by ELISA.
  
  
  RESULTS
  Proliferation of synovial fibroblasts was inhibited by T4. The proliferation inhibition effect of T4 was dose dependent and inhibition rate was 5.18%, 10.95% and 21.37%, respectively. And T4 had no effect on IL-6 production by IL-1 stimulated synovial fibroblasts.
  
  
  CONCLUSIONS
  T4 might control the disease activity of RA by inhibiting the proliferation of synoviocyte. And T4 might not influence the concentration of IL-6 in synovial fluid, as a central effect, since IL-6 has protective effect on articular cartilage.
authors.affiliation: Department of Clinical Immunology and Rheumatology, PUMC Hospital, CAMS, PUMC, Beijing 100730, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
authors.forename: M
authors.initials: M
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Jiang
authors.forename: Q
authors.initials: Q
authors.lastname: Song
authors.forename: Y
authors.initials: Y
authors.lastname: Dong
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D001172:Arthritis, Rheumatoid / Q000473:pathology*; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D004224:Diterpenes / Q000494:pharmacology*; D004336:Drug Antagonism; D005260:Female; D005347:Fibroblasts / Q000378:metabolism*; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology; D015850:Interleukin-6 / Q000096:biosynthesis*; D008297:Male; D008875:Middle Aged; D010616:Phenanthrenes / Q000494:pharmacology*; D013583:Synovial Membrane / Q000166:cytology*; D029757:Tripterygium / Q000737:chemistry*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D004224:Diterpenes; D007375:Interleukin-1; D015850:Interleukin-6; D010616:Phenanthrenes; C068051:tripchlorolide