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PubMed · 26133

[APUD system of endocrine cells. Morphological and histochemical characteristics].

E Hage·M Hansen
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APUD CellsAmino AcidsHistocytochemistryHumansMicroscopy, FluorescencePeptidesEnglish AbstractJournal Article

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E Hage, M Hansen. 1978-05-01. [APUD system of endocrine cells. Morphological and histochemical characteristics].. https://pubmed.ncbi.nlm.nih.gov/26133/

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APUD-type recepto-secretory cells in the chicken lung.

The epithelium of the intrapulmonary airways of the chicken lung has been studied by fluorescence and electron microscopy. Numerous intensely yellow-fluorescent cells occur in the epithelium of the primary and secondary bronchi. The cell cytoplasm contains characteristic granular vesicles with an electron-dense central core. The vesicles react positively to chromaffin and argentaffin treatment, indicating that they are possible storage sites for amines. Synapse-like junctions occur between the granular cells and the intraepithelial nerve endings, filled with numerous mitochondria, suggesting that these granular cells may have a dual function as both receptor and endocrine cell.

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