Association of kidney fibrosis with urinary peptides: a path towards non-invasive liquid biopsies?

Magalhães, P. et al. (2017) Association of kidney fibrosis with urinary peptides: a path towards non-invasive liquid biopsies? Scientific Reports, 7, 16915. (doi: 10.1038/s41598-017-17083-w) (PMID:29208969) (PMCID:PMC5717105)

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Chronic kidney disease (CKD) is a prevalent cause of morbidity and mortality worldwide. A hallmark of CKD progression is renal fibrosis characterized by excessive accumulation of extracellular matrix (ECM) proteins. In this study, we aimed to investigate the correlation of the urinary proteome classifier CKD273 and individual urinary peptides with the degree of fibrosis. In total, 42 kidney biopsies and urine samples were examined. The percentage of fibrosis per total tissue area was assessed in Masson trichrome stained kidney tissues. The urinary proteome was analysed by capillary electrophoresis coupled to mass spectrometry. CKD273 displayed a significant and positive correlation with the degree of fibrosis (Rho = 0.430, P = 0.0044), while the routinely used parameters (glomerular filtration rate, urine albumin-to-creatinine ratio and urine protein-to-creatinine ratio) did not (Rho = -0.222; -0.137; -0.070 and P = 0.16; 0.39; 0.66, respectively). We identified seven fibrosis-associated peptides displaying a significant and negative correlation with the degree of fibrosis. All peptides were collagen fragments, suggesting that these may be causally related to the observed accumulation of ECM in the kidneys. CKD273 and specific peptides are significantly associated with kidney fibrosis; such an association could not be detected by other biomarkers for CKD. These non-invasive fibrosis-related biomarkers can potentially be implemented in future trials.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Mischak, Professor Harald and Mullen, Dr Bill
Authors: Magalhães, P., Pejchinovski, M., Markoska, K., Banasik, M., Klinger, M., Švec-Billá, D., Rychlík, I., Rroji, M., Restivo, A., Capasso, G., Bob, F., Schiller, A., Ortiz, A., Perez-Gomez, M. V., Cannata, P., Sanchez-Niño, M. D., Naumovic, R., Brkovic, V., Polenakovic, M., Mullen, W., Vlahou, A., Zürbig, P., Pape, L., Ferrario, F., Denis, C., Spasovski, G., Mischak, H., and Schanstra, J. P.
College/School:College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
Journal Name:Scientific Reports
Publisher:Nature Publishing Group
ISSN (Online):2045-2322
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Scientific Reports 7(1):16915
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
669961RENALTRACTShireen DaviesEuropean Commission (EC)642937RI MOLECULAR CELL & SYSTEMS BIOLOGY