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Identification and Quantification of Deranged Metabolites in Critically Ill Patients Using NMR-Based Metabolomics
Published on: November 29, 2024
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EBC metabolomics for asthma severity
P Ntontsi1, V Ntzoumanika2, S Loukides1
12nd Respiratory Medicine Department, Attikon University Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece.
Journal of Breath Research
|May 12, 2020
Summary
This study explored using exhaled breath condensate (EBC) metabolomics to differentiate severe asthma from mild-to-moderate cases. While challenging, specific metabolites in EBC showed potential for distinguishing asthma severity, aiding future diagnostics.
Area of Science:
- Biochemistry
- Pulmonology
- Metabolomics
Background:
- Asthma is a complex respiratory disease with varying severity, imposing significant socioeconomic burdens.
- Exhaled Breath Condensate (EBC) offers a non-invasive source of airway lining fluid for analysis.
- Current methods for differentiating asthma severity can be invasive or lack precision.
Purpose of the Study:
- To investigate the potential of EBC metabolomics for discriminating between severe and mild-to-moderate asthma.
- To identify specific metabolites in EBC that can serve as biomarkers for asthma severity.
- To evaluate the utility of Nuclear Magnetic Resonance (NMR) and Ultra-High-Performance Liquid Chromatography-Mass Spectrometry (UHPLC-MS) in EBC analysis.
Main Methods:
- Collected EBC from 36 asthma patients (15 severe, 21 mild-to-moderate).
- Analyzed EBC samples using both NMR and UHPLC-MS techniques.
- Applied Partial Least Squares (PLS) and Orthogonal Partial Least Squares (oPLS) regression models for data analysis.
Main Results:
- UHPLC-MS analysis initially showed no single metabolite sufficient for discrimination.
- A subsequent PLS-regression model identified five metabolites capable of differentiating asthma severity.
- NMR data revealed the amino acid lysine as the sole metabolite distinguishing severe from mild-to-moderate asthma (p=0.04).
Conclusions:
- EBC metabolomics presents promising, albeit preliminary, findings for distinguishing asthma severity subgroups.
- Lysine in EBC is a potential biomarker for differentiating severe asthma.
- Further large-scale, well-designed studies are necessary to validate these findings and improve diagnostic capabilities.
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