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[Environment and nasal hyperreactivity].

J S Lacroix¹

¹Unité de rhinologie, Clinique ORL, Hôpital cantonal universitaire, Genève.

Revue Medicale De La Suisse Romande

|September 18, 1999

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Sensory nerve fibers in the nasal mucosa release neuropeptides that influence protective reflexes and airway inflammation. These neuropeptides are implicated in nasal hyperreactivity, including allergic responses.

Area of Science:

Neuroscience
Immunology
Respiratory Medicine

Background:

The nasal mucosa protects lower airways via sensory nerve-mediated reflexes.
Airborne irritants trigger reflexes like sneezing and nasal congestion.
Nasal mucosa function is modulated by neuropeptides released from sensory nerves.

Purpose of the Study:

To investigate the role of sensory neuropeptides in nasal mucosa function.
To explore the involvement of neuropeptides in nasal hyperreactivity and inflammation.

Main Methods:

Analysis of sensory nerve innervation in the nasal mucosa.
Investigation of neuropeptide release mechanisms.
Assessment of neuropeptide effects on vascular permeability and inflammatory cell recruitment.

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Main Results:

Sensory neuropeptides mediate local vasodilation, vascular permeability, and mucus secretion.
Neuropeptides attract inflammatory cells like eosinophils and granulocytes.
Evidence suggests neuropeptide involvement in allergic and non-specific nasal hyperreactivity.

Conclusions:

Sensory neuropeptides are key players in nasal mucosal defense and inflammatory responses.
Neuropeptides contribute significantly to the pathophysiology of nasal hyperreactivity.
Targeting sensory neuropeptides may offer therapeutic strategies for nasal allergies and hyperreactivity.