Immunoglobulins in nasal secretion with special reference to IgE. I. Methodological studies

Area of Science:

• Immunology
• Allergy Research
• Respiratory Medicine

Background:

• Nasal secretions play a role in respiratory health and immune responses.
• Understanding the composition of nasal secretions is crucial for diagnosing and managing allergic rhinitis.

Purpose of the Study:

• To evaluate methods for collecting physiological nasal secretions.
• To analyze immunoglobulin E (IgE), IgA, IgG, and albumin levels in nasal secretions.
• To investigate changes in nasal secretion composition following provocation in allergic rhinitis patients and healthy controls.

Main Methods:

• Nasal secretions collected using the nasal spray washing method.
• Radioimmunosorbent test (RIST) used for IgE quantification.
• Analysis of IgA, IgG, and albumin concentrations.

Main Results:

• Immunoglobulin E (IgE) quantified in 52/60 secretions; IgA, IgG, and albumin detected in all.
• Allergic rhinitis patients showed increased IgE and albumin, and decreased IgA/albumin ratio post-provocation.
• Healthy subjects exhibited similar changes only after histamine provocation.

Conclusions:

• Nasal provocation alters nasal secretion composition, particularly in allergic rhinitis.
• Findings suggest local IgE production in the nasal mucosa, though less significant than IgA production.