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Aspirin-sensitive rhinitis-associated changes in upper airway innervation.
D A Groneberg1, W Heppt, P Welker
1Dept of Otorhinolaryngology, Karlsruhe Teaching Hospital, University of Freiburg, Karlsruhe, Germany.
The European Respiratory Journal
|December 19, 2003
Summary
Aspirin-sensitive rhinitis involves increased VIP nerve fibers in nasal mucosa. This finding suggests a role for upper airway nerve changes in pseudoallergic reactions to aspirin.
Area of Science:
- Immunology
- Neuroscience
- Otorhinolaryngology
Background:
- Aspirin-sensitive rhinitis is a pseudoallergic reaction in the upper respiratory tract.
- Airway innervation plays a potential immunomodulatory role in inflammatory diseases.
Purpose of the Study:
- To investigate changes in nasal mucosa innervation in aspirin-sensitive rhinitis.
- To compare nerve characteristics between patients and controls.
Main Methods:
- Immunohistochemistry was used to analyze nasal mucosa sections.
- Specific markers included protein gene product 9.5, tachykinins, calcitonin gene-related peptide, vasoactive intestinal peptide (VIP), and neuropeptide tyrosine.
- Neuropeptide-containing nerves were quantified using a scoring system.
Main Results:
- Aspirin-sensitive rhinitis patients showed significantly increased VIP-like immunoreactivity in mucosal nerves compared to controls.
- Eosinophil counts were significantly higher in aspirin-sensitive rhinitis patients.
- Mast cell numbers remained constant between groups.
Conclusions:
- Nasal mucosa innervation differs between individuals with and without aspirin-sensitive rhinitis.
- Increased VIP immunoreactivity suggests a pathophysiological role for upper airway innervation in pseudoallergic responses.