Methimazole upregulates T-cell-derived cytokines without improving the existing Th1/Th2 imbalance in Graves' disease

Journal of Endocrinological Investigation
T KocjanS Hojker

Abstract

There is probably a systemic shift of cytokine production in patients with Graves' disease (GD) toward the Th2 cytokine response. Methimazole (MMI) is the first choice for patients with GD and presumably has some direct immunomodulatory action. The aim of this study was to evaluate the balance shift in Th1/Th2 cytokines in patients with GD after 1 yr of MMI treatment, when compared to the same balance in patients with newly diagnosed GD before treatment and in healthy controls. Peripheral blood mononuclear cells (PBMC) were isolated from 17 healthy volunteers, from 18 patients with newly diagnosed GD before treatment and from 15 euthyroid patients with GD after 1 yr of MMI treatment. The PBMC were activated with ionomycin and phorbol 12-myristate 13-acetate (PMA). The concentrations of Th1/Th2 related cytokines [interferon (IFN)-gamma, interleukin (IL)-12 vs IL-4, IL-10] in the culture supernatants were measured by ELISA. PBMC from patients with GD after treatment produced significantly more IFN-gamma and IL-4 than PBMC from patients with GD before treatment, but there were no significant differences in calculated ratios of Th1 against Th2 cytokines between these two groups. When compared to PBMC from healthy controls, PBMC fro...Continue Reading

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Dec 17, 2009·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Nora M UrquizaEvelina G Ferrer
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