Induction of matrix metalloproteinase-8 in human fibroblasts by basic calcium phosphate and calcium pyrophosphate dihydrate crystals: Effect of phosphocitrate

P. M. Reuben, L. Wenger, M. Cruz, H. S. Cheung

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Although matrix metalloproteinase-8 (MMP-8) was regarded as the exclusive product of the neutrophils, recent studies have shown that it is also expressed in articular chondrocytes, rheumatoid synovial fibroblasts and endothelial cells. Our aim was to determine the expression of MMP-8 in human fibroblasts (HF) by reverse transcription/polymerase chain reaction (RT/PCR), Northern and Western blotting methods and MMP-8 activity assay. We have shown the expression of MMP-8 in HF and its dose-dependent upregulation by basic calcium phosphate (BCP) and calcium pyrophosphate dihydrate (CPPD) crystals which are markers of severe joint degeneration in osteoarthritis. These effects require new protein synthesis and are reversed by phosphocitrate (PC). The results also show that this fibroblast MMP-8 is distinct from the neutrophil MMP-8 and from the fibroblast MMP-1. These results indicate that MMP-8 may play a significant role in the pathogenic effects of the crystals in osteoarthritis.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalConnective Tissue Research
Volume42
Issue number1
DOIs
StatePublished - Jan 1 2001

Keywords

  • BCP
  • CPPD
  • Fibroblast
  • MMP-8
  • PC

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Nephrology
  • Cell Biology
  • Orthopedics and Sports Medicine

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