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Related Experiment Videos

What can be measured with RAST?

P Bongrand, D Vervloet, R Depieds

    Journal of Immunological Methods
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    The Radioallergosorbent test (RAST) results are unpredictable, influenced by serum and allergosorbent. New methods quantify specific IgE antibodies and their affinity, improving allergy diagnostics.

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    Area of Science:

    • Immunology
    • Allergy Diagnostics

    Background:

    • The Radioallergosorbent test (RAST) is widely used for allergy diagnosis.
    • Interpreting RAST results can be challenging due to variability.

    Purpose of the Study:

    • To theoretically analyze the basic principles of RAST.
    • To identify factors influencing RAST numerical values.
    • To propose a method for more accurate quantification of IgE antibodies.

    Main Methods:

    • Theoretical analysis of RAST principles.
    • Measurement of specific IgE antibody percentage, level, and affinity.
    • Application of graphical techniques using serum dilutions.
    • Expression of results in arbitrary IgE units and allergosorbent capacity.

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    Main Results:

    • RAST values depend unpredictably on serum and allergosorbent.
    • Three key factors influencing RAST can be measured: IgE percentage, IgE level, and IgE level-affinity product.
    • A graphical method using four serum dilutions allows determination of these factors.
    • Results are standardized into arbitrary IgE units and allergosorbent capacity.

    Conclusions:

    • Theoretical calculations explain the lack of correlation between RAST results and clinical parameters.
    • The proposed method simplifies the assessment of specific IgE antibodies.
    • This approach reduces the need for complex procedures like IgE antibody purification.