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Related Experiment Videos

A solid-phase fluoroimmunoassay of tobramycin

Y G Tsay, R J Palmer

    Clinica Chimica Acta; International Journal of Clinical Chemistry
    |January 22, 1981
    PubMed
    Summary

    A new solid-phase fluoroimmunoassay offers a fast and simple method for determining tobramycin (an antibiotic) in serum. This assay avoids radiochemicals and shows high correlation with existing methods.

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    Area of Science:

    • Clinical Chemistry
    • Immunoassay Development
    • Analytical Chemistry

    Background:

    • Accurate measurement of tobramycin in serum is crucial for therapeutic drug monitoring.
    • Existing methods like radioimmunoassay and radioenzymatic assay have limitations, including the use of radiochemicals.

    Purpose of the Study:

    • To develop and validate a novel solid-phase fluoroimmunoassay for tobramycin determination in serum.
    • To provide a faster, simpler, and safer alternative to existing tobramycin assays.

    Main Methods:

    • Development of a solid-phase fluoroimmunoassay utilizing fluorescein-labeled tobramycin and immobilized antibodies on a dipstick.
    • Separation of bound and free labeled hapten by sampler removal.
    • Quantification of fluorescence signal using a FIAX fluorometer.

    Main Results:

    • The assay demonstrated good precision with within-assay coefficients of variation less than 10%.
    • High correlation was observed between the fluoroimmunoassay and established methods: radioimmunoassay (r = 0.97) and radioenzymatic assay (r = 0.96).
    • The fluorescein-labeled tobramycin conjugate exhibited stability and ease of preparation.

    Conclusions:

    • The developed solid-phase fluoroimmunoassay is a reliable, rapid, and user-friendly method for serum tobramycin measurement.
    • This assay offers a viable alternative to radiochemical-based methods, enhancing safety and simplicity in clinical laboratories.

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