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Ultrastructure of endocrine cells in the stomach of two teleost fish Perca fluviatilis L. and Ameiurus nebulosus L.

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Summary

In the gastric mucosa of two teleost species, the perch (Perca fluviatilis) and the catfish (Ameiurus nebulosus) three endocrine cell types were found, located predominantly between the mucoid cells of the gastric mucosa. A fourth cell type is present in the gastric glands of catfish. Each cell type was defined by its characteristic secretory granules. Type-I cells were predominant in both fish. These cells contained round or oval granules with a pleomorphic core. The average diameter of granules was 400 nm for the perch and 270 nm for the catfish. Type-II cells of both species displayed small, highly osmiophilic granules about 100 nm in diameter. The secretory granules of type-III cells (260 nm in the perch and 190 nm in the catfish) were round or slightly oval in shape and were filled with a finely particulate electron-dense material. Type-IV cells of the catfish were found in the gastric glands only. Their cytoplasm was filled with homogeneous, moderately electron-dense granules averaging 340 nm in diameter. The physiological significance of these different morphological types of gastric endocrine cells requires further investigation.

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Authors and Affiliations

  1. Laboratoire de Biologie Cellulaire, Université Paul Sabatier, Toulouse, France

    Jacqueline Noaillac-Depeyre

  2. Centre de Recherche de Biochimie et de Génétique Cellulaires du CNRS, Université Paul Sabatier, Toulouse, France

    Nicole Gas

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  1. Jacqueline Noaillac-Depeyre
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  2. Nicole Gas
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Noaillac-Depeyre, J., Gas, N. Ultrastructure of endocrine cells in the stomach of two teleost fish Perca fluviatilis L. and Ameiurus nebulosus L.. Cell Tissue Res. 221, 657–678 (1982). https://doi.org/10.1007/BF00215709

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