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Related Experiment Videos

Phagocytic function in Down syndrome--I. Chemotaxis.

R M Barkin, W L Weston, J R Humbert

    Journal of Mental Deficiency Research
    |December 1, 1980
    PubMed
    Summary
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    Individuals with Down syndrome exhibit impaired neutrophil and monocyte chemotaxis, indicating potential defects in host defenses that may explain their increased infection susceptibility.

    Area of Science:

    • Immunology
    • Genetics
    • Cell Biology

    Background:

    • Individuals with Down syndrome (DS) have a higher incidence of infections.
    • Defects in host immune defenses are suspected contributors to this increased susceptibility.

    Purpose of the Study:

    • To investigate phagocytic function by evaluating neutrophil and monocyte chemotaxis in individuals with Down syndrome.
    • To compare chemotactic responses between Down syndrome subjects, institutionalized controls, and non-institutionalized normal individuals.

    Main Methods:

    • Assessed cellular and humoral chemotaxis of neutrophils and monocytes.
    • Studied 14 individuals with Down syndrome, 15 matched institutionalized controls, and a comparison group of non-institutionalized normal adults.

    Main Results:

    Related Experiment Videos

    • Neutrophil chemotaxis was significantly impaired in institutionalized individuals (both DS and controls).
    • Monocyte chemotaxis was lower in institutionalized groups compared to normal controls.
    • Down syndrome subjects showed diminished humoral monocyte chemotactic responses compared to both institutionalized controls and normal subjects.

    Conclusions:

    • Impaired neutrophil and monocyte chemotaxis are evident in individuals with Down syndrome.
    • Humoral monocyte chemotaxis is specifically diminished in Down syndrome, suggesting a potential immune defect contributing to infection risk.