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  • Title: Increase of interferon-γ inducible CXCL9 and CXCL11 serum levels in patients with active Graves' disease and modulation by methimazole therapy.
    Author: Antonelli A, Ferrari SM, Corrado A, Ferrannini E, Fallahi P.
    Journal: Thyroid; 2013 Nov; 23(11):1461-9. PubMed ID: 23721189.
    Abstract:
    BACKGROUND: Chemokine (C-X-C motif) ligand (CXCL)9 and CXCL11 play an important role in the initial phases of autoimmune thyroiditis (AT); however, their serum levels in patients with Graves' disease (GD) have never been evaluated in relation to thyroid function and treatment. METHODS: To evaluate CXCL9 and CXCL11 serum levels in GD and to relate these parameters to the clinical phenotype, we measured CXCL9 and CXCL11 serum levels in 91 GD patients; 91 AT, 34 nontoxic multinodular goiters (MNGs), 31 toxic nodular goiters (TNGs), respectively; and 91 healthy controls (age- and sex-matched). RESULTS: Mean CXCL9 and CXCL11 levels were higher in GD in comparison with controls, euthyroid AT, MNG, or TNG (p < 0.05, ANOVA; CXCL9: 274 ± 265, 76 ± 33, 132 ± 78, 87 ± 48, and 112 ± 56  pg/mL; CXCL11: 140 ± 92, 64 ± 20, 108 ± 48, 76 ± 33, 91 ± 41 pg/mL, respectively). Hyperthyroid GD patients had significantly higher CXCL9 or CXCL11 than euthyroid or hypothyroid GD patients. GD patients with untreated hyperthyroidism had higher CXCL9 or CXCL11 than hyperthyroid or euthyroid GD patients under methimazole (MMI) treatment. Comparable CXCL9 and CXCL11 levels were observed in newly diagnosed untreated hyperthyroid GD versus untreated patients with relapse of hyperthyroidism after a previous MMI course. CONCLUSIONS: Serum CXCL9 and CXCL11 levels are associated with the active phase of GD both in newly diagnosed and relapsing hyperthyroid patients. The reduction of serum CXCL9 and CXCL11 levels in treated patients with GD may be related to the immunomodulatory effects of MMI.
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