Unlabelled: Fetuin A, 59 kDa protein, produced in the liver is a circulating inhibitor of vascular calcification. The aim of the study was to estimate a concentration of fetuin A in children with renal diseases. Fifty three children were examined: 18 with idiopathic nephrotic syndrome (NS) aged 2.5 to 14.5 years, mean 6.6 +/- 3.6 and 35 with chronic renal failure (CRF) aged 4.5 to 20 years, mean 13.3 +/- 3.9. The control group (K) consisted of 22 healthy children, aged from 6.5 to 17.5 years, mean 10.8 +/- 3.3. In all children serum concentration of fetuin A (ELISA method, BioVendor), calcium (sCa), phosphorus (sP), protein (P), albumin (Alb), total cholesterol (TC) and triglycerides (TG) were measured. The daily protein excretion in children with proteinuria (mg/kg/day) and the serum parathormone (PTH) level in children with CRF were analysed.
Results: The concentration of fetuin A was the lowest in children with NS (78.1 +/- 24.5 ng/ml) and was statistically different (p=0.0003) than in group K (101.4 +/- 11 ng/ml) and group CRF (106.7 +/- 13.7 ng/ml). In group NS significant correlations were found between concentrations of fetuin A and sCa (r=0.62, p<0.01), P (r=0.59, p= 0.01) and Alb (r=0.64, p<0.01) and negative correlations with concentration of TC (r=-0.68, p<0.01) and daily proteinuria (r=-0.79, p<0.001). In groups K and CRF the correlations of fetuin A level and analysed parameters were not found.
Conclusion: Low concentration of fetuin A in children with nephrotic syndrome may be the additional agent to promote the atherogenic lesions.
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