Pediatric Nephrology

, Volume 27, Issue 5, pp 807–812

NGAL distinguishes steroid sensitivity in idiopathic nephrotic syndrome

  • Michael R. Bennett
  • Nuntawan Piyaphanee
  • Kimberly Czech
  • Mark Mitsnefes
  • Prasad Devarajan
Original Article

DOI: 10.1007/s00467-011-2075-7

Cite this article as:
Bennett, M.R., Piyaphanee, N., Czech, K. et al. Pediatr Nephrol (2012) 27: 807. doi:10.1007/s00467-011-2075-7

Abstract

Background

Idiopathic nephrotic syndrome (NS) is the most common glomerular disorder of childhood. Invasive biopsy remains the diagnostic method of choice for NS. Prognosis correlates with steroid responsiveness, from sensitive (SSNS) to resistant (SRNS). Neutrophil gelatinase-associated lipocalin (NGAL) has been demonstrated to be a powerful risk marker of chronic kidney disease progression. We set out to determine if urine NGAL can distinguish between patients with SRNS, SSNS, and healthy controls.

Methods

Urine and clinical data were collected from patients at Cincinnati Children's Hospital who were recently diagnosed with active nephrotic syndrome as well as healthy controls. Participants included SRNS (n = 15), SSNS (n = 14), and healthy controls (n = 10). Urinary NGAL was measured by ELISA and normalized to creatinine.

Results

Median NGAL was significantly (p < 0.001) higher in SRNS (172.3 ng/ml, IQR 18.8–789) than both SSNS (6.3 ng/ml, IQR 4.9–9.9) and healthy controls (6.5 ng/ml, IQR 4.2–9.1). The area under the curve (AUC) for NGAL to distinguish SRNS from SSNS was 0.91 (p < 0.0001). NGAL levels demonstrated a significant negative correlation with glomerular filtration rate (r = −0.5, p < 0.001). Results did not change with NGAL corrected for urine creatinine and were independent of the degree of proteinuria.

Conclusions

NGAL levels differentiate SSNS from SRNS and correlate with disease severity in SRNS.

Keywords

NGALNephrotic syndromeFSGSMCDBiomarker

Copyright information

© IPNA 2011

Authors and Affiliations

  • Michael R. Bennett
    • 1
  • Nuntawan Piyaphanee
    • 1
  • Kimberly Czech
    • 1
  • Mark Mitsnefes
    • 1
  • Prasad Devarajan
    • 1
  1. 1.Division Nephrology and HypertensionCincinnati Children’s Hospital Medical CenterCincinnatiUSA