1. Effects of inhibition of phosphodiesterase 3B in pancreatic islets on insulin secretion: a potential link with some stimulatory pathways.
- Author
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Kilanowska A and Szkudelski T
- Subjects
- Animals, Dose-Response Relationship, Drug, Glucose pharmacology, Signal Transduction drug effects, Amrinone pharmacology, Cyclic Nucleotide Phosphodiesterases, Type 3 metabolism, Insulin Secretion drug effects, Islets of Langerhans drug effects, Islets of Langerhans metabolism, Phosphodiesterase 3 Inhibitors pharmacology
- Abstract
Objective: Elevated intracellular cAMP concentrations potentiate insulin secretion from pancreatic β cells. Phosphodiesterase 3B (PDE3B) is highly expressed in these cells and plays a role in the regulation of insulin secretion., Materials and Methods: In this study, effects of amrinone, an inhibitor of PDE3B on insulin release from isolated pancreatic islets, were determined., Results: Exposure of islets to amrinone for 15, 30 and 90 min markedly increased secretion induced by 6.7 mM glucose. Amrinone enhanced also secretion stimulated by 6.7 mM glucose and DB-cAMP, an activator of PKA. It was also demonstrated that amrinone potentiated insulin secretion induced by 6.7 mM glucose in the combination with PMA (activator of PKC) or acetylcholine. However, the insulin-secretory response to glucose and glibenclamide was unchanged by amrinone., Conclusions: These results indicate that amrinone is capable of increasing insulin secretion; however, its action is restricted.
- Published
- 2021
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