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ATG5, autophagy and lung function in asthma
Audrey Poon1, David Eidelman, Catherine Laprise
1McGill University Health Centre, Meakins-Christie Laboratories, Montreal, Quebec Canada.
Autophagy
|April 14, 2012
Summary
Autophagy, a cellular process, is linked to asthma development and severity. This study found genetic links and cellular evidence of autophagy in asthma patients, suggesting its role in lung function decline.
Area of Science:
- Cellular Biology
- Respiratory Medicine
- Genetics
Background:
- Reactive oxidative species (ROS) are crucial for cell survival but excessive ROS contributes to asthma pathogenesis.
- Autophagy, a cellular degradation process, is induced by ROS and may play a role in asthma.
Purpose of the Study:
- To investigate the association between autophagy and asthma pathogenesis.
- To detect the presence of autophagy using genetic and histological methods.
Main Methods:
- Genotyping of ATG5 variant rs12212740 in French Canadian and American Caucasian cohorts.
- Histological examination of bronchial biopsy tissues from asthma patients and healthy subjects to detect autophagosomes.
Main Results:
- The ATG5 variant rs12212740 was associated with asthma and lung function (FEV1).
- Autophagosomes were more prevalent in bronchial cells of asthma patients compared to healthy individuals.
- Asthma is linked to a cytokine environment promoting airway remodeling and lung function loss.
Conclusions:
- Autophagy is associated with asthma pathogenesis and may contribute to airway remodeling and reduced lung function.
- Genetic and histological evidence supports autophagy's role in asthma.
- Autophagy might be a therapeutic target for managing asthma.
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