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Related Experiment Videos

[Steroid receptors in malignant melanomas].

W Eiermann, C Luderschmidt, A Burgkart

    Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, Und Verwandte Gebiete
    |July 1, 1985
    PubMed
    Summary

    Hormone receptors in melanoma were investigated. While some estrogen, progesterone, and glucocorticosteroid receptors were found, a false-positive result was noted with certain estradiol labeling methods in melanoma studies.

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    Zoledronic acid combined with adjuvant endocrine therapy of tamoxifen versus anastrozol plus ovarian function suppression in premenopausal early breast cancer: final analysis of the Austrian Breast and Colorectal Cancer Study Group Trial 12.

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    Area of Science:

    • Oncology
    • Endocrinology
    • Biochemistry

    Context:

    • Malignant melanoma growth is hypothesized to be hormone-induced.
    • Hormone receptors are crucial for mediating hormonal effects.
    • Demonstrating hormone receptors in melanoma tissue can validate this hypothesis.

    Purpose:

    • To investigate the presence of free-cytosolic steroid hormone receptors (estrogen, progesterone, glucocorticosteroid) in melanoma samples.
    • To assess the validity of the DCC assay for detecting these receptors.
    • To identify potential false-positive results in receptor detection methods.

    Summary:

    • Fifty melanoma samples were analyzed for free-cytosolic estrogen, progesterone, and glucocorticosteroid receptors using the DCC assay.
    • Free estrogen and progesterone receptors were detected in 20 samples, and glucocorticosteroid receptors in 10 samples.
    • A false-positive demonstration of estrogen receptors occurred with fourfold-labeled estradiol due to tyrosinase activity, but was corrected using twofold-labeled estradiol or L-dopa.

    Impact:

    • Findings indicate the presence of steroid hormone receptors in some malignant melanomas, suggesting a potential role for hormones in melanoma growth.
    • The study highlights the importance of assay methodology, identifying a specific false-positive issue with certain estradiol labeling techniques.
    • Receptor presence was not correlated with patient sex, melanoma type, invasion level, or prognostic index, but was less frequent in metastases than primary tumors.

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