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Aging and serum immunoglobulin E levels, immediate skin tests, RAST.

The Journal of Allergy and Clinical Immunology

Skin Tests, Adult, Aging, Asthma, complications, physiopathology, Child, Epitopes, Female, Histamine, diagnostic use, Adolescent, Humans, Immunoglobulin E, biosynthesis, Male, Middle Aged, Radioallergosorbent Test, Regression Analysis, Rhinitis

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      The changes of the serum IgE levels, specific immediate skin-test responses, and RAST measurements with age were evaluated. A total of 331 unrelated individuals were studied, consisting of 166 subjects with ragweed allergic rhinitis and/or asthma, 67 with idiopathic (intrinsic) asthma, and 98 who appeared in good health with no clinical evidence of atopic diseases. All subjects were evaluated by history and physical examination, intradermal skin testing to the common aeroallergens, measurements of IgE antibody to common aeroallergens with the RAST, and serum IgE levels. Results demonstrated a significant decrease in serum IgE levels with aging in atopic individuals. This decline was exponential in character. In addition, a tendency for RAST and immediate type skin-test responses for selected antigens and histamine to decrease with age was observed.

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