Intranasal Aspergillus fumigatus exposure induces eosinophilic inflammation and olfactory sensory neuron cell death in mice

Victoria A. Epstein, Paul J. Bryce, David B. Conley, Robert C. Kern, Alan M. Robinson*

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Objective: To determine the effects of eosinophilic inflammation on olfactory sensory neuron cell death. Study Design: Mice were sensitized to intranasal Aspergillus fumigatus extract and subsequently challenged acutely or chronically with the same allergen. The olfactory neuroepithelium was assessed for immunohistochemical evidence of apoptosis and inflammation. Results: Sensitized mice challenged with allergen demonstrated elevated eosinophil infiltration of the respiratory and olfactory mucosae, with olfactory sensory neuron apoptosis. Remarkably, massive neuronal apoptosis without eosinophil infiltration occurred in nonsensitized mice after a single dose of extract. Conclusion: Intranasal sensitization with A fumigatus results in a model with multifactorial effects. Protocols using A fumigatus to induce allergic rhinitis may need modification to allow confident interpretation. Significance: Fungal allergens may contribute to anosmia through the induction of olfactory sensory neuron apoptosis, with and without prior sensitization.

Original languageEnglish (US)
Pages (from-to)334-339
Number of pages6
JournalOtolaryngology - Head and Neck Surgery
Volume138
Issue number3
DOIs
StatePublished - Mar 1 2008

ASJC Scopus subject areas

  • Surgery
  • Otorhinolaryngology

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