Relationship between interleukin-8 and neutrophil adhesion molecules in rheumatoid arthritis

Abstract

To evaluate the role of interleukin-8 (IL-8) on the activation of neutrophils in rheumatoid arthritis (RA), we measured IL-8 and the adhesion molecules, L-selectin (CD62L), CD11b and CD18, on neutrophils in paired peripheral blood and synovial fluid of RA patients. Synovial fluid IL-8 levels were significantly increased compared to peripheral blood. L-selectin was split off and CD 11b and CD18 were upregulated on neutrophils in the synovial fluid. A positive correlation occurred between the IL-8 concentration and CD18 or CD11b densities on neutrophils in the synovial fluid (r=0.75,P <0.005 andr=0.60,P < 0.05, respectively). Peripheral blood neutrophils of the patients were desensitised with IL-8 in vivo, as shown by the significantly lower L-selectin shedding after in vitro IL-8 stimulation: 1.6 times decrease for patients vs 3.2 for controls (P < 0.05). In conclusion, these results add further evidence for the role of IL-8 in the activation of neutrophils in RA.

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Correspondence to W. J. Stevens.

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De Gendt, C.M., De Clerck, L.S., Bridts, C.H. et al. Relationship between interleukin-8 and neutrophil adhesion molecules in rheumatoid arthritis. Rheumatol Int 16, 169–173 (1996). https://doi.org/10.1007/BF01419730

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Keywords

  • Interleukin-8
  • CD 11b
  • CD 18
  • L-selectin
  • rheumatoid arthritis