Messenger-RNA expression of matrix metalloproteinases, tissue inhibitors of metalloproteinases, and transcription factors in rheumatic synovial cells under mechanical stimuli

H. B. Sun, H. Yokota

Research output: Contribution to journalArticle

33 Scopus citations


In an effort to elucidate the role of mechanical stimuli in rheumatoid arthritis, we determined mRNA levels of matrix metalloproteinase (MMP)-1, MMP-3, MMP-13, tissue inhibitor of metalloproteinase (TIMP)-1 and TIMP-2, and three transcription factors (c-fos, ets-1, and ets-2) under two mechanical shearing conditions as well as simulated unloading. Human synovial cell cultures (MH7A and RA99-01), derived from rheumatoid arthritis patients, were grown for 1 h under mechanical stimuli and the transcript level was assayed by the reverse transcription-polymerase-chain reaction procedure. First, gentle shearing, estimated at ∼1 dyn/cm2, induced a consistent decrease in mRNA level of MMP-1, MMP-3, MMP-13, and ets-1 and an increase in the transcript level of TIMP-1, TIMP-2, c-fos, and ets-2. Second, intermediate shearing, estimated at ∼6 dyn/cm2, elevated the mRNA level of all MMPs, TIMPs, and the three transcription factors. Third, minimum mRNA level of c-fos, ets-1, and ets-2 was achieved under control conditions at rest, gentle shearing, and simulated unloading, respectively. These in vitro results support a stimulus-dependent transcriptional regulation of MMPs, TIMPs, and transcription factors in cell cultures, suggesting a potential role of shear stress in tissue degradation and prevention in rheumatic joints.

Original languageEnglish (US)
Pages (from-to)303-309
Number of pages7
Issue number3
Publication statusPublished - Mar 15 2001
Externally publishedYes



  • Human synovial cells
  • Matrix metalloproteinase (MMP)
  • Mechanical stimuli
  • Rheumatoid arthritis (RA)
  • Tissue inhibitor of metalloproteinase (TIMP)
  • c-fos
  • ets-1
  • ets-2

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Physiology
  • Histology

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