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  • Title: ["Mixed" endocrine gland cells of the duodenal epithelium in various vertebrate animals and man].
    Author: Puzyrev AA, Ivanova VF.
    Journal: Arkh Anat Gistol Embriol; 1986 Apr; 90(4):48-54. PubMed ID: 3718252.
    Abstract:
    Epithelium of the duodenal mucous membrane has been studied in frog, rat and man by means of electron microscopy. Together with typical endocrinocytes, incretory cells of "mixed" type are revealed in the epithelium. They are classified into two types: 1. exo-endocrinic containing in their cytoplasm simultaneously: a) mucous and EC-granules, b) mucous and S-granules, c) granules specific for Paneth's cells and S-granules, d) granules specific for Paneth's cells and L-granules; 2. endocrinocytes with incretory granules of various types: with D and I, with D and EC, with D and L granules. Various ultramicroscopic organization of the "mixed" exo-endocrinic cells is demonstrated. It can be considered as various stages of their differentiation. In cytoplasm of the "mixed" cells of the second type (endocrinic) a constant presence of D-granules is revealed, that is, evidently, characteristic, within the limits of the gastro-entero-pancreatic system, for the cells with two types of the endocrinic granules.
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