Insulin undergoes extensive posttranslational modification along the production pathway. Production and secretion are largely independent; prepared insulin is stored awaiting secretion. Both C-peptide and mature insulin are biologically active.
GLP-1 and its analogs enhance insulin secretion, but the specific intracellular mechanisms in -cells remain unclear. Key intracellular mediators including calcium, glutamate, -aminobutyric acid, serotonin, and urocortin-3 are modulated by GLP-1 signaling with variable and sometimes contradictory effects.
It is interesting to note, compared to its basal insulin levels, 16.8 mM glucose dramatically and significantly stimulated (18-fold) increase in insulin secretion, and 10 nM supaglutide in the presence of 16.8 mM glucose yielded a 63-fold increase in human insulin secretion compared to the basal levels.
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Glucagon-like peptide 1 (GLP-1) exerts many actions that improve glycemic control. GLP-1 stimulates glucose-stimulated insulin secretion and protects cells, while its extrapancreatic effects include cardioprotection, reduction of hepatic glucose production, and regulation of satiety. Although an appealing antidiabetic drug candidate, the rapid degradation of GLP-1 by dipeptidyl peptidase 4 ...
GLP-1 stimulates insulin secretion and augments the insulin-releasing effects of glucose on the pancreatic beta cell. GLP-1 analogs have been developed for the treatment of type II diabetes mellitus.
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This proposal focuses on combination of GLP1 analogs with GHRH G-protein coupled receptor (GHRHR) agonist in preventing or reversing T1D. Extensive published evidence demonstrates that GLP1 receptor agonists augment insulin secretion and activates prosurvival and...
In addition, insulin secretion and Ca2+ influx mediated by S43126 [10-5M] were decreased following co-treatment with efaroxan (I1-antagonist) and nifedipine (L-type voltage-gated Ca2+-channel blocker) at various times (5-60mins).
