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  • Title: Favorable role of interleukin 10 in patients with polymyalgia rheumatica.
    Author: Straub RH, Herfarth HH, Rinkes B, Konecna L, Glück T, von Landenberg P, Georgi J, Helmke K, Schölmerich J, Vaith P, Lang B.
    Journal: J Rheumatol; 1999 Jun; 26(6):1318-25. PubMed ID: 10381050.
    Abstract:
    OBJECTIVE: To determine the relationship between the antiinflammatory molecule interleukin 10 (IL-10) and disease symptoms, IL-1beta, tumor necrosis factor (TNF), and IL-1 receptor antagonist (IL-1ra) in patients with polymyalgia rheumatica (PMR). METHODS: In 102 patients with PMR, we determined the severity of the disease by the presence of typical clinical symptoms (symptom score with a maximum of 10 points). IL-10, IL-1beta, TNF, and IL-1ra were measured in all patients and 31 age matched healthy controls by enzyme immunometric assays. RESULTS: Compared to patients with elevated serum levels, patients with normal serum levels of IL-10 (below the mean + 3 SD of controls, 7.79 pg/ml) more often had adynamia (p = 0.045), bilateral muscular pain in shoulders, upper arms or neck (p = 0.045), bilateral muscular pain in the pelvic girdle (p < 0.001), headache (p = 0.014), morning stiffness (p < 0.001), symptoms of depression (p = 0.013), and initial weight loss (p = 0.011), and had a higher symptom score (5.5+/-0.4 vs 3.7+/-0.3; p < 0.001). The overall symptom score correlated negatively with IL-10 serum levels (Rrank = -0.421, p < 0.001). IL-10 correlated negatively with IL-1beta (p = 0.013) and TNF-alpha (p = 0.039). The association between elevated serum levels of IL-10 and low serum levels of IL-1beta and TNF was observed only in patients with corticosteroid treatment. In these patients, elevated serum levels of IL-10 were positively associated with an increased ratio of IL-1ra to IL-1beta. CONCLUSION: Elevated serum levels of IL-10 were associated with a more mild form of PMR. This study indicates a favorable role of IL-10 in patients with PMR.
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