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Visfatin Levels in Subclinical Hypothyroidism
Authors:Guzin Fidan Yaylali  Sebahat Turgut  Fulya Akin  Seyma Ozkan  Mehmet Tural  Melek Tunc Ata  Can Ozlu  Kamil İsler
Institution:1.Department of Endocrinology and Metabolism, Faculty of Medicine,Pamukkale University,Denizli,Turkey;2.Department of Physiology, Faculty of Medicine,Pamukkale University,Denizli,Turkey;3.Department of Internal Medicine, Faculty of Medicine,Pamukkale University,Denizli,Turkey
Abstract:Alterations in thyroid function are associated with changes in body weight, metabolism, and low-grade inflammation abnormal thyroid function may be associated with disturbances in the production of adipokines also. Although there have been studies showing changes in visfatin levels in thyroid dysfunction, exact relationship between them was still unclear. Our aim was to evaluate serum concentrations of visfatin in patients with subclinical thyroid dysfunction before and after normalization of thyroid function tests. The study included 43 patients (mean age 50.1 ± 10.6 years) with subclinical hypothyroidism. Serum insulin, visfatin, TSH, free T4 (FT4) and free T3 (FT3) levels of subjects were analyzed. Visfatin levels were measured in all patients before starting therapy and after normalization of thyroid function. Serum visfatin levels of subclinical hypothyroid patients were 0.99 ± 0.45 and they were similar after normalization of thyroid function (p = 0.394). Serum visfatin levels were negatively correlated with FT4 levels before treatment (r = ?0.329 p < 0.05). There was no significant correlation between serum levels of visfatin and the serum levels of TSH and FT3. Serum visfatin levels did not correlate with insulin, fasting blood glucose, total cholesterol, HDL cholesterol, LDL cholesterol and triglyceride levels. In this study, it was shown visfatin levels did not change after replacement therapy in patients with subclinical hypothyroidism. Subclinical hypothyroid state may be an earlier stage regarding the changes of adipocytokines specifically the visfatin secretion as seen in overt hypothyroidism.
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