alexa Prognostic significance and diagnosis of proteinuria in renal transplantation.
Nephrology

Nephrology

Journal of Nephrology & Therapeutics

Author(s): Calabuig AS, Guirado L, Ramos D

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Abstract Proteinuria is considered one of the most important prognostic markers of chronic kidney disease progression in native kidneys. In renal-transplanted population, proteinuria presents a high prevalence because early stages and its presence, in higher or lower degrees, have been related to the lower graft survival and a higher risk of death, mainly because of cardiovascular diseases, in renal transplantation. Although there is a good correlation between higher degree proteinuria and histologic findings, histology is not very useful in the study of lower degree proteinuria. In that case, the knowledge of different types of proteins present in urine could be useful to know which type of damage underlies on the graft. Proteomics and different laboratory techniques could be helpful to identify damage markers on different conditions, especially on tubulointerstitial damage, that should have a subtle clinical presentation. Diagnosis of proteinuria in renal transplantation follows the same criteria of general population, actually, and in the last years, some authors have tried to achieve the usefulness of different diagnostic methods such as protein/creatinine ratio or albumin/creatinine ratio in the renal-transplanted population in comparison with 24-hour collected urine diagnostic techniques. Nevertheless, there are no studies about the limit to be considered as "normal" in this population, which shows a reduced nephron mass and a higher risk of developing proteinuria. Recent literature about the prognostic significance of lower degrees of proteinuria on graft and patient survival in this population could be the proof that new studies are needed to establish the normal threshold of proteinuria to be considered in kidney transplantation. Copyright © 2012 Elsevier Inc. All rights reserved. This article was published in Transplant Rev (Orlando) and referenced in Journal of Nephrology & Therapeutics

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