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A sensitive, specific, solid-phase enzymeimmunoassay for plasma progesterone

B G Joyce, A H Othick, G F Read

    Annals of Clinical Biochemistry
    |January 1, 1981
    PubMed
    Summary
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    A new enzymeimmunoassay (EIA) accurately measures plasma progesterone. This method is stable, sensitive, and comparable to radioimmunoassay (RIA), offering a reliable tool for hormonal analysis.

    Area of Science:

    • Biochemistry
    • Immunology
    • Endocrinology

    Background:

    • Accurate measurement of plasma progesterone is crucial for reproductive health monitoring.
    • Existing radioimmunoassay (RIA) methods have limitations, prompting the need for alternative techniques.

    Purpose of the Study:

    • To develop and validate a homologous enzymeimmunoassay (EIA) for quantifying plasma progesterone.
    • To assess the stability, specificity, and sensitivity of the developed EIA method.

    Main Methods:

    • Utilized a horseradish peroxidase conjugate as an enzyme label.
    • Developed a solid-phase antiserum covalently linked to microcrystalline cellulose for efficient separation.
    • Validated the EIA against a well-established radioimmunoassay (RIA).

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    Main Results:

    • The EIA demonstrated high specificity and sensitivity (4.8 pg/tube), suitable for all menstrual cycle phases.
    • The solid-phase antiserum and enzyme label exhibited excellent long-term stability.
    • EIA results showed strong agreement with RIA, with comparable specificity and assay variation.

    Conclusions:

    • The developed homologous enzymeimmunoassay provides a stable, sensitive, and accurate method for plasma progesterone determination.
    • This EIA is a viable alternative to RIA, offering comparable performance and ease of use.
    • The method has been successfully implemented and validated through external quality assurance programs.