Liquid chromatography tandem mass spectrometry study of urinary nucleosides as potential cancer markers.

Abstract

The aim of this work was a comprehensive analysis of metabolite profiles of nucleosides from biological samples obtained from patients with urogenital cancer disease as well as an interpretation of cancer-related patterns of the analyzed profiles. In our study we proposed a targeted approach that was focused on the simultaneous determination of twelve nucleosides from over a hundred urine samples. For analytes' quantification high performance liquid chromatography technique hyphenated with tripple quadrupole mass spectrometer was applied. The developed method was validated in terms of linearity, precision, accuracy as well as in terms of limit of quantification and limit of detection. The obtained, normalized data set was analyzed using univariate statistical analysis. The achieved results revealed statistically significant (p<0.05) differences between levels of five nucleosides determined in urine samples from cancer patients and healthy volunteers, namely: 6-methyladenosine, inosine, N-2-methylguanosine, 3-methyluridine and N,N-dimethylguanosine. Basing on the putative markers we built the discrimination models using partial least squares discriminant analysis as well as K-nearest neighbor method. The sensitivity and specificity of the markers calculated from the obtained models were in the range of 61.9-88.89% and 27.78-50%, respectively. The proposed procedure can be considered as a holistic approach for metabolites' analysis and includes clinical, analytical and bioinformatics sections.

• Authors: Wiktoria Struck, Danuta Siluk, Arlette Yumba-Mpanga, Marcin Markuszewski, Roman Kaliszan, Michał Jan Markuszewski
• Journal: Journal of chromatography. A (J Chromatogr A) Vol. 1283 Pg. 122-31 (Mar 29 2013) ISSN: 1873-3778 [Electronic] Netherlands
• PMID: 23465127 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2013 Elsevier B.V. All rights reserved.

Chemical References

• Biomarkers, Tumor
• Nucleosides

Topics

• Adult
• Aged
• Aged, 80 and over
• Analysis of Variance
• Biomarkers, Tumor (urine)
• Case-Control Studies
• Chromatography, High Pressure Liquid (methods)
• Female
• Humans
• Male
• Middle Aged
• Neoplasms (urine)
• Nucleosides (urine)
• Principal Component Analysis
• Reproducibility of Results
• Tandem Mass Spectrometry (methods)