Expression of cyclooxygenase-1 and -2 in Rheumatoid Arthritis synovium

Young Ho Lee, Seong Jae Choi, Aeree Kim, Chul Hwan Kim, Jong Dae Ji, Gwan Gyu Song

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The aim of this study was to investigate the expression and localization of cyclooxygenase-1 and -2 (COX-1 and COX-2) in synovial tissues from patients with rheumatoid arthritis (RA). Synovial tissues from 9 patients with RA and 5 patients with osteoarthritis (OA) were examined for COX-1 and COX-2 expressions by immunohistochemical staining using 2 polydonal COX-1 and COX-2 antibodies. In RA synovia, synovial lining cells showed intense immunostaining for COX-1, whereas slight to moderate staining was observed in inflammatory cells, stromal fibroblast-like cells and vascular endothelial cells. There was no significant difference in COX-1 expression between RA and OA synovia. The localization of COX-2 expression dearly differed from that of COX-1 expression, being most intense in inflammatory cells. However, there was no difference in COX-1 and COX-2 expressions between RA and OA synovial tissues. Our observations support that inflammatory mechanisms modulated by COX-1 and COX-2 in chronic RA synovium might be similar to those in chronic OA synovium.

Original languageEnglish
Pages (from-to)88-92
Number of pages5
JournalJournal of Korean medical science
Issue number1
Publication statusPublished - 2000 Feb


  • Arthritis, Rheumatoid
  • Prostaglandin-Endoperoxide Synthase
  • Synovial Membrane

ASJC Scopus subject areas

  • Medicine(all)


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