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Immunologic aspects of eosinophilia.

S G Cohen

    New England and Regional Allergy Proceedings
    |January 1, 1985
    PubMed
    Summary

    The eosinophil, often linked to allergies, likely evolved as an early defense against parasites. Its role in immune responses and hypersensitivity continues to be a key area of research.

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    Area of Science:

    • Immunology
    • Evolutionary Biology
    • Allergy Research

    Background:

    • The eosinophil's role in immune function is under investigation.
    • Its association with IgE and mast cells suggests an evolutionary basis in host defense.
    • The development of the atopic state and allergic reactivity is linked to eosinophil involvement.

    Purpose of the Study:

    • To explore the evolutionary origins of eosinophil involvement in immune responses.
    • To understand the connection between eosinophils, hypersensitivity, and allergic phenomena.
    • To investigate the potential dual nature of eosinophil accumulations in health and disease.

    Main Methods:

    • Review of existing investigative data on eosinophil function.
    • Analysis of the evolutionary context of immune responses to parasites and allergens.
    • Correlation of eosinophil activity with hypersensitivity and allergic conditions.

    Main Results:

    • Compelling data suggests eosinophils are integral to immune function, not merely coincidental.
    • Eosinophil actions likely evolved as a defense mechanism against helminth parasites.
    • Genetic predisposition in humans allows for hypersensitivity responses, involving eosinophils, to complex antigens.

    Conclusions:

    • Eosinophils play a significant role in the immune system, with evolutionary roots in parasite defense.
    • The eosinophil is central to understanding allergic reactivity and the atopic state.
    • Further research into eosinophil accumulation is warranted to differentiate benign roles from those in hypersensitivity inflammation.

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