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Related Experiment Videos

Immunoassay of enzymes.

D T Forman

    Annals of Clinical and Laboratory Science
    |July 1, 1977
    PubMed
    Summary

    Researchers developed specific antisera for human placental alkaline phosphatase (PAP) and creatine kinase (CK) isoenzymes. These novel immunoassay techniques offer enhanced specificity and quantitation for isoenzyme analysis in clinical diagnostics.

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    Area of Science:

    • Biochemistry
    • Immunology
    • Clinical Chemistry

    Background:

    • Accurate quantification of enzyme isoenzymes is crucial for diagnosing various diseases.
    • Existing electrophoretic methods for isoenzyme analysis can lack specificity and sensitivity.
    • Human placental alkaline phosphatase (PAP) and creatine kinase (CK) isoenzymes are important clinical markers.

    Purpose of the Study:

    • To develop specific antisera for human placental alkaline phosphatase (PAP) and creatine kinase (CK) isoenzymes.
    • To establish a simple, reproducible immunoassay method for quantifying PAP and CK isoenzymes.
    • To compare the performance of the immunoassay with existing electrophoretic techniques.

    Main Methods:

    • Production of antisera in rabbits against purified PAP and crystallized CK isoenzyme (MM) from human skeletal muscle.
    • Radial immunodiffusion and quantitative precipitation assays to assess antiserum specificity and cross-reactivity.
    • Development of a 'rocket' electroimmunoassay for PAP and CK using small volumes of antiserum.

    Main Results:

    • PAP antiserum showed no cross-reactivity with alkaline phosphatases from human liver, intestine, or bone disease patients' sera.
    • CK antiserum demonstrated no cross-reaction and was quantitatively precipitated by homologous antisera.
    • The 'rocket' electroimmunoassay proved simple, reproducible, and effective for PAP and CK isoenzyme analysis.

    Conclusions:

    • Specific antisera against PAP and CK isoenzymes were successfully generated.
    • The developed 'rocket' electroimmunoassay offers high specificity and enhanced quantitation capabilities for isoenzyme assays.
    • This immunoassay method provides advantages over traditional electrophoretic techniques for clinical diagnostics.

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