Histamine and Tryptase in Nasal Secretions After Allergen Challenge
Author Information
Author(s): D. Wang, P. Clement, J. Smitz, M.-P. Derde
Primary Institution: University Hospital, Free University Brussels, Brussels, Belgium
Hypothesis
The study aims to determine the normal and pathological concentrations of histamine and tryptase in nasal secretions after nasal challenge.
Conclusion
Tryptase is a more reliable marker than histamine for monitoring mast cell activation during early nasal allergic reactions.
Supporting Evidence
- Tryptase concentrations were below detection limits in most samples except after allergen challenge.
- Histamine levels significantly increased after both PBS and allergen challenges in the patient group.
- Patients experienced sneezing and nasal obstruction after allergen challenge but not after PBS.
Takeaway
The study looked at how two substances, histamine and tryptase, behave in the noses of people with allergies compared to those without allergies when exposed to allergens.
Methodology
The study used nasal microsuction to collect samples from patients and healthy volunteers after nasal challenges with PBS and allergens.
Limitations
The study did not evaluate the long-term effects of the nasal challenges and relied on a small sample size for some analyses.
Participant Demographics
18 atopic patients (11 males, 7 females) aged 18-45 and 10 healthy volunteers (5 males, 5 females) aged 20-43.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
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