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The inflammatory theory of asthma
1Department of Medicine, New England Medical Center, Boston, MA 02111.
Immunological Investigations
|October 1, 1987
Summary
Asthma involves initial mast cell activation, releasing mediators causing immediate bronchospasm. Subsequent inflammation and hyperreactivity create a cycle leading to chronic asthma pathology.
Area of Science:
- Immunology
- Pulmonology
- Cell Biology
Background:
- Asthma pathogenesis involves complex cellular and mediator interactions.
- Understanding the sequence of events is crucial for developing targeted therapies.
Purpose of the Study:
- To propose a model for asthma development.
- To differentiate between immediate and late-phase responses in asthma.
Main Methods:
- Observational study detailing cellular activation and mediator release.
- Analysis of IgE-dependent and IgE-independent pathways.
Main Results:
- Initial allergen exposure activates mast cells, releasing mediators for bronchospasm.
- A second set of mediators promotes inflammation via neutrophils and eosinophils.
- Inflammation leads to epithelial damage, hyperreactive airways, and recurrent bronchospasm, forming a cycle.
Conclusions:
- A proposed model highlights a vicious cycle in chronic asthma.
- This cycle involves inflammation, hyperreactivity, and mast cell degranulation.
- The model differentiates transient bronchospasm from chronic asthma pathology.