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  • Title: Circulating thrombopoietin in systemic sclerosis.
    Author: Ertenli I, Kiraz S, Ertürk H, Haznedaroglu IC, Celik I, Calgüneri M, Kirazli S.
    Journal: J Rheumatol; 1999 Sep; 26(9):1939-41. PubMed ID: 10493673.
    Abstract:
    OBJECTIVE: To investigate circulating thrombopoietin (TPO) concentrations in systemic sclerosis (SSc). METHODS: TPO concentrations were measured by ELISA in serum samples of 13 patients (11 female, 2 male) with diffuse SSc, 15 healthy controls (13 female, 2 male), and 15 patients (13 female, 2 male) with rheumatoid arthritis (RA). Thrombocyte counts of patients with SSc and RA and controls were recorded. RESULTS: Median TPO concentrations were 115 (164) in SSc, 76 (32) in RA, and 62 (34) pg/ml in controls. Median serum TPO concentration in the SSc group was significantly higher than other groups; there was no difference between controls and patients with RA (p<0.001 for both comparisons). Median platelet counts of SSc, RA, and controls were 224+/-58x10(9)/l, 238+/-44x10(9)/l, and 272+/-35x10(9)/l, respectively. There was no correlation between thrombocyte counts and TPO levels in any group. CONCLUSION: We show that patients with SSc have higher serum TPO concentrations compared to healthy controls and patients with RA. It can be hypothesized that TPO mediated release of particular growth factors may participate in the pathogenesis of the fibrotic process of SSc.
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