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IgE mediated hypersensitivity in ageing.

G Delespesse, J De Maubeuge, B Kennes

    Clinical Allergy
    |March 1, 1977
    PubMed
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    Serum immunoglobulin E (IgE) levels and antibody responses decrease with age, particularly in males. This age-related immune decline may explain fewer atopic symptoms in older adults.

    Area of Science:

    • Immunology
    • Gerontology
    • Allergy Research

    Background:

    • Serum immunoglobulin E (IgE) concentration is a key indicator in allergic and atopic conditions.
    • Age-related changes in immune function are well-documented but specific alterations in IgE response require further investigation.

    Purpose of the Study:

    • To investigate age-related differences in serum IgE levels and specific IgE antibody responses.
    • To explore the functional capacity of mast cells in aged versus young individuals.

    Main Methods:

    • Comparison of serum IgE concentrations between young (<40 years) and aged (>70 years) subjects.
    • Assessment of specific IgE antibody response to diphtheria toxoid injection in both age groups.
    • Intradermal injection of anti-IgE antibody to evaluate weal and flare reactions.

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    Main Results:

    • Significantly lower serum IgE levels were observed in aged individuals compared to young individuals, more pronounced in males.
    • A significantly reduced specific IgE antibody response to diphtheria toxoid was noted in the aged group.
    • While the minimum concentration of anti-IgE to elicit a reaction was similar, the weal reaction diameter was reduced in aged subjects.

    Conclusions:

    • Aging is associated with a decline in both serum IgE levels and specific IgE antibody production.
    • Mast cell reactivity, indicated by weal and flare size, is diminished in aged individuals.
    • Reduced incidence of atopic symptoms in the elderly may be linked to immune system and mast cell anomalies.