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Gender and age specific differences in exhaled isoprene levels
Matthias Lechner1, Berthold Moser, David Niederseer
1Department of Hygiene, Microbiology, and Social Medicine, Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Fritz-Pregl-Strasse 3, A-6020 Innsbruck, Austria.
Respiratory Physiology & Neurobiology
|March 3, 2006
Summary
Exhaled breath analysis reveals significant gender and age differences in isoprene levels. Males and older adults exhibit higher concentrations of this volatile organic compound, suggesting potential clinical relevance.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Clinical Diagnostics
Background:
- Volatile organic compounds (VOCs) in human breath are increasingly studied for clinical applications.
- Isoprene is a prominent VOC in exhaled breath, with its physiological roles still under investigation.
Purpose of the Study:
- To investigate gender and age-specific variations in exhaled isoprene levels.
- To assess the clinical relevance of isoprene as a biomarker.
Main Methods:
- Proton-transfer-reaction mass spectrometry (PTR-MS) was used to analyze exhaled breath from 126 participants (66 females, 60 males).
- Participants were categorized into six age groups.
- End-expiratory breath samples were collected under standardized conditions.
Main Results:
- Isoprene levels (m/z 69) were significantly higher in males compared to females (p<0.001).
- Younger adults (19-29 years) showed significantly lower isoprene levels than older adults (p=0.002).
- No significant differences were found for other measured masses.
Conclusions:
- Exhaled isoprene levels exhibit significant gender and age-dependent variations.
- These findings highlight the potential of isoprene as a clinically relevant biomarker, acting as both an indicator and effector molecule.