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Related Experiment Videos

Prostaglandins as regulators in cellular immunity

M A Bray, D Gordon, J Morley

    Prostaglandins and Medicine
    |September 1, 1978
    PubMed
    Summary
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    Macrophages produce prostaglandins (PGE) that regulate immune responses. This study suggests PGE production by macrophages is a key mechanism controlling lymphocyte activation in delayed hypersensitivity reactions.

    Area of Science:

    • Immunology
    • Cell Biology
    • Prostaglandin Research

    Background:

    • Guinea-pig peritoneal macrophages produce significant E-type prostaglandins (PGE) in vitro.
    • Lymphokine preparations stimulate PGE production in macrophages.
    • Exogenous PGE1 and PGE2 inhibit lymphocyte activation and lymphokine secretion.

    Purpose of the Study:

    • To investigate the role of macrophage-derived PGE in regulating lymphocyte activation.
    • To explore the connection between PGE production and delayed hypersensitivity reactions.

    Main Methods:

    • In vitro culture of guinea-pig peritoneal macrophages.
    • Use of partially purified lymphokine preparations.
    • Administration of exogenous PGE1 and PGE2.
    • Treatment with indomethacin.

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    Main Results:

    • Macrophage cultures generated substantial PGE concentrations.
    • Lymphokines stimulated PGE production.
    • PGE1 and PGE2 potently inhibited lymphocyte activation and lymphokine secretion.
    • Indomethacin augmented lymphokine secretion.

    Conclusions:

    • Macrophage-derived PGE production is a physiological mechanism for regulating lymphocyte activation.
    • This mechanism is likely involved in delayed hypersensitivity reactions.