title: Interleukin-10 and interleukin-6 in lupus erythematosus and rheumatoid arthritis, correlations with acute phase proteins.
abstract: We sought to investigate the influence of interleukin-10 (IL-10) and IL-6 on the acute phase proteins (APP) in systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). IL-10, IL-6, Creactive protein (CRP), alpha-1-acid glycoprotein (AGP), and alpha1 antichymotrypsin (ACT) serum levels were determined in one hundred-eight patients (71 with SLE, 37 with RA). Quantification of the serum IL-10 level showed increased levels in SLE and RA patients as compared to healthy controls. Serum IL-6 level was found to be elevated in SLE and RA patients. A correlation between IL-10 and IL-6 serum level was found only in SLE. CRP and AGP serum levels were increased in RA as compared to controls, whereas in SLE only AGP was found elevated. A statistically significant correlation between IL-6 serum level and CRP, AGP and ACT was found only in RA. No correlation between IL-10 and serum level of CRP, AGP and ACT was established. Since IL-10 has a potent immunosuppressive activity, we expected it to be negatively correlated with APP levels. Surprisingly, IL-10 did not correlate with APP either in SLE or RA patients. However, the elevation of IL-10 serum levels in SLE and RA and the correlation between IL-10 and IL-6 in SLE may suggest that IL-10 may play a central role in inflammatory connective tissue diseases.
authors.affiliation: Department of Rheumatology, Karol Marcinkowski University School of Medical Sciences, Winogrady, Poland.
authors.forename: J K
authors.initials: JK
authors.lastname: Lacki
authors.forename: W
authors.initials: W
authors.lastname: Samborski
authors.forename: S H
authors.initials: SH
authors.lastname: Mackiewicz
mesh_terms: D000209:Acute-Phase Proteins / Q000096:biosynthesis* / Q000276:immunology; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000150:complications / Q000276:immunology*; D015415:Biomarkers / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D016753:Interleukin-10 / Q000096:biosynthesis / Q000097:blood*; D015850:Interleukin-6 / Q000096:biosynthesis / Q000097:blood*; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012680:Sensitivity and Specificity
chemical_list: D000209:Acute-Phase Proteins; D015415:Biomarkers; D015850:Interleukin-6; D016753:Interleukin-10