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Specific immune recognition by lymphocytes: an evolutionary perspective.

G W Warr, J J Marchalonis

    The Quarterly Review of Biology
    |September 1, 1978
    PubMed
    Summary
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    Evolution of the lymphocyte.

    Immunology today·2014

    The origins of specific immune recognition by lymphocytes are analyzed. Vertebrate-type lymphocytes are not proven in invertebrates, but all vertebrates possess lymphocytes using membrane-bound immunoglobulins for antigen recognition.

    Area of Science:

    • Immunology
    • Comparative Immunology
    • Evolution of Immune Systems

    Background:

    • Specific immune recognition is crucial for host defense.
    • Lymphocytes are key players in vertebrate adaptive immunity.
    • Understanding the evolutionary origins of immune cells is fundamental.

    Purpose of the Study:

    • To review data on the origins of specific immune recognition by lymphocytes.
    • To consider immune phenomena and cells in invertebrates.
    • To evaluate the presence and function of lymphocytes across vertebrate species.

    Main Methods:

    • Analysis of existing data on invertebrate and vertebrate immunity.
    • Review of anatomical, functional, and physicochemical investigations of lymphocytes.
    • Comparative study of immune recognition mechanisms.

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    Main Results:

    • Evidence for vertebrate-type immunocompetent lymphocytes in invertebrates is not yet proven.
    • All vertebrates possess immunologically competent lymphocytes.
    • Specific antigen recognition by vertebrate lymphocytes is mediated by membrane-bound immunoglobulins, distinct from secreted antibodies but sharing antigen-binding sites.
    • Functional divisions within vertebrate immune systems appear conserved across diverse species.

    Conclusions:

    • Invertebrate immunity likely differs fundamentally from vertebrate adaptive immunity.
    • Membrane-bound immunoglobulins are critical for specific antigen recognition in all vertebrates.
    • The functional organization of vertebrate immune systems shows evolutionary conservation.