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Published in: Pediatric Nephrology 10/2013

01-10-2013 | Original Article

The role of urinary TGF-β1, TNF-α, IL-6 and microalbuminuria for monitoring therapy in posterior urethral valves

Authors: Ankur Mandelia, Minu Bajpai, Sandeep Agarwala, Arun K. Gupta, Rakesh Kumar, Abid Ali

Published in: Pediatric Nephrology | Issue 10/2013

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Abstract

Background

Long-term renal deterioration is common in patients with posterior urethral valves (PUV), and early identification of detrimental factors can help in counselling patients as well as in guiding future therapy. The aim of our study was (1) to evaluate urinary transforming growth factor-β1 (TGF-β1), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) levels and microalbuminuria before and after ablation of PUV and (2) to examine the effect of early induction of angiotensin-converting enzyme inhibitors (ACE-I) on renal recovery.

Methods

The study included 30 patients with diagnosed PUV. Urinary cytokines were measured pre-operatively and post-operatively for 1 year. The study group was subdivided into two subgroups at 6 months after surgery. Group 1 included 16 patients whose urinary TGF-β1 level showed a declining trend. Group 2 included 14 patients whose urinary TGF-β1 showed a rising trend or plateaued; these patients were started on ACE-I therapy, which they received for at least 6 months.

Results

Urinary TGF-β1, TNF-α and microalbumin levels were high in patients with PUV. In Group 1 patients, urinary TGF-β1, TNF-α and microalbumin levels fell significantly following valve ablation and continued to decline for 12 months. In Group 2 patients, after an initial fall following valve ablation, urinary TGF-β1, TNF-α and microalbumin showed a continued rise until 6 months post-surgery. After ACE-I therapy, there was 53.43 % fall in urinary TGF-β1, 43.15 % fall in microalbuminuria, 28.57 % improvement in split renal function and 35.80 % improvement in GFR.

Conclusions

Based on our results, urinary TGF-β1, urinary TNF-α and microalbuminuria can be used as biomarkers for the early recognition of ongoing renal damage in patients with PUV. ACE-I plays a role in retarding renal damage in these patients.
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Metadata
Title
The role of urinary TGF-β1, TNF-α, IL-6 and microalbuminuria for monitoring therapy in posterior urethral valves
Authors
Ankur Mandelia
Minu Bajpai
Sandeep Agarwala
Arun K. Gupta
Rakesh Kumar
Abid Ali
Publication date
01-10-2013
Publisher
Springer Berlin Heidelberg
Published in
Pediatric Nephrology / Issue 10/2013
Print ISSN: 0931-041X
Electronic ISSN: 1432-198X
DOI
https://doi.org/10.1007/s00467-013-2506-8

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