Abstract

Objectives We investigated whether plasma visfatin and binding protein-4 (RBP-4) levels correlate with obesity and type 2 diabetes mellitus (T2DM). Design and methods Two groups were enrolled: Group 1: 40 patients with T2DM and Group 2: 40 age- and gender-matched healthy controls. Both groups were subdivided according to body mass index (BMI) into non-obese (BMI < 25 kg/m 2) and obese subjects (BMI ≥ 30 kg/m 2) (20 each). Results Plasma visfatin and RBP-4 levels were significantly increased in T2DM patients compared with controls with similar BMI values (for both p < 0.001). Plasma visfatin and RBP-4 concentrations correlated with BMI, waist/hip ratio, insulin and homeostatic model assessment insulin resistance (HOMA IR). Visfatin and RBP-4 correlated with visceral fat and liver fat in diabetic patients (for both p < 0.001). Conclusion Visfatin level was increased in T2DM, possibly related to hyperglycemia. Plasma RBP-4 correlated positively with liver fat and HOMA IR which may reflect its effects on hepatic insulin sensitivity.

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