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    Serum levels of visfatin, resistin and adiponectin in patients with psoriatic arthritis and associations with disease severity
    (Wiley-Blackwell, 2016) Dikbaş, Oğuz; Tosun, Mehmet; Bes, Cemal; Tönük, Şükrü Burak; Akşehirli, Özge Yılmaz; Soy, Mehmet
    Aim: Psoriatic arthritis (PsA) is an inflammatory form of arthritis typically associated with psoriasis and/or psoriatic nail disease. Adipocytokines were once thought to influence development of (only) insulin resistance and diabetes mellitus. However, it is now clear that adipocytokines play important roles in development of the inflammation associated with either autoimmune or auto-inflammatory disorders. In the present study, we measured changes in the serum levels of adiponectin, resistin and visfatin, and the associations of such changes with the extent of disease activity and insulin resistance in PsA patients. Material and methods: A total of 67 subjects (28 with PsA and 39 healthy controls) without hypertension or diabetes mellitus were enrolled. Adiponectin, resistin and visfatin levels, and the extent of insulin resistance (assayed using the homeostasis model [HOMA-IR]), were measured in all subjects. Assessment of PsA disease activity was done with the Disease Activity Index for Psoriatic Arthritis (DAPSA). Results: Psoriatic arthritis patients had considerably higher serum levels of adiponectin, resistin and visfatin than did healthy controls (all P < 0.05). In the logistic regression analysis, the following variables may contribute to complex pathogenesis of PsA: adiponectin (P = 0.001, OR = 3.1, 95% CI = 1.6-6.0), resistin (P = 006, OR = 1.8, 95% CI = 1.2-2.9) and visfatin (P = 0.031, OR = 3.9, 95% CI = 1.1-13.9). In contrast, we have not detected any correlation between DAPSA and adipocytokine serum levels (P > 0.05). Conclusion: There is no correlation between adipocytokines and disease activity. Although serum adiponectin, resistin and visfatin levels are higher in patients with PsA, pathophysiological significance of the result has to be evaluated with more extensive studies.
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    Thyroid autoimmunity in patients with Familial Mediterranean Fever: preliminary results
    (Verduci Publisher, 2013) Dikbaş, Oğuz; Soy, Mehmet; Bes, Cemal; Ankaralı, Handan; Buğdaycı, Güler; Zeyrek, A.
    AIM: We investigated whether there was a significant increase in thyroid autoimmunity in patients with Familial Mediterranean fever (FMF). PATIENTS AND METHODS: In total, 220 patients, consisting of 42 with FMF, 75 with rheumatoid arthritis (RA), and 103 healthy controls, were enrolled. Serum thyroid-stimulating hormone (TSH), free triiodothyronine (fT3), free thyroxine (fT4), and thyroid autoantibodies (anti-thyroid peroxidase and anti-thyroglobulin) were measured in all participants. RESULTS: After adjustment for age, gender, and smoking status, statistically significant differences between serum levels of anti-thyroglobulin antibody, anti-thyroid peroxidase antibody, and fT3 were found between the groups (all p < 0.001). Serum TSH level did not differ between the groups (p > 0.05). The frequency of autoimmune thyroiditis in FMF group is higher than control group. However, this difference did not reached the level of statistical significance (p > 0.05). CONCLUSIONS: Although statistically not significant, thyroid autoimmunity was observed more frequently in patients with FMF than in healthy controls. Thyroid autoantibodies were significantly higher in patients with FMF. Studies with greater number of patients are required for evaluating the frequency of the autoimmune thyroiditis in patients with FMF.