Objective Urine is a promising biomarker source for clinical proteomics *** physiological differences are common in multi-center clinical *** this study,we investigate whether significant differences are present in th...
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Objective Urine is a promising biomarker source for clinical proteomics *** physiological differences are common in multi-center clinical *** this study,we investigate whether significant differences are present in the urinary proteomes of individuals from different regions in *** In this study,morning urine samples were collected from healthy urban residents in three regions of China(Haikou,Xi’an and Xining)and urinary proteins were preserved using a membrane-based method(Urimem).The urine proteomes of 27 normal samples were analyzed using LC-MS/MS and compared among three *** annotation of the differential proteins among the three areas was analyzed using the DAVID online database,and pathway enrichment of the differential urinary proteins was analyzed using *** We identified 1898 proteins from Urimem samples using label-free proteome quantification,of which 56 urine proteins were differentially expressed among the three regions(P<0.05).Hierarchical clustering analysis showed that inter-regional differences caused less significant changes in the urine proteome than intersex *** gender stratification,16 differential proteins were identified in male samples and 84 differential proteins were identified in female *** these differential proteins,several proteins have been previously reported as urinary disease *** Urimem will facilitate urinary protein storage for large-scale urine sample *** differences are a confounding factor influencing the urine proteome and should be considered in future multicenter biomarker studies.
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