Journal ArticleDOI
Ultrastructural alterations of the pancreatic D cell in the domestic fowl following vagotomy
Tohru Watanabe,Toshitake Fujioka +1 more
TLDR
The present results provide new morphological evidence for the vagus-nerve control of D cells, which may regulate the activity of islet cells.Abstract:
In an attempt to determine the neural control of pancreatic D cells, the pancreatic islets of the domestic fowl were examined electron microscopically from 1 to 28 days after abdominal vagotomy Exocytotic release of many secretory granules from D cells occurred one day after vagotomy Rough endoplasmic reticulum developed and formed an arrangement of concentric whorls in the cytoplasm of D cells after axotomy The altered D cells were also characterized by the occurrence of many peculiar dense bodies in the apical cytoplasm at all time periods studied These bodies varied in shape and size, containing several round vesicles The D cells were extensively depleted of granules after the longer time periods following vagotomy The present results provide new morphological evidence for the vagus-nerve control of D cells, which may regulate the activity of islet cellsread more
Citations
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Journal ArticleDOI
Influence of vagotomy in domestic fowls on feeding activity, food passage, digestibility and satiety effects of two peptides
Savory Cj,Hodgkiss Jp +1 more
TL;DR: The results of these experiments indicate that efferent information affecting rate of passage and digestibility travels via the vagus, but that afferent information concerned with initiation and termination of meals, and with satiety effects of BBS and CCK8, does not.
Book ChapterDOI
Innervation of endocrine tissues
TL;DR: Focus at the examination of the link between the neural and the endocrine apparatus at the site of the hypothalamic neurosecretory centers and the lack of adequate methods for the demonstration of morphological and functional relationships between peripheral nerves and endocrine cells prevented to successfully approach the problem of a direct nervous control ofendocrine cells by conventional synaptic transmission.
Book ChapterDOI
Insulin secretion in birds
TL;DR: This chapter discusses the control of insulin secretion in avian species, mostly the domestic fowl, and presents the comparison of insulin gland secretion in genetically fat and lean chickens.
Journal ArticleDOI
Intercalated duct cells in the chicken pancreatic islet with special reference to the alloxan administration
TL;DR: The present findings may suggest that intercalated ducts are not only anatomically important as a structure passing through the islets but also play physiologically by protecting the islet endocrine cells.
Journal ArticleDOI
Endoplasmic reticulum whorls as a source of membranes for early cytaster formation in parthenogenetically stimulated sea urchin eggs
TL;DR: It is suggested that whorl disruption and the formation of associated astral areas can be correlated with a corresponding decrease in the concentration of this released calcium in the cytoplasm.
References
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Journal ArticleDOI
Immunohistochemistry and ultrastructure of somatostatin cells with special reference to the gastroenteropancreatic (GEP) system
TL;DR: Current knowledge of the D cell is summarized with respect to the results obtained in the laboratory and its analysis morphologically and functionally by means of immunohistochemical staining for somatostatin is enabled.
Journal ArticleDOI
Pancreatic and gastric release of somatostatinlike immunoreactivity during intestinal phase of a meal.
TL;DR: It is concluded that during the intestinal phase of a protein meal, pancreatic and antral but not fundic SLI release is stimulated, and a close interaction between the vagus and muscarinic cholinergic mechanisms and the D cells of the stomach and pancreas is suggested.
Journal ArticleDOI
Electron microscopic study on the innervation of the pancreas of the domestic fowl
Tohru Watanabe,Mikio Yasuda +1 more
TL;DR: The innervation of the pancreas of the domestic fowl was studied electron microscopically and it was found that the exocrine tissue receives a richer nervous supply than the endocrine tissue.
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Effects of vagotomy on the ultrastructure of the parathyroid gland of the rabbit
Hideo Isono,Shizuko Shoumura +1 more