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Updated: Aug 6, 2026
An Air-liquid Interface Bronchial Epithelial Model for Realistic, Repeated Inhalation Exposure to Airborne Particles for Toxicity Testing
Published on: May 13, 2020
Linking ambient fire emissions to respiratory effects using gelatin filter sampling
Olivia C G Lampe1, Tate J Matthews1, Akshat Verma2
1Department of Environmental and Occupational Health, Texas A&M University, College Station, TX 77843, USA; Interdisciplinary Program of Toxicology, Texas A&M University, College Station, TX 77807 USA.
Air pollution from a Texas chemical fire contained higher volatile organic compounds (VOCs) and metals near the site. Exposure to these pollutants upregulated oxidative stress genes in human lung cells, showing real-world air mixtures induce biological responses.
Area of Science:
- Environmental Chemistry
- Toxicology
- Air Quality Monitoring
Background:
- Chemical plant fires can release complex mixtures of airborne pollutants.
- Assessing the biological impact of short-term exposure to real-world pollution is crucial.
Purpose of the Study:
- To investigate air quality and biological effects following a chemical plant fire.
- To evaluate a novel air sampling method integrated with in vitro toxicity testing.
Main Methods:
- Ambient air monitoring using gelatin filters and proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS).
- Targeted and non-targeted analysis (NTA) of volatile organic compounds (VOCs).
- Trace metal analysis and in vitro exposure of human bronchial epithelial cells to filter extracts.
Main Results:
- Elevated concentrations of specific VOCs (benzene, toluene, ethylbenzene/xylenes) and unique VOCs were detected near the incident site post-fire.
- Filters from the incident site showed higher burdens of various trace metals, including barium, thulium, and samarium.
- Exposure to incident site filter extracts significantly upregulated the oxidative stress gene HMOX1 in human bronchial epithelial cells.
Conclusions:
- Short-term exposure to real-world air pollutant mixtures from an industrial fire induces biological responses in airway cells.
- The integrated approach using novel sampling and in vitro assessment is effective for evaluating episodic emission events.
- Findings highlight the potential health risks associated with acute exposure to complex industrial air pollution.
