Proteomic candidate biomarkers of drug-induced nephrotoxicity in the rat

Rouse, R., Siwy, J., Mullen, W. , Mischak, H., Metzger, J. and Hanig, J. (2012) Proteomic candidate biomarkers of drug-induced nephrotoxicity in the rat. PLoS ONE, 7(4), e34606. (doi: 10.1371/journal.pone.0034606)

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Improved biomarkers of acute nephrotoxicity are coveted by the drug development industry, regulatory agencies, and clinicians. In an effort to identify such biomarkers, urinary peptide profiles of rats treated with two different nephrotoxins were investigated. 493 marker candidates were defined that showed a significant response to cis-platin comparing a cis-platin treated cohort to controls. Next, urine samples from rats that received three consecutive daily doses of 150 or 300 mg/kg gentamicin were examined. 557 potential biomarkers were initially identified; 108 of these gentamicin-response markers showed a clear temporal response to treatment. 39 of the cisplatin-response markers also displayed a clear response to gentamicin. Of the combined 147 peptides, 101 were similarly regulated by gentamicin or cis-platin and 54 could be identified by tandem mass spectrometry. Most were collagen type I and type III fragments up-regulated in response to gentamicin treatment. Based on these peptides, classification models were generated and validated in a longitudinal study. In agreement with histopathology, the observed changes in classification scores were transient, initiated after the first dose, and generally persistent over a period of 10–20 days before returning to control levels. The data support the hypothesis that gentamicin-induced renal toxicity up-regulates protease activity, resulting in an increase in several specific urinary collagen fragments. Urinary proteomic biomarkers identified here, especially those common to both nephrotoxins, may serve as a valuable tool to investigate potential new drug candidates for the risk of nephrotoxicity.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Mullen, Dr Bill and Mischak, Professor Harald
Authors: Rouse, R., Siwy, J., Mullen, W., Mischak, H., Metzger, J., and Hanig, J.
College/School:College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
Journal Name:PLoS ONE
Publisher:Public Library of Science
Published Online:11 April 2012
Copyright Holders:Copyright © 2012 The Authors
First Published:First published in PLoS ONE 7(4):e34606
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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