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  • Title: High values of CXCL10 serum levels in mixed cryoglobulinemia associated with hepatitis C infection.
    Author: Antonelli A, Ferri C, Fallahi P, Ferrari SM, Sebastiani M, Ferrari D, Giunti M, Frascerra S, Tolari S, Franzoni F, Galetta F, Marchi S, Ferrannini E.
    Journal: Am J Gastroenterol; 2008 Oct; 103(10):2488-94. PubMed ID: 18775023.
    Abstract:
    OBJECTIVES: No study has evaluated circulating CXCL10 in patients with mixed cryoglobulinemia (MC) and hepatitis C virus (HCV) chronic infection. The aim of this study is to measure inteferon-inducible protein 10 (CXCL10/IP-10), interferon-gamma (IFN-gamma), and tumor necrosis factor alpha (TNF-alpha) (Th1 cytokines) in a series of cryoglobulinemic patients and to correlate this parameter to the clinical phenotype. METHODS: Serum CXCL10, IFN-gamma, and TNF-alpha were assayed in 102 patients with hepatitis C-associated cryoglobulinemia (MC + HCV), in 102 sex- and age-matched patients with type C chronic hepatitis without cryoglobulinemia (HCV+), and in 102 sex- and age-matched controls. RESULTS: Cryoglobulinemic patients showed significantly higher mean CXCL10 serum levels than controls (P < 0.0001) or HCV+ patients (P < 0.0001) (397 +/- 132 pg/mL, 92 +/- 53 pg/mL, 280 +/- 149 pg/mL, respectively). Moreover, CXCL10 was significantly increased in 30 cryoglobulinemic patients with active vasculitis compared to those without it (460 +/- 104 pg/mL vs 369 +/- 139 pg/mL, respectively; P < 0.001). Both groups of MC + HCV patients with or without active vasculitis had serum CXCL10 significantly higher than HCV+ patients (P < 0.001, P= 0.02, respectively). IFN-gamma levels were not significantly different in MC + HCV than in HCV+ patients or controls. Serum TNF-alpha levels were significantly higher in MC + HCV than in HCV+ patients or controls (median [interquartile range]: 12.0 [9.8], 5.7 [5.4], 1.3 [2.1] pg/mL, respectively; P < 0.0001). CONCLUSIONS: The study demonstrates high CXCL10 and TNF-alpha serum levels in patients with hepatitis C-associated cryoglobulinemia. Moreover, in MC + HCV patients, increased CXCL10 levels were significantly associated with the presence of active vasculitis.
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