Uncovering Non-Invasive Biomarkers in Paediatric Severe Acute Asthma Using Targeted Exhaled Breath Analysis

Area of Science:

• Pediatric Pulmonology
• Metabolomics
• Biomarker Discovery

Background:

• Severe acute asthma (SAA) in children presents a growing challenge, with increasing pediatric intensive care unit (PICU) admissions.
• The complex pathophysiology of asthma requires further exploration to understand its heterogeneous nature.

Purpose of the Study:

• To evaluate the utility of non-invasive targeted exhaled breath metabolomics for characterizing SAA in children.
• To identify potential biomarkers for early recognition and intervention in pediatric severe asthma.

Main Methods:

• Utilized thermal desorption gas chromatography-mass spectrometry (TD-GC-MS) to analyze breath samples.
• Compared volatile organic compound (VOC) profiles from 17 children with SAA (cases) against 27 children with controlled severe asthma (controls).

Main Results:

• Identified 25 VOCs, with 16 common to both groups.
• Found four VOCs more frequently present and nine VOCs at higher concentrations in children with SAA.
• Longitudinal analysis of 10 cases confirmed the reproducibility of identified VOC biomarkers.

Conclusions:

• Exhaled breath analysis offers valuable insights into the molecular underpinnings of SAA.
• Breath metabolomics holds potential for early detection of severe asthma exacerbations and guiding preventive therapies in children.