Evidence for GM-CSF receptor expression in synovial tissue. An analysis by semi-quantitative polymerase chain reaction on rheumatoid arthritis and osteoarthritis synovial biopsies

Eur Cytokine Netw. 1994 Jan-Feb;5(1):43-6.


Granulocyte macrophage colony stimulating factor (GM-CSF) is one of the main cytokines involved in tissue damage during rheumatoid arthritis (RA). To investigate the expression of the GM-CSF receptor (GM-CSF-R) in the synovial tissue of osteoarthritic (OA) and RA patients, biopsy specimens were obtained ex vivo during therapeutic arthroscopy. A semi-quantitative polymerase chain reaction (PCR) technique was performed using specific primers for the alpha chain of the GM-CSF-R and for beta-actin. The PCR products were analyzed after slot-blotting and hybridization with specific cDNA probes. Both RA (n = 11) and OA (n = 7) samples were positive. No significant overexpression correlating with the clinical or histological disease status of the patients was observed. In conclusion, GM-CSF-R could be detected in the synovial tissue where it can mediate the effects of this cytokine locally produced during RA inflammation.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Arthritis, Rheumatoid / metabolism*
  • Arthritis, Rheumatoid / pathology
  • Female
  • Granulocyte-Macrophage Colony-Stimulating Factor / physiology
  • Humans
  • Male
  • Middle Aged
  • Osteoarthritis / metabolism*
  • Osteoarthritis / pathology
  • Polymerase Chain Reaction
  • Receptors, Granulocyte-Macrophage Colony-Stimulating Factor / biosynthesis*
  • Receptors, Granulocyte-Macrophage Colony-Stimulating Factor / genetics
  • Synovial Membrane / metabolism*
  • Synovial Membrane / pathology


  • Receptors, Granulocyte-Macrophage Colony-Stimulating Factor
  • Granulocyte-Macrophage Colony-Stimulating Factor