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Related Experiment Videos

Secretory component: a glandular epithelial cell marker.

J P Harris, M A South

    The American Journal of Pathology
    |October 1, 1981
    PubMed
    Summary
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    Secretory component (SC) is a reliable marker for glandular epithelial cells. This study confirms SC fluorescence in glandular tumors, aiding in identifying the origin of malignant cells.

    Area of Science:

    • Oncology
    • Cell Biology
    • Immunohistochemistry

    Background:

    • Secretory component (SC) is produced by normal and malignant glandular epithelial cells.
    • The utility of SC as a specific marker for glandular epithelial-derived tumors requires further investigation.

    Purpose of the Study:

    • To evaluate the reliability of secretory component (SC) as a marker for tumor cells originating from glandular epithelium.
    • To assess the presence of SC in various tumor types using indirect immunofluorescence.

    Main Methods:

    • Indirect immunofluorescence technique was employed to detect SC in tumor tissues.
    • Analysis included both primary and metastatic tumors of diverse cellular origins.
    • Live and fixed single-cell preparations were examined for cell-surface and cytoplasmic SC fluorescence.

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    Main Results:

    • SC fluorescence was detected in all examined primary and metastatic tumors of glandular epithelial origin.
    • Tumors of non-glandular epithelial origin did not exhibit SC fluorescence.
    • Intense cell-surface SC fluorescence was observed in live glandular epithelial tumor cells.
    • Cytoplasmic SC fluorescence was present in fixed glandular epithelial tumor cells.
    • All breast carcinoma cases showed SC, irrespective of differentiation.

    Conclusions:

    • Secretory component (SC) is a dependable marker for identifying tumor cells of glandular epithelial origin.
    • The presence of SC in a tumor indicates its derivation from glandular epithelium, with potential clinical applications in cancer diagnostics.
    • This immunofluorescence assay offers a valuable tool for determining the epithelial origin of malignant cells.