Pediatric Nephrology

, 26:2179

Distinct metalloproteinase excretion patterns in focal segmental glomerulosclerosis

  • Kimberly A. Czech
  • Michael Bennett
  • Prasad Devarajan
Original Article

Abstract

Metalloproteinase-2 (MMP-2) and metalloproteinase-9 (MMP-9) degrade type IV collagen, and represent important tissue remodeling enzymes in several kidney disorders. In this study, we measured urinary levels of MMP-2, MMP-9, and the tissue inhibitors of metalloproteinases (TIMP-1 and TIMP-2) in patients with steroid-sensitive nephrotic syndrome (SSNS, n = 18, median age 5) and focal segmental glomerulosclerosis (FSGS, n = 16, median age 15). We found that urinary concentrations of MMP-2, MMP-9, TIMP-1, and TIMP-2 were significantly elevated in FSGS patients as compared to SSNS in both relapse and remission (p < 0.002). Furthermore, urinary levels of these enzymes are increased early on in the FSGS disease process (chronic kidney disease stages 1 and 2). The findings from this pilot study suggest that MMPs and TIMPs have the potential to represent candidate, early non-invasive biomarkers for diagnosis and/or response to therapy. In addition, they may represent therapeutic targets for preventing chronic kidney disease progression in FSGS.

Keywords

Metalloproteinase Nephrotic syndrome Biomarker Tissue remodeling Chronic kidney disease Urinary proteins 

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Copyright information

© IPNA 2011

Authors and Affiliations

  • Kimberly A. Czech
    • 1
  • Michael Bennett
    • 1
  • Prasad Devarajan
    • 1
  1. 1.Division of Nephrology & HypertensionCincinnati Children’s Hospital and Medical CenterCincinnatiUSA

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