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Related Experiment Videos

Endocrine cells producing regulatory peptides.

E Solcia, L Usellini, R Buffa

    Experientia
    |July 15, 1987
    PubMed
    Summary
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    This review discusses regulatory peptides in endocrine cells and tumors across various organs. Endocrine tumors can produce both normal and abnormal peptides, with malignant tumors often secreting inappropriate ones.

    Area of Science:

    • Endocrinology
    • Molecular Biology
    • Oncology

    Background:

    • Regulatory peptides and propeptide sequences are key in endocrine cells and tumors.
    • These peptides are found in the gastrointestinal tract, pancreas, lung, thyroid, pituitary, adrenals, and paraganglia.

    Purpose of the Study:

    • To review and discuss the immunolocalization of regulatory peptides and related propeptide sequences.
    • To identify the main peptide products in various endocrine cell types and tumors.

    Main Methods:

    • Immunohistochemical analysis of regulatory peptides and propeptide sequences.
    • Review of existing literature on peptide expression in endocrine cells and tumors.

    Main Results:

    • Specific peptides are identified as main products in gastrointestinal (e.g., gastrin, CCK, PYY), pancreatic (e.g., insulin, glucagon, somatostatin), and pulmonary endocrine cells (e.g., bombesin-related peptides).

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  • Thyroid C cells express calcitonin and CGRP; pituitary cells produce ACTH and endorphins; adrenal and paraganglionic cells contain enkephalins and NPY.
  • Endocrine tumors can express tissue-appropriate and inappropriate regulatory peptides, with malignant tumors more frequently producing inappropriate peptides.

    • Conclusions:

    • Regulatory peptides exhibit diverse tissue-specific expression patterns in normal endocrine cells.
    • Endocrine tumors, particularly malignant ones, can aberrantly express regulatory peptides, offering potential diagnostic and therapeutic targets.