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Murine malaria: cellular interactions in the immune response.

G T Strickland, A Ahmed, P C Sayles

    The American Journal of Tropical Medicine and Hygiene
    |November 1, 1983
    PubMed
    Summary

    Immune macrophages, T cells, and B cells are crucial for protective immunity against Plasmodium yoelii malaria. These cells must work together to effectively transfer immunity in mouse models.

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    Area of Science:

    • Immunology
    • Parasitology
    • Malariology

    Background:

    • Cellular and humoral interactions are key to protective immunity in Plasmodium yoelii malaria.
    • Understanding these interactions is vital for developing effective malaria control strategies.

    Purpose of the Study:

    • To investigate the specific cellular and humoral components responsible for protective immunity in Plasmodium yoelii malaria.
    • To elucidate the roles of macrophages, T lymphocytes, and B lymphocytes in adoptive transfer of immunity.

    Main Methods:

    • Adoptive transfer of selective cell populations and hyperimmune serum into sublethally irradiated C57BL/6 mice.
    • Depletion of T or B lymphocytes from spleen cell populations.
    • Inactivation of silica-uptake cells (macrophages) using standard procedures.

    Main Results:

    • Unfractionated immune spleen cells, but not nonimmune cells, conferred protection against lethal P. yoelii challenge.
    • Immune macrophages, T cells, and B cells acting together were essential for optimal transferred immunity.
    • Immune macrophages were required and could not be replaced by nonimmune mononuclear cells.

    Conclusions:

    • A radioresistant, silica-inactivated, non-T, non-B cell, likely a macrophage, collaborates with immune T and B lymphocytes.
    • This collaborative action is necessary for the optimal expression of transferred immunity against Plasmodium yoelii malaria.

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