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Published on: July 12, 2024
310
Effect of air pollution on asthma
Xiaoying Zhou1, Vanitha Sampath1, Kari C Nadeau1
1Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
Summary
Air pollution exposure increases asthma risk and exacerbations by triggering airway inflammation and epithelial barrier dysfunction. Further research is needed to identify sensitive periods and biomarkers for air pollution-induced asthma.
Area of Science:
- Environmental Health
- Pulmonology
- Immunology
Background:
- Asthma is a chronic airway inflammatory disease.
- Air pollution exposure is linked to increased asthma development and exacerbations.
Purpose of the Study:
- To review recent data on air pollution's impact on asthma development and exacerbation.
- To examine air pollution's effects on asthma pathogenic pathways, including inflammation and epithelial barrier function.
- To explore air pollution's impact on asthma across the lifespan.
Main Methods:
- Literature review of recent studies on air pollution and asthma.
- Analysis of pathogenic pathways involved in asthma, such as type 2 and non-type 2 inflammation.
- Examination of airway epithelial barrier dysfunction and immune cell balance disruption.
Main Results:
- Air pollution promotes TH2 responses and oxidative stress, contributing to asthma exacerbation.
- Air pollution-induced airway epithelial barrier dysfunction enhances type 2 inflammation.
- Disruption of TH17/regulatory T cell balance by air pollutants is linked to asthma exacerbation.
- Air pollution exposure may have cumulative effects, with sensitive periods influencing asthma development.
Conclusions:
- Air pollution significantly impacts asthma development and exacerbation through various inflammatory pathways.
- Understanding sensitive life periods and epigenetic biomarkers is crucial for addressing air pollution-induced asthma.
- Further research is needed to elucidate mechanisms and identify preventative strategies.
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