Mechanical strain attenuates cytokine-induced ADAMTS9 expression via transient receptor potential vanilloid type 1

Exp Cell Res. 2019 Oct 15;383(2):111556. doi: 10.1016/j.yexcr.2019.111556. Epub 2019 Aug 12.


The synovial fluids of patients with osteoarthritis (OA) contain elevated levels of inflammatory cytokines, which induce the expression of a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) and of the matrix metalloproteinase (MMP) in chondrocytes. Mechanical strain has varying effects on organisms depending on the strength, cycle, and duration of the stressor; however, it is unclear under inflammatory stimulation how mechanical strain act on. Here, we show that mechanical strain attenuates inflammatory cytokine-induced expression of matrix-degrading enzymes. Cyclic tensile strain (CTS), as a mechanical stressor, attenuated interleukin (IL)-1β and tumor necrosis factor (TNF)-α-induced mRNA expression of ADAMTS4, ADAMTS9, and MMP-13 in normal chondrocytes (NHAC-kn) and in a chondrocytic cell line (OUMS-27). This effect was abolished by treating cells with mechano-gated channel inhibitors, such as gadolinium, transient receptor potential (TRP) family inhibitor, ruthenium red, and with pharmacological and small interfering RNA-mediated TRPV1 inhibition. Furthermore, nuclear factor κB (NF-κB) translocation from the cytoplasm to the nucleus resulting from cytokine stimulation was also abolished by CTS. These findings suggest that mechanosensors such as the TRPV protein are potential therapeutic targets in treating OA.

Keywords: ADAMTS; Chondrocyte; Mechanosensor; Osteoarthritis; TRP.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • ADAMTS4 Protein / genetics
  • ADAMTS4 Protein / metabolism
  • ADAMTS9 Protein / genetics*
  • ADAMTS9 Protein / metabolism
  • Cells, Cultured
  • Chondrocytes / drug effects
  • Chondrocytes / metabolism
  • Cytokines / pharmacology*
  • Gene Expression Regulation, Enzymologic / drug effects
  • Humans
  • Inflammation Mediators / pharmacology*
  • Interleukin-1beta / pharmacology
  • Matrix Metalloproteinase 13 / genetics
  • Matrix Metalloproteinase 13 / metabolism
  • NF-kappa B / metabolism
  • Osteoarthritis / genetics
  • Osteoarthritis / metabolism
  • Osteoarthritis / pathology
  • Signal Transduction / drug effects
  • Signal Transduction / genetics
  • Stress, Mechanical*
  • Synovial Fluid / metabolism
  • TRPV Cation Channels / physiology*
  • Tensile Strength / physiology
  • Tumor Necrosis Factor-alpha / pharmacology


  • Cytokines
  • IL1B protein, human
  • Inflammation Mediators
  • Interleukin-1beta
  • NF-kappa B
  • TRPV Cation Channels
  • TRPV1 receptor
  • Tumor Necrosis Factor-alpha
  • ADAMTS9 Protein
  • ADAMTS9 protein, human
  • MMP13 protein, human
  • Matrix Metalloproteinase 13
  • ADAMTS4 Protein
  • ADAMTS4 protein, human