title: Interleukin-8 (IL-8) in synovial fluid of rheumatoid and nonrheumatoid joint effusions.
abstract: IL-8 was measured in knee joint synovial fluid of 60 patients with rheumatoid arthritis, 8 with gout, 6 with osteoarthritis and 4 with meniscus lesions. IL-8 could be demonstrated in most SF samples. The highest levels were observed in rheumatoid joint effusions, yet mean levels were not significantly different between the different subgroups (mean +/- SE; RA 1537 +/- 3049 pg/ml, gout 570 +/- 952 pg/ml, OA/ML 178 +/- 188 pg/ml). In RA patients, IL-8 levels could not be related to various serological, clinical or radiological parameters. However, a correlation was observed between SF levels of IL-8 with those of lactate, LDH, beta 2-microglobulin and glucose. These observations suggest that next to the laboratory parameters IL-8 will be a parameter of the activity of the local inflammatory process. The results also demonstrate that IL-8 is not a disease-specific marker of joint inflammation.
authors.affiliation: Department of Internal Medicine, Zuiderziekenhuis, Rotterdam, The Netherlands.
authors.forename: C A
authors.initials: CA
authors.lastname: Verburgh
authors.forename: M H
authors.initials: MH
authors.lastname: Hart
authors.forename: L A
authors.initials: LA
authors.lastname: Aarden
authors.forename: A J
authors.initials: AJ
authors.lastname: Swaak
mesh_terms: D001172:Arthritis, Rheumatoid / Q000097:blood; D006073:Gout / Q000097:blood; D006801:Humans; D016209:Interleukin-8 / Q000032:analysis* / Q000097:blood; D010003:Osteoarthritis / Q000097:blood; D013582:Synovial Fluid / Q000737:chemistry*
chemical_list: D016209:Interleukin-8