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Updated: Aug 8, 2026
08:17
Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
Published on: August 25, 2017
Pulmonary effects of ozone exposure during exercise: dose-response characteristics
Summary
This study reveals that even low levels of ozone (O3) exposure can cause pulmonary effects in healthy males. Symptoms like coughing and changes in lung function were observed at concentrations below previously established thresholds.
Area of Science:
- Environmental Health
- Pulmonary Medicine
- Toxicology
Background:
- Limited data exist on the pulmonary effects of ozone (O3) at concentrations below 0.27 ppm.
- Previous research has not fully characterized the respiratory impacts of low-level O3 exposure.
Purpose of the Study:
- To investigate the pulmonary effects of controlled ozone exposure at concentrations lower than previously studied.
- To determine the threshold for O3-induced respiratory symptoms and lung function changes in healthy young males.
Main Methods:
- Six groups of healthy young males were exposed to varying O3 concentrations (0.0 to 0.40 ppm) for 2.5 hours.
- Exposure involved alternating rest and exercise periods (65 l/min minute ventilation) for the first 2 hours.
- Pulmonary function tests, including spirometry, and subjective symptoms were assessed.
Main Results:
- Coughing was observed at all tested O3 levels.
- Small changes in forced vital capacity (FVC) and expiratory flow rates occurred at 0.12 and 0.18 ppm O3.
- Significant changes in respiratory mechanics, deep breath pain, and shortness of breath were noted at O3 levels of 0.24 ppm and above.
Conclusions:
- Pulmonary effects of ozone occur at lower concentrations than previously documented.
- Airway receptor stimulation is a likely mechanism for observed effects, with a potential second mechanism suggested.
- These findings highlight the need to reconsider air quality standards for ozone.
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