Summary
We sought to investigate the influence of interleukin-10 (IL10) and IL-6 on the acute phase proteins (APP) in systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). IL-10, IL-6, Creative 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.
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Lacki, J.K., Samborski, W. & Mackiewicz, S.H. Interleukin-10 and interleukin-6 in lupus erythematosus and rheumatoid arthritis, correlations with acute phase proteins. Clin Rheumatol 16, 275–278 (1997). https://doi.org/10.1007/BF02238963
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DOI: https://doi.org/10.1007/BF02238963