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Related Experiment Videos

Amyloid formation in prolactinoma.

T Kubota, E Kuroda, T Yamashima

    Archives of Pathology & Laboratory Medicine
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Culture technique of human pituitary adenoma cells.

    Methods in molecular medicine·2011

    Researchers investigated amyloid deposits in prolactin-secreting pituitary adenomas. Findings suggest neoplastic cells produce amyloid fibrils, potentially linked to hormone-related proteins.

    Area of Science:

    • Endocrinology
    • Pathology
    • Cell Biology

    Background:

    • Pituitary adenomas are common tumors, and understanding their composition is crucial for diagnosis and treatment.
    • Amyloid deposition is a pathological hallmark observed in various tissues, but its specific role in pituitary adenomas requires further elucidation.

    Observation:

    • Microscopic examination revealed amyloid deposits within a prolactin-secreting pituitary adenoma.
    • Congo red staining demonstrated characteristic green-yellow birefringence under polarized light, indicative of amyloid.
    • Immunohistochemistry confirmed prolactin-positive areas within spheroidal amyloid concretions.

    Findings:

    • Amyloid fibrils, measuring 10-13 nm in width with a hollow core, were observed both extracellularly and intracellularly within adenoma cells.

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  • Intracellular localization suggests neoplastic cells as the source of amyloid, rather than mesenchymal cells.
  • The association of prolactin-positive material within amyloid bodies indicates a potential link between hormone-related proteins and amyloid formation.

    • Implications:

    • This study provides novel insights into the ultrastructural characteristics and cellular origin of amyloid in pituitary adenomas.
    • Understanding the source and composition of amyloid may offer new diagnostic markers or therapeutic targets for pituitary adenomas.
    • Further research into hormone-protein interactions in amyloidogenesis could advance our knowledge of pituitary tumor pathology.