Urinary IP-10, MCP-1, NGAL, Cystatin-C, and KIM-1 Levels in Prenatally Diagnosed Unilateral Hydronephrosis: The Search for an Ideal Biomarker

Abstract

To investigate the urinary interferon gamma-induced protein 10 (IP-10), monocyte chemotactic protein 1 (MCP-1), neutrophil gelatinase-associated lipocalin (NGAL), cystatin-C, and kidney injury molecule-1 (KIM-1) levels in the management of children with prenatally diagnosed unilateral hydronephrosis. Twenty-seven children with antenatally diagnosed hydronephrosis were enrolled into the study. The controls consisted of 9 healthy children (6 boys, 3 girls; mean age: 41.77 ± 5.30 months). Thirteen children (9 boys, 4 girls; mean age: 48.46 ± 21.11 months) underwent pyeloplasty on follow-up; the remaining 14 (13 boys, 1 girl; mean age: 36.57 ± 14.02 months) were followed up after being diagnosed as having nonobstructive dilatation (NOD). The urinary marker levels were measured in the pyeloplasty, the NOD, and the control groups. The preoperative concentrations of IP-10, MCP-1, NGAL, and KIM-1 were significantly higher in the pyeloplasty group than in the control group (P = .024, P = .002, P = .032, P = .001, respectively). The urinary IP-10 and MCP-1 levels were also significantly higher in the pyeloplasty group than in the NOD group (P = .038, P = .037, respectively). There was no significant difference between the pyeloplasty group and the NOD group regarding urinary NGAL and KIM-1. In the pyeloplasty group, urinary marker levels except cystatin-C were significantly decreased in the postoperative period. A decrease in levels of IP-10, MCP-1, NGAL, and KIM-1 after pyeloplasty may be used as a predictor of surgical outcome. Additionally, IP-10 and MCP-1 were superior to NGAL and KIM-1 in predicting who required surgery.