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Monocyte production during inflammation.

R van Furth

    Comparative Immunology, Microbiology and Infectious Diseases
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Resident macrophages originate from monocytes and bone marrow. Acute inflammation increases monocytes, which differentiate into macrophages, with production regulated by inflammation-induced factor (FIM).

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    Area of Science:

    • Immunology
    • Cell Biology
    • Hematology

    Background:

    • Resident macrophages in organs and serous cavities primarily originate from circulating monocytes.
    • A smaller subset of resident macrophages arises from bone marrow-derived immature mononuclear phagocytes that undergo limited division within tissues.

    Purpose of the Study:

    • To investigate the origin and regulation of macrophages during inflammation.
    • To identify factors controlling monocyte production and differentiation.

    Main Methods:

    • Analysis of macrophage origins in non-inflamed and inflamed tissues.
    • Monitoring of circulating monocyte populations during acute inflammation.
    • Identification of regulatory factors involved in monocyte production.

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    Main Results:

    • Circulating monocytes are the main source of resident macrophages.
    • Acute inflammation triggers an increase in circulating monocytes.
    • These monocytes migrate and differentiate into exudate macrophages at inflammatory sites.
    • Monocyte production during inflammation is controlled by a humoral factor, FIM, secreted by macrophages.

    Conclusions:

    • Monocytes are a key source of macrophages in both steady-state and inflammatory conditions.
    • The differentiation of monocytes into macrophages is a critical process during inflammation.
    • Factor, inflammation-induced, monocyte (FIM) plays a crucial role in regulating monocyte production during acute inflammation.