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The microanatomy of canine islets of Langerhans: implications for intra-islet regulation by P. Redecker; A. Seipelt; A. Jörns; G. Bargsten; D. Grube is a Neuroscience article available to read on EtoBox.

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In recent years models for the internal ("intra-islet") regulation of hormone secretion have been proposed to explain how different islet cells might regulate each other by means of their respective secretory peptides. Models that emphasize the importance of a directed intra-islet blood flow and sequence of perfusion of islet cells rely on a certain type of islet microanatomy and vascular supply. The experimental studies underlying these models have partly been performed in dogs. To extend the incomplete morphological knowledge of the canine endocrine pancreas both canine islets of Langerhans and extrainsular cells have been analysed in immunostained serial semithin (0.5 microns) sections. In addition to their occurrence within islets of Langerhans, all endocrine cell types are also found at extrainsular sites (about 9% of all endocrine cells) where they are distributed in different quantities among the epithelial lining of exocrine acini or excretory ducts and the connective tissue. There are continuous transitions from single extrainsular cells to small mono- and polycellular cell groups to islets. In a comprehensive analysis of whole islets, including computer-assisted three-dim

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Author

P. Redecker; A. Seipelt; A. Jörns; G. Bargsten; D. Grube

Publisher

Springer; Springer-Verlag; Springer Verlag; J.F. Bergmann; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0340-2061)

Published

1992

Language

EN

Field

Neuroscience (Life Sciences)