Specific local immunotherapy in nasal allergy (preliminary report)

Area of Science:

• Allergy and Immunology
• Otolaryngology

Background:

• Nasal allergies, particularly to graminacea (grass pollen), significantly impact quality of life.
• Current treatments for allergic rhinitis have limitations, necessitating exploration of alternative therapies like local immunotherapy.

Purpose of the Study:

• To evaluate the clinical efficacy and safety of a specific local immunotherapy administered via nasal spray for graminacea allergy.
• To assess changes in nasal provocation thresholds and serum blocking antibody levels following treatment.

Main Methods:

• A preliminary study involving 23 subjects with graminacea allergy, including a control group of 10.
• Treatment involved a specific local immunotherapy using progressively increasing doses of allergen in an aqueous solution via nasal spray.
• Clinical outcomes were assessed using a clinical diary, nasal provocation tests, and serum antibody levels.

Main Results:

• During the critical phase of pollen exposure, all treated patients were symptom-free, contrasting with the control group.
• A majority of treated subjects showed an increased threshold for nasal provocation and elevated serum levels of blocking antibodies.
• A slight increase in mucociliar clearance time was observed in most treated patients, indicating a potential adverse effect.

Conclusions:

• Specific local immunotherapy in spray form demonstrates significant clinical benefits for graminacea allergy sufferers.
• The treatment appears to enhance immunological tolerance, as evidenced by increased nasal provocation thresholds and blocking antibodies.
• The observed effect on mucociliar clearance warrants careful consideration and management as a potential adverse side effect.