Inhibition experiments with solid phase mite or epithelia in house dust hypersensitivity

Area of Science:

• Allergy and Immunology
• Environmental Health

Background:

• House dust allergies are common, but the specific allergens responsible are not fully understood.
• Mites are known allergens in house dust, but other components may also contribute to hypersensitivity.

Purpose of the Study:

• To investigate if allergens other than mites, such as cat epithelia, are involved in house dust allergies.
• To determine the role of various allergens in house dust extracts using skin tests and RAST studies.

Main Methods:

• Absorption of patient sera with solid-phase mite or cat epithelia allergens.
• Measurement of IgE antibody removal and RAST inhibition percentages.

Main Results:

• Absorption with mite or cat epithelia significantly reduced IgE antibodies reactive with both specific allergens and house dust extracts.
• RAST inhibition percentages for Dermatophagoides pteronyssinus and house dust ranged from 65% to 94% in mite-allergic patients.
• RAST inhibition percentages for cat epithelia and house dust ranged from 67% to 92% in cat epithelia-allergic patients.

Conclusions:

• House dust is not a single allergen but a complex mixture of various allergens.
• Mites and animal epithelia are significant contributors to house dust hypersensitivity.
• Understanding the diverse allergens in house dust is crucial for accurate diagnosis and effective allergy management.