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Aging and serum immunoglobulin E levels, immediate skin tests, RAST
The Journal of Allergy and Clinical Immunology
|December 1, 1981
Summary
Serum immunoglobulin E (IgE) levels and allergy test responses decrease significantly with age in atopic individuals. This age-related decline in allergic markers is exponential.
Area of Science:
- Clinical Immunology
- Allergy and Asthma Research
- Immunological Aging
Background:
- Serum immunoglobulin E (IgE) levels are critical biomarkers in atopic diseases.
- Understanding age-related changes in IgE and allergic responses is essential for clinical management.
- Previous research has not fully elucidated the longitudinal changes in allergic markers across different age groups.
Purpose of the Study:
- To investigate the influence of aging on serum IgE levels.
- To evaluate age-related changes in specific immediate skin-test responses.
- To assess the impact of age on Radioallergosorbent Test (RAST) measurements for common aeroallergens.
Main Methods:
- Study population: 331 individuals (166 allergic rhinitis/asthma, 67 intrinsic asthma, 98 healthy controls).
- Evaluations included: medical history, physical examination, intradermal skin testing, RAST for common aeroallergens, and serum IgE level measurements.
- Statistical analysis focused on correlations between age and measured allergic markers.
Main Results:
- A significant, exponentially characterized decrease in serum IgE levels was observed with increasing age in atopic individuals.
- A trend towards decreased RAST results for specific allergens was noted with aging.
- Immediate type skin-test responses to selected antigens and histamine also showed a tendency to decrease with age.
Conclusions:
- Serum IgE levels and allergic reactivity decline significantly with age in individuals with atopic conditions.
- The observed exponential decline suggests a specific biological aging process affecting allergic sensitization.
- These findings have implications for interpreting allergy test results across the lifespan and understanding immune system changes in aging.
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