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09:58
A Reversible, Non-invasive Method for Airway Resistance Measurements and Bronchoalveolar Lavage Fluid Sampling in Mice
Published on: April 14, 2010
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Late-phase airway reaction and inflammation
J Dolovich1, F E Hargreave, M Jordana
1Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada.
The Journal of Allergy and Clinical Immunology
|February 1, 1989
Summary
Asthma involves airway hyperresponsiveness linked to inflammation. This study explores how local immune cell activity, particularly mast cells, contributes to airway inflammation and hyperresponsiveness in asthma and allergic rhinitis.
Area of Science:
- Immunology
- Pulmonology
- Cell Biology
Background:
- Late asthmatic response and airway hyperresponsiveness are linked to inflammation.
- Anti-inflammatory treatments can mitigate allergen-induced airway hyperresponsiveness.
- Understanding the inflammatory mechanisms driving airway hyperresponsiveness is crucial for asthma management.
Purpose of the Study:
- To investigate the role of local hematopoietic processes in asthma-related airway hyperresponsiveness.
- To examine the contribution of inflammatory responses to increased smooth muscle responsiveness in asthma.
Main Methods:
- Analysis of mast cell numbers in nasal turbinate mucosa scrapings.
- Quantification of metachromatic cells in bronchoalveolar lavage fluid.
- Examination of nasal polyp tissues for progenitor cells supporting basophil/mast cell growth.
Main Results:
- Higher mast cell counts were observed in allergic rhinitis patients compared to controls.
- A direct correlation exists between metachromatic cell numbers and methacholine-induced airway hyperresponsiveness.
- Evidence suggests the presence of progenitor cells in nasal polyps favoring basophil/mast cell proliferation.
Conclusions:
- Local hematopoietic processes, specifically mast cell involvement, are implicated in airway hyperresponsiveness in asthma and allergic rhinitis.
- Growth factors like interleukins and cytokines may exacerbate chronic airway inflammation.
- Targeting locally generated growth factors presents a potential therapeutic strategy for chronic nasal and bronchial airway inflammation.
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