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Pubmed ID :1360408
Publication Date : //

[Immunocytochemical studies on the pancreatic endocrine cells in the Japanese newt (Cynopus pyrrhogaster)].


Pancreatic endocrine cells were examined by light and electron microscopic immunocytochemistry to discuss the co-localization of peptides in one cell type. A cells were irregular in shape with an occasional long cytoplasmic process, and contained glucagon-immunoreactive granules with various contours. These granules were 160-300nm in diameter with various density, and also immunoreactive to anti-human pancreatic polypeptide (PP) serum. A part of them were further immunoreactive to anti-somatostatin serum. B cells were round to elliptical in shape, and often aggregated around the capillaries. Granules of B cells were round to irregular in shape, 270-410 nm in diameter, and immunoreactive to anti-insulin serum. D cells were irregular in shape with meager cytoplasm, and contained somatostatin-immunoreactive granules. These granules were ovoid or teardrop in shape, 140-250nm in longitudinal diameter, and immunoreactive to both anti-somatostatin and anti-human PP sera. PP cells were round to spindle-shaped, and contained human PP-immunoreactive round granules 150-35nm in diameter. These findings reveal the existence of at least 4 types of endocrine cells secreting glucagon, insulin, somatostatin, and PP, respectively, in the newt pancreas, and suggest the co-localization of some of these peptides in one cell type.

Authors : Oikawa T , Ogawa K , Taniguchi K ,

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