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  • Title: Association between the severity of Hashimoto's disease and the functional +874A/T polymorphism in the interferon-gamma gene.
    Author: Ito C, Watanabe M, Okuda N, Watanabe C, Iwatani Y.
    Journal: Endocr J; 2006 Aug; 53(4):473-8. PubMed ID: 16820703.
    Abstract:
    CD8+ CD25+-activated cytotoxic T cells and anti-thyroglobulin antibodies (TgAb) are independently involved in the severity of Hashimoto's disease (HD). Interferon gamma (IFN-gamma) activates cytotoxic T cells. To evaluate the hypothesis that the functional +874A/T polymorphism in the gene encoding IFN-gamma is associated with the severity of HD, we examined the frequencies of this polymorphism in 34 HD patients who developed hypothyroidism (severe HD); 22 untreated, euthyroid HD patients (mild HD); 49 patients with intractable Graves' disease (GD); 16 GD patients in remission; and 57 healthy volunteers. Frequency of the +874T allele, which is associated with high IFN-gamma production, was higher in patients with severe HD than in those with mild HD (odds ratio [OR], 3.5; 95% confidence interval [CI], 1.0-12.4; p = 0.047), but there was no difference in the frequency between GD patients. The difference in the frequency of +874T was observed in the subset of patients with HD negative for TgAb (OR, 8.4; 95% CI, 1.2-57.3; p = 0.029) but not in the subset of patients with HD positive for TgAb. Our data indicate that the +874A/T polymorphism in the IFN-gamma gene is associated with severity of HD.
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