Mechanisms of Exocytosis in Insulin-Secreting B-Cells and Glucagon-Secreting A-Cells

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Mechanisms of exocytosis in insulin-secreting B-cells and glucagon-secreting A-cells.

In pancreatic B- and A-cells, metabolic stimuli regulate biochemical and electrical processes that culminate in Ca2+-influx and release of insulin or glucagon, respectively. Like in other (neuro)endocrine cells, Ca2+-influx triggers the rapid exocytosis of hormone-containing secretory granules. Only a small fraction of granules (<1% in insulin-secreting B-cells) can be released immediately, whi...

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The molecular mechanisms underlying "kiss and run" or "cavicapture" exocytosis of dense core secretory vesicles are presently unclear. Although dynamin-1 has previously been implicated in the recapture process in neurons, the recruitment of this fission protein to a single exocytosing vesicle has not been examined in real time during peptide release from pancreatic beta-cells. Imaged simultaneo...

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Tight Coupling Between Electrical Activity and Exocytosis in Mouse Glucagon-Secreting -Cells

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ژورنال

عنوان ژورنال: Pharmacology & Toxicology

سال: 2003

ISSN: 0901-9928

DOI: 10.1034/j.1600-0773.2003.920102.x