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Vesicular binesis: glucose effect on insulin secretory vesicles
Science (New York, N.Y.)
|January 17, 1975
Summary
Vesicular binesis, a membrane process in beta cells, increases with glucose stimulation. This suggests vesicles actively participate in insulin release.
Area of Science:
- Cell Biology
- Endocrinology
- Diabetes Research
Background:
- Insulin secretion from pancreatic beta cells is crucial for glucose homeostasis.
- The precise mechanisms of insulin vesicle release are still under investigation.
Purpose of the Study:
- To investigate the phenomenon of vesicular binesis in pancreatic beta cells.
- To determine the effect of glucose concentration on vesicular binesis.
- To explore the role of vesicular membrane alterations in insulin release.
Main Methods:
- Observation of pancreatic beta cell morphology.
- Incubation of islets of Langerhans at varying glucose concentrations.
- Microscopic analysis of vesicular membrane structures.
Main Results:
- Binesis, a lingula formation of the insulin secretory vesicle membrane indenting an adjacent vesicle, was observed.
- Vesicular binesis significantly increased when islets were incubated at a stimulatory glucose concentration (300 mg/dL).
Conclusions:
- Vesicular binesis represents a morphological change associated with insulin secretory vesicle activation.
- The vesicle membrane plays an active role in the insulin release mechanism.
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