Journal
JOURNAL OF PROTEOME RESEARCH
Volume 10, Issue 4, Pages 1828-1836Publisher
AMER CHEMICAL SOC
DOI: 10.1021/pr101096f
Keywords
hepatocellular carcinoma; liver cancer; urinary biomarkers; magnetic resonance spectroscopy
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Funding
- Alan Morement Memorial Fund
- Imperial College London Healthcare Trustees, London, U.K.
- Broad Medical Research Program
- London Clinic, London, U.K.
- Egyptian Government
- Higher Education Funding Council for England (HEFCE)
- British Liver Trust
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The advent of metabonomics has seen a proliferation of biofluid profiling studies of patients with hepatocellular carcinoma. The majority of these studies have been conducted in single indigenous populations making the widespread applicability of candidate metabolite biomarkers difficult. Presented here is a urinary proton nuclear magnetic resonance spectroscopy study of mainly hepatitis C virus infected Egyptian patients with hepatocellular carcinoma, which corroborates findings of a previous study from our group of mainly hepatitis B-infected Nigerian patients with hepatocellular carcinoma. Using multivariate statistical analysis, in the form of orthogonal signal-corrected partial least squared discriminant analysis, the sensitivity and specificity of the technique for distinguishing patients with tumors from healthy controls and patients with cirrhosis was 100%/94% and 81%/71%, respectively. Discriminatory metabolites included glycine, trimethylamine-N-oxide, hippurate, citrate, creatinine, creatine, and carnitine. This metabolic profile bears similarity to profiles identified in the Nigerian cohort of subjects indicative of tumor effects on physiology, energy production, and aberrant chromosomal methylation. This is the first study to identify similarly altered urine metabolic profiles of hepatocellular carcinoma in two etiologically and ethnically distinct populations, suggesting that altered metabolism as a result of tumorogenesis is independent of these two factors.
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