Serum concentrations of fetuin B in lipodystrophic patients.

OBJECTIVE: Fetuin B is an adipokine/hepatokine which is significantly elevated in insulin resistance/type 2 diabetes mellitus and hepatic steatosis. Regulation of fetuin B in patients with lipodystrophy (LD) - a disease group which is characterized by subcutaneous adipose tissue loss, hypertriglyceridemia, hepatic steatosis, insulin resistance, and dysregulation of several adipokines - has not been elucidated so far. MATERIAL AND METHODS: Serum fetuin B levels were determined in 37 patients with LD, as well as in a control cohort consisting of 37 non-LD participants matched for age, gender, and body mass index. Furthermore, fetuin B was correlated with parameters of lipid metabolism, glucose control, renal function, and inflammation. RESULTS: Median fetuin B serum levels were not significantly different between patients with LD (2980.7 µg/l; interquartile range: 841.7 µg/l) and non-LD controls (2647.3 µg/l; interquartile range: 923.6 µg/l; p = .105). Fetuin B was associated with age, body mass index, markers of renal function, and C reactive protein (CRP) in univariate correlation analyses. The associations with age and creatinine remained significant in multiple linear regression analysis. CONCLUSIONS: Fetuin B serum concentrations are not significantly different between patients with LD and non-LD controls. Fetuin B does not seem to be a major pathogenetic factor in LD.