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Related Experiment Videos

[Function of breast milk macrophages].

C P Speer, R Schatz, M Gahr

    Monatsschrift Kinderheilkunde : Organ Der Deutschen Gesellschaft Fur Kinderheilkunde
    |November 1, 1985
    PubMed
    Summary

    Human milk macrophages exhibit reduced adherence and chemotaxis but maintain potent oxidative burst capacity. Bacterial endotoxin (LPS) can restore their function, suggesting a role in protecting neonates from infection.

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    Necrotizing enterocolitis after intravitreal bevacizumab in an infant with Incontinentia Pigmenti - a case report.

    BMC pediatrics·2019

    Area of Science:

    • Immunology
    • Neonatal Biology
    • Cellular Microbiology

    Context:

    • Human milk contains viable immune cells, primarily macrophages, crucial for infant health.
    • Milk macrophages play a role in host defense against microbial pathogens.
    • Understanding milk macrophage function is key to neonatal immunity.

    Purpose:

    • To investigate the phagocytic functions of human milk macrophages, including adherence, chemotaxis, and oxidative metabolism.
    • To compare milk macrophage functions with those of blood monocytes.
    • To explore factors influencing milk macrophage activity, such as endotoxin.

    Summary:

    • Milk macrophages showed decreased adherence and chemotaxis compared to blood monocytes.
    • However, milk macrophages exhibited comparable phagocytosis-associated oxidative burst (O2-, H2O2) production after stimulation.
    • In vitro culture led to loss of oxidative metabolism, partially restored by bacterial lipopolysaccharide (endotoxin).

    Impact:

    • Milk macrophages possess significant bactericidal potential through oxygen metabolite release.
    • Endotoxin may prime milk macrophages, enhancing their protective role in neonates.
    • These findings highlight the importance of milk macrophages in neonatal immune defense against infections.

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