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Urinary MCP-1 and RBP: independent predictors of renal outcome in macroalbuminuric diabetic nephropathy

S M Titan1, J M Vieira, W V Dominguez

  • 1Renal Division, Department of Clinical Medicine, Faculty of Medicine, University of São Paulo, São Paulo, Brazil. silviatitan@superig.com.br

Journal of Diabetes and Its Complications
|September 18, 2012
PubMed
Abstract

Insights

Urinary retinol-binding protein (RBP) and MCP-1 show promise as early indicators of chronic kidney disease (CKD) progression in diabetic nephropathy (DN) patients. These biomarkers may help identify individuals at higher risk for adverse kidney outcomes.

Area of Science:

  • Nephrology
  • Endocrinology
  • Biomarker Discovery

Background:

  • Albuminuria is a traditional marker for diabetic nephropathy (DN) and chronic kidney disease (CKD).
  • Emerging evidence suggests limitations of albuminuria as a sole biomarker.
  • Intensive research is underway to identify novel predictive markers for DN and CKD progression.

Purpose of the Study:

  • To investigate the predictive value of urinary retinol-binding protein (RBP) and specific serum/urinary cytokines (TGF-β, MCP-1, VEGF) for adverse outcomes in type 2 diabetic patients with macroalbuminuric DN.
  • To identify independent predictors of CKD progression beyond traditional markers.

Main Methods:

  • Analysis of 56 type 2 diabetic patients with macroalbuminuric DN.
  • Assessment of urinary RBP and serum/urinary TGF-β, MCP-1, and VEGF as predictors.
  • Utilized Cox regression analysis to determine independent predictors of the primary outcome (dialysis, doubling of serum creatinine, or death).

Main Results:

  • Urinary RBP and MCP-1 levels were significantly higher in patients who experienced the primary outcome.
  • Urinary RBP and MCP-1 were identified as significant independent predictors of CKD progression after adjusting for creatinine clearance, proteinuria, and blood pressure.
  • Urinary RBP (OR 11.6) and urinary MCP-1 (OR 11.0) demonstrated strong associations with increased risk.

Conclusions:

  • Urinary RBP and MCP-1 are independent predictors of CKD progression in patients with macroalbuminuric diabetic nephropathy.
  • These findings highlight the potential of urinary RBP and MCP-1 as valuable biomarkers for risk stratification in DN.
  • Further research is warranted to explore the role of these biomarkers in normoalbuminuric and microalbuminuric DN.

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