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- Title
Serum proteomic profiling in patients with drug-induced liver injury.
- Authors
Bell, L. N.; Vuppalanchi, R.; Watkins, P. B.; Bonkovsky, H. L.; Serrano, J.; Fontana, R. J.; Wang, M.; Rochon, J.; Chalasani, N.
- Abstract
Summary Background Idiosyncratic drug-induced liver injury ( DILI) is a complex disorder that is difficult to predict, diagnose and treat. Aim To describe the global serum proteome of patients with DILI and controls. Methods A label-free, mass spectrometry-based quantitative proteomic approach was used to explore protein expression in serum samples from 74 DILI patients (collected within 14 days of DILI onset) and 40 controls. A longitudinal analysis was conducted in a subset of 21 DILI patients with available 6-month follow-up serum samples. Results Comparison of DILI patients based on pattern, severity and causality assessment of liver injury revealed many differentially expressed priority 1 proteins among groups. Expression of fumarylacetoacetase was correlated with alanine aminotransferase ( ALT; r = 0.237; P = 0.047), aspartate aminotransferase ( AST; r = 0.389; P = 0.001) and alkaline phosphatase ( r = −0.240; P = 0.043), and this was the only protein with significant differential expression when comparing patients with hepatocellular vs. cholestatic or mixed injury. In the longitudinal analysis, expression of 53 priority 1 proteins changed significantly from onset of DILI to 6-month follow-up, and nearly all proteins returned to expression levels comparable to control subjects. Ninety-two serum priority 1 proteins with significant differential expression were identified when comparing the DILI and control groups. Pattern analysis revealed proteins that are components of inflammation, immune system activation and several hepatotoxicity-specific pathways. Apolipoprotein E expression had the greatest power to differentiate DILI patients from controls (89% correct classification; AUROC = 0.97). Conclusion This proteomic analysis identified differentially expressed proteins that are components of pathways previously implicated in the pathogenesis of idiosyncratic drug-induced liver injury.
- Subjects
BLOOD plasma; AMINOTRANSFERASES; ALKALINE phosphatase; HEPATOTOXICOLOGY; BILIARY tract
- Publication
Alimentary Pharmacology & Therapeutics, 2012, Vol 35, Issue 5, p600
- ISSN
0269-2813
- Publication type
Article
- DOI
10.1111/j.1365-2036.2011.04982.x