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Neuropeptides modulating macrophage function.

R Peck

    Annals of the New York Academy of Sciences
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Neuroendocrine hormones modulate immune cell function. Specific neuropeptides like substance P enhance macrophage tumor-fighting and infection-defense capabilities, impacting cognitive influences on disease.

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    Area of Science:

    • Neuroimmunology
    • Endocrinology
    • Cellular Immunology

    Background:

    • The neuroendocrine and immune systems interact through shared molecular pathways.
    • Neuroendocrine hormones can influence immune cell activity, including macrophages.

    Purpose of the Study:

    • To investigate the effects of various neuroendocrine hormones on macrophage effector functions.
    • To determine the modulatory roles of specific neuropeptides on macrophage cytotoxicity and microbial defense.

    Main Methods:

    • Macrophage cell cultures were treated with different neuroendocrine hormones.
    • Tumoricidal activity and superoxide ion secretion were measured.
    • Effects were assessed both independently and in combination with recombinant gamma interferon (IFN-gamma).

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    Main Results:

    • Adenocorticotropic hormone (ACTH), somatostatin, and substance P increased macrophage cytotoxicity against tumor cells.
    • ACTH and somatostatin inhibited IFN-gamma-induced tumoricidal activity, while substance P enhanced it.
    • Substance P significantly increased macrophage superoxide ion secretion, indicating enhanced antimicrobial potential.

    Conclusions:

    • Neuroendocrine hormones differentially modulate macrophage functions, impacting both anti-tumor and anti-microbial activities.
    • Substance P exhibits a unique ability to enhance macrophage effector functions, suggesting a role in mediating cognitive influences on infection and neoplasia.