Summary
In human duodenal mucosa Paneth cells originate away from the base of crypts and migrate towards the base during maturation The earliest cells in the Paneth cell lineage could be identified by labelling of lysozyme in the Golgi apparatus. Specific labelling for lysozyme was present in the rough endoplasmic reticulum, Golgi apparatus, condensing vacuoles, granules and many lysosomes of mature Paneth cells. The maturation of the Paneth cell is accompanied by an increase in the content of lysozyme in the secretory granules and with senescence lysozyme diffuses into the cytoplasm.
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Mathan, M., Hughes, J. & Whitehead, R. The morphogenesis of the human Paneth cell. Histochemistry 87, 91–96 (1987). https://doi.org/10.1007/BF00518730
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DOI: https://doi.org/10.1007/BF00518730