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Related Experiment Videos

Circulating IgE levels in a normal human population

A L Barsoum, E K Kuwert

    Zeitschrift Fur Immunitatsforschung. Immunobiology
    |February 1, 1977
    PubMed
    Summary

    This study reveals that normal population immunoglobulin E (IgE) levels exhibit a multimodal distribution, not a Gaussian one. Genetic analysis suggests allele frequencies aligning with atopic and non-atopic traits.

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    Area of Science:

    • Immunology
    • Genetics
    • Population Health

    Background:

    • Immunoglobulin E (IgE) is crucial in allergic responses.
    • Understanding normal IgE level distribution is key for diagnostics.
    • Previous studies often assumed Gaussian distribution for IgE levels.

    Purpose of the Study:

    • To investigate the distribution of circulating IgE levels in a non-selected normal population.
    • To analyze IgE level distribution across different age groups.
    • To explore the genetic basis of IgE level variations.

    Main Methods:

    • Solid phase radioimmunoassay (Phadebas Radioimmunosorbenttest "RIST") was used for IgE measurement.
    • The population was stratified into age-based subpopulations.
    • Statistical analysis, including Hardy-Weinberg equilibrium, was applied.

    Main Results:

    • Circulating IgE levels showed a multimodal distribution with three distinct maxima, not a Gaussian distribution.
    • The distribution aligned with Hardy-Weinberg law frequencies for atopic (a) and non-atopic (A) alleles (0.152 and 0.846).
    • The adjusted mean IgE level was 33 U/ml, slightly higher than reported in recent studies, with no significant age-related variation.

    Conclusions:

    • IgE levels in a normal population follow a multimodal distribution influenced by genetic factors (atopic/non-atopic alleles).
    • Exclusion of specific genetic groups normalizes the distribution, supporting a genetic model.
    • The findings provide a more accurate reference for IgE levels and their genetic underpinnings.

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