4.6 Review

Epithelial and sensory mechanisms of nasal hyperreactivity

Journal

ALLERGY
Volume 77, Issue 5, Pages 1450-1463

Publisher

WILEY
DOI: 10.1111/all.15259

Keywords

barrier function; mucus secretion; nasal mucosa; sensory nerve; TRP channel

Funding

  1. Research Council of the KU Leuven
  2. Agencia Estatal de Investigacion, Spain
  3. Spanish Ministry of Universities
  4. Generalitat Valenciana
  5. Fonds Wetenschappelijk Onderzoek

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Nasal hyperreactivity is a key feature in upper airway diseases, and can result from impaired barrier function, hypersensitivity to stimuli, and potentiation of efferent systems. The molecular mechanisms underlying hyperreactivity are not yet fully understood, but further research may offer new insights into therapeutics.
Nasal hyperreactivity is a key feature in various phenotypes of upper airway diseases, whereby reactions of the nasal epithelium to diverse chemical and physical stimuli are exacerbated. In this review, we illustrate how nasal hyperreactivity can result from at least three types of mechanisms: (1) impaired barrier function, (2) hypersensitivity to external and endogenous stimuli, and (3) potentiation of efferent systems. We describe the known molecular basis of hyperreactivity related to the functional impairment of epithelial cells and somatosensory innervation, and indicate that the thermal, chemical, and mechanical sensors determining hyperreactivity in humans remain to be identified. We delineate research directions that may provide new insights into nasal hyperreactivity associated with rhinitis/rhinosinusitis pathophysiology and therapeutics. The elucidation of the molecular mechanisms underlying nasal hyperreactivity is essential for the treatment of rhinitis according to the precepts of precision medicine.

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