Related Experiment Videos
SNOR and wheeze: the asthma enzyme?
Edward M Henderson1, Benjamin Gaston
1Pediatric Respiratory Medicine, University of Virginia Health System, Charlottesville, VA 22908, USA.
Trends in Molecular Medicine
|October 11, 2005
Summary
Asthma may not require airway hyper-responsiveness, challenging traditional definitions. New research suggests airway inflammation
Area of Science:
- Pulmonary Medicine
- Biochemistry
Background:
- Asthma is conventionally defined by airway inflammation and smooth muscle hyper-responsiveness.
- Recent findings challenge this dual requirement, suggesting distinct mechanisms.
- S-nitrosothiol signaling is implicated in human asthma pathophysiology.
Purpose of the Study:
- To investigate the relationship between airway inflammation and hyper-responsiveness in asthma.
- To explore the role of S-nitrosothiol reductase in asthma development.
- To re-evaluate the central mechanisms of asthma.
Main Methods:
- Utilized a mouse model lacking S-nitrosothiol reductase.
- Induced airway inflammation via allergen exposure.
- Assessed airway hyper-responsiveness in the modified mice.
Main Results:
- Mice lacking S-nitrosothiol reductase exhibited allergen-induced airway inflammation.
- These mice did not display airway hyper-responsiveness.
- Clinical data support abnormal S-nitrosothiol signaling in human asthma.
Conclusions:
- Airway inflammation and hyper-responsiveness may be distinct components of asthma.
- Biochemical responses to inflammation, particularly S-nitrosothiol metabolism, are critical to asthma.
- Nitric oxide in exhaled air may be a biomarker for nitrogen oxide metabolism, not directly for asthma severity.