Increased urinary albumin excretion in children from families with Balkan nephropathy.
Balkan nephropathy (BN) has not been described in children. However, some previous studies have revealed abnormalities of the urinary tract in children from families with BN. In the present study, urinary excretion of albumin was studied in 703 healthy children, age 9-13 years, from endemic and non-endemic settlements around the South Morava River. Since BN is an environmentally induced disease, with possible seasonal variation of toxicant(s), children were studied three times a year: spring, autumn, and winter. After a water load of 15 ml/kg body weight, a 3-h urine sample was collected, from 7 to 10 a.m. Albumin excretion in urine was highest in children from families with BN in all three periods investigated. It was significantly different from excretion in children from the city, and in autumn it was also different ( P<0.01) from children in non-endemic families. Correlation analysis of albumin excretion with some urinary markers of tubular nephrotoxicity shows the highest correlation with both beta(2)-microglobulin and N-acetyl-beta-D-glucosaminidase in endemic villages in autumn. If the upper limit of albumin excretion is set at 8.5 mg/mmol creatinine, then in autumn increased albumin excretion was found in 15 of 229 children from endemic settlements and in only 5 of 454 children from non-endemic areas ( P<0.0001). Evidence is presented that in autumn children from families with BN excreted significantly more albumin than those from non-endemic families but living in the same settlements, or from children living outside of the endemic region in the city of Nis.[1]References
- Increased urinary albumin excretion in children from families with Balkan nephropathy. Stefanović, V., Cukuranović, R., Mitić-Zlatković, M., Hall, P.W. Pediatr. Nephrol. (2002) [Pubmed]
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