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Turbinate-Specific IgE in Normal and Rhinitic Patients.

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Specific immunoglobulin E (sIgE) in nasal tissue effectively predicts allergic rhinitis. This sensitive diagnostic method identifies sIgE in the nasal mucosa, offering a potential new tool for allergy diagnosis.

Keywords:
allergenallergic rhinitisasymptomaticimmunoglobulin Einferior turbinatelocal allergic rhinitisnasal symptomsreceiver operating curvetissue biopsytissue sIgE

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Area of Science:

  • Allergen immunotherapy and diagnostics
  • Otorhinolaryngology
  • Immunology

Background:

  • Specific immunoglobulin E (sIgE) in nasal airways is a key marker for allergic status.
  • Normative values for nasal sIgE in asymptomatic individuals and those with rhinitis are not well-established.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of inferior turbinate tissue biopsy for sIgE in both asymptomatic and rhinitic patients.
  • To determine the utility of turbinate tissue sIgE as a predictive marker for allergic rhinitis.

Main Methods:

  • A cross-sectional study involving 160 patients undergoing inferior turbinate surgery.
  • Inferior turbinate tissue biopsy analyzed for allergen-specific sIgE (dust mite, grass, animal dander) via automated immunoassay.
  • Receiver operating curve analysis to assess diagnostic performance and establish a positive threshold.

Main Results:

  • A positive threshold for tissue sIgE was established at >0.10 kUA/L, with a median of 0.09 kUA/L in asymptomatic nonatopic patients.
  • Inferior turbinate tissue sIgE demonstrated strong predictive value for allergic rhinitis (AUC: 0.87).
  • The test achieved 90% sensitivity and 89% negative predictive value.

Conclusions:

  • Inferior turbinate tissue biopsy for sIgE is a highly sensitive method for predicting allergic rhinitis.
  • The identified threshold of 0.1 kUA/L aligns with nonatopic individuals, validating its use.
  • This approach of detecting sIgE in nasal mucosa presents a promising future diagnostic tool for allergic rhinitis.