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LC-HRMS Metabolomics for Untargeted Diagnostic Screening in Clinical Laboratories: A Feasibility Study
Bertrand Rochat1, Rayane Mohamed2, Pierre-Edouard Sottas3
1Protein Analysis Facility, Center for Integrative Genomics (CIG), University of Lausanne, CH-1015 Lausanne, Switzerland. bertrand.rochat@chuv.ch.
Untargeted diagnostic screening (UDS) using high-resolution mass spectrometry (HRMS) can identify unexpected compounds in patient samples. This metabolome analysis method shows promise for preliminary diagnosis when standard methods fail.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Clinical Diagnostics
Background:
- High-resolution mass spectrometry (HRMS) enables global metabolome analysis.
- Untargeted diagnostic screening (UDS) compares patient samples to healthy controls.
- Conventional diagnostics may fail to identify rare or unexpected conditions.
Purpose of the Study:
- To evaluate the feasibility and reliability of an untargeted diagnostic screening (UDS) procedure.
- To assess the capability of UDS in detecting xenobiotics and endogenous metabolites.
- To explore UDS as a preliminary diagnostic tool for complex cases.
Main Methods:
- Liquid chromatography (LC)-HRMS full-scan analysis of human serum extracts.
- Unsupervised data treatment and filtering to reduce metabolite complexity.
- Comparison of spiked samples (xenobiotics or endogenous compounds) against control samples.
Main Results:
- The UDS procedure successfully identified spiked xenobiotics and elevated endogenous metabolites in test samples.
- The method demonstrated feasibility and reliability in revealing unexpected compounds.
- Detected compounds were ranked after data filtering.
Conclusions:
- HRMS-based UDS is a viable approach for preliminary diagnostic screening, especially when standard methods are inconclusive.
- UDS can aid in identifying toxicological exposures or altered metabolic states.
- Biomedical interpretation and confirmatory testing are crucial to mitigate overdiagnosis risks.
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