A mechanism by which glucagon‐like peptide‐1 receptor activation induces human β‐cellproliferation only within a restricted time window was recently suggested in a study in which human islets were grafted into immunodeficient mice.
Conclusions:GLP-1RAs demonstrate a robust anti-apoptotic effect on pancreaticbetacellsin preclinical models, supporting their role in preservingbetacellmass. However, extreme heterogeneity and unresolved questions about long-term functional exhaustion warrant cautious interpretation.
Fundamental pancreatic β-cellfunction is to produce and secrete insulin in response to blood glucose levels. However, when β-cellsare chronically exposed to hyperglycemia in type 2 diabetes mellitus (T2DM), insulin biosynthesis and secretion are decreased together with reduced expression of insulin transcription factors. Glucagon-like peptide-1 (GLP-1) plays a crucial role in pancreatic β ...
This umbrella review synthesizes the evidence for safety and efficacyGLP-1receptor agonists on multiple outcomes including but not limited to metabolic, cardiovascular and renal outcomes.
GLP-1RAs work by mimickingGLP-1, a peptide hormone produced in the intestines after a meal that enhances insulin secretion, suppresses glucagon, promotesbeta-cellproliferation, slows gastric emptying, and restores insulin-secreting functions. 4 BecauseGLP-1RAs resist degradation by enzymes, they have a longer half-life thanGLP-1, improving ...
GLP-1andits analogs enhance insulin secretion, but the specific intracellular mechanisms in β-cellsremain unclear. Key intracellular mediators including calcium, glutamate, γ-aminobutyric acid, serotonin, and urocortin-3 are modulated byGLP-1signaling with variable and sometimes contradictory effects.
