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Published in: Urolithiasis 1/2023

01-12-2023 | Research

Investigations on melamine-based uric acid kidney stone formation and its prevention by inhibitors

Authors: Ashish P. Pradhane, Ravi N. Methekar, Shailesh G. Agrawal

Published in: Urolithiasis | Issue 1/2023

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Abstract

Melamine (Mel) as a milk powder adulterant came to light in September 2008, when a kidney stone disease (KSD) outbreak struck China. The mechanism of the formation of Mel-associated uric acid (UA) stones is relatively unknown. Therefore, in the present study, Mel's influence was explored at comparatively higher and lower concentrations in artificial urine. The parameter optimization performed when the Mel concentration in artificial urine was low, which revealed that higher pH values and lower UA concentration considerably delayed the induction of UA crystallization. When Mel concentration was increased relative to UA concentration, the induction time of UA crystallization decreased dramatically. At the highest concentration of Mel investigated (at UA–Mel molar ratio 1:1), PXRD analysis and SEM revealed a change in crystalline structure of the samples. Based on FTIR analysis, it was determined that UA–Mel interactions are essentially physical, because no new characteristic bands developed. Two inhibitors, namely tri-potassium citrate (TPC) and 3, 7-dimethylxanthine (DMX), were investigated for their inhibitory action on UA crystallization in the presence of Mel. DMX was observed to be more promising than TPC in delaying the induction of crystallisation and hence inhibiting crystal formation.
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Metadata
Title
Investigations on melamine-based uric acid kidney stone formation and its prevention by inhibitors
Authors
Ashish P. Pradhane
Ravi N. Methekar
Shailesh G. Agrawal
Publication date
01-12-2023
Publisher
Springer Berlin Heidelberg
Published in
Urolithiasis / Issue 1/2023
Print ISSN: 2194-7228
Electronic ISSN: 2194-7236
DOI
https://doi.org/10.1007/s00240-023-01437-3

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