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© Research
Publication : PloS one

Urinary retinol binding protein is a marker of the extent of interstitial kidney fibrosis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in PloS one - 08 Jan 2014

Pallet N, Chauvet S, Chassé JF, Vincent M, Avillach P, Levi C, Meas-Yedid V, Olivo-Marin JC, Nga-Matsogo D, Beaune P, Thervet E, Karras A

Link to Pubmed [PMID] – 24416268

PLoS ONE 2014;9(1):e84708

Currently, a non-invasive method to estimate the degree of interstitial fibrosis (IF) in chronic kidney disease is not available in routine. The aim of our study was to evaluate the diagnostic performance of the measurement of urinary low molecular weight (LMW) protein concentrations as a method to determine the extent of IF. The urines specimen from 162 consecutive patients who underwent renal biopsy were used in the analysis. Numerical quantification software based on the colorimetric analysis of fibrous areas was used to assess the percentage IF. Total proteinuria, albuminuria, and the urinary levels of retinol binding protein (RBP), alpha1-microglobulin (α1MG), beta 2-microglobulin (β2MG), transferrin, and IgG immunoglobulins were measured. There was a significant correlation between the degree of IF and the RBP/creatinine (creat) ratio (R2: 0.11, p25% of the parenchyma was 95% when using a threshold of 20 mg/g creat. In conclusion, RBP appears to be a quantitative and non-invasive marker for the independent prediction of the extent of kidney IF. Because methods for the measurement of urinary RBP are available in most clinical chemistry departments, RBP measurement is appealing for implementation in the routine care of patients with chronic kidney disease.

http://www.ncbi.nlm.nih.gov/pubmed/24416268