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Related Experiment Videos

Mononuclear phagocytes in the human placenta

G W Wood

    Placenta
    |April 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Hofbauer cells, a type of mononuclear phagocyte, are more numerous in human placentae than previously thought. These cells play a crucial role throughout gestation, acting as the differentiated end-stage of a large placental immune cell population.

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    Area of Science:

    • Reproductive Biology
    • Immunology
    • Cell Biology

    Background:

    • Hofbauer cells in human placentae were traditionally identified by morphology and considered mononuclear phagocytes.
    • Previous studies noted morphological heterogeneity and identification difficulties, suggesting underestimation of their numbers.
    • The placenta hosts a significant population of immune cells crucial for pregnancy maintenance.

    Purpose of the Study:

    • To identify and quantify mononuclear phagocytes in the human placenta using specific markers.
    • To characterize the phenotype and distribution of these cells throughout gestation.
    • To clarify the relationship between Hofbauer cells and the broader placental mononuclear phagocyte population.

    Main Methods:

    • Utilized specific cell markers to identify and quantify mononuclear phagocytes in placental cell suspensions.

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  • Assessed Fc receptors, C3 receptors, and alpha-naphthyl butyrate esterase activity.
  • Visualized immune complex receptors in chorionic villi stroma.

    • Main Results:

    • Approximately 65% of placental cells exhibited Fc receptors and resembled mononuclear phagocytes.
    • Most of these cells were phagocytic and expressed C3 receptors.
    • Nearly all cells in the chorionic villi stroma expressed alpha-naphthyl butyrate esterase and immune complex receptors.

    Conclusions:

    • Hofbauer cells represent the mature, identifiable end-stage of a substantial mononuclear phagocyte population in the placenta.
    • This large population of mononuclear phagocytes is present throughout gestation.
    • The findings suggest a more significant role for these cells in placental function than previously recognized.