1 month ago - GLP1R is also expressed in the brain where it is involved in the control of appetite. Upon binding to its ligand GLP-1, the GLP-1 receptor activates intracellular signaling pathways that regulate insulin secretion, glucose metabolism, and satiety.
- In this review, we present the individual signaling pathways for GLP-1R and GIPR in the pancreatic beta cell with a focus on the shared signaling pathways of the two receptors and interpret the implications of GLP-1R-GIPR co-activation in the light of recent co-activating therapeutic compounds.
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SUR1(/) islets lack an insulin secretory response but exhibit a normal rise in cAMP to GLP-1, implicating cAMP-dependent PKA-independent signal transduction pathway [20, 21]. It is now clear that the action of cAMP produced by GLP-1 signaling is mediated not just by PKA, but also by Epac2 ...
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- In pancreatic -cells, GLP-1R stimulated pathways act promptly (seconds to minutes) to potentiate glucose-dependent insulin release. This is achieved by a rapid increase in cAMP, which is accompanied by direct activation of PKA and EPAC.
- Our data confirm the importance of mTOR activity in the regulation of -cell energy metabolism and provide evidence that chronic GLP-1R signalling effects are mediated by the PI3K/mTOR pathway.
