Interleukin-4 downregulates the cyclic tensile stress-induced matrix metalloproteinases-13 and cathepsin b expression by rat normal chondrocytes

Hideyuki Doi, Keiichiro Nishida, Masanori Yorimitsu, Takamitsu Komiyama, Yasutaka Kadota, Tomonori Tetsunaga, Aki Yoshida, Satoshi Kubota, Masaharu Takigawa, Toshifumi Ozaki

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Mechanical stress plays a key role in the pathogenesis of cartilage destruction seen in osteoarthritis (OA). We investigated the effect of cyclic tensile stress (CTS) on the anabolic and catabolic gene expression of rat cultured normal chondrocytes using the Flexercell strain unit. The effects of interleukin (IL)-4, a chondroprotective cytokine, on the changes in gene expression induced by CTS were also investigated. CTS (7% elongation at 0.5 Hz) for 24 h did not affect the expression of aggrecan and type II collagen, whereas CTS significantly upregulated matrix metalloproteinase (MMP)-13 and cathepsin B mRNA expression by chondrocytes. IL-1β expression was also significantly upregulated by CTS up to 12 h. The upregulation of MMP-13 was observed at 3 h, which was earlier than that of IL-1β. Furthermore, pre-treatment with IL-4 (10 ng/ml) suppressed both MMP-13 and cathepsin B induction by mechanical stress, as well as CTS-induced IL-1β expression. Our results suggest that IL-4 might have a therapeutic value in the treatment of OA by downregulation of mechanical stress-induced MMP-13 and cathepsin B expression by chondrocytes. Copyright

Original languageEnglish
Article number7
Pages (from-to)119-126
Number of pages8
JournalActa medica Okayama
Volume62
Issue number2
Publication statusPublished - Apr 2008

Keywords

  • Aggrecanase
  • IL-4
  • MMP
  • Mechanical stress
  • cathepsin B

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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