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Related Experiment Videos

quality control in steroid hormone receptor analyses

R K Wagner, P W Jungblut

    Cancer
    |December 15, 1980
    PubMed
    Summary

    Standardizing steroid hormone receptor assays in cancer tissue is crucial for reliable multi-center studies. Key methods include proper cooling, homogenization, and using charcoal adsorption with Scatchard plots for estrogen and progesterone receptor analysis.

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    Area of Science:

    • Endocrinology
    • Oncology
    • Biochemistry

    Background:

    • Steroid hormone receptors (e.g., estrogen and progesterone receptors) are critical biomarkers in cancer diagnostics and treatment.
    • Variability in laboratory methods for receptor determination can lead to incomparable results across different institutions.

    Purpose of the Study:

    • To outline essential standards for steroid hormone receptor determination in cancer tissue.
    • To emphasize the importance of standardization for reproducible and comparable receptor values in multi-center research.

    Main Methods:

    • Standardization of tissue sample handling: immediate cooling and homogenization at liquid nitrogen temperatures.
    • Inclusion of sulfhydryl-protecting agents in extraction media.
    • Adoption of reproducible assay procedures, specifically suggesting the charcoal adsorption method with Scatchard plot analysis for ER and PR assays.
    • Standardization of reference assays like protein and DNA assays.
    • Utilizing lyophilized calf uterus homogenates for quality control.

    Main Results:

    • Established a set of critical steps for standardizing steroid hormone receptor assays.
    • Recommended specific methods for receptor extraction and assay, including charcoal adsorption and Scatchard plots.
    • Highlighted the necessity of quality control measures and standardization of reference procedures.

    Conclusions:

    • Standardized methods for steroid hormone receptor determination are essential for reliable cancer research.
    • Implementing these standards ensures comparability of receptor values across different centers, facilitating multi-center studies.
    • Further recommendations include nuclear estradiol determination via radioimmunoassay.

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