Entry
Name
Insulin secretion - Homo sapiens (human)
Description
Pancreatic beta cells are specialised endocrine cells that continuously sense the levels of blood sugar and other fuels and, in response, secrete insulin to maintain normal fuel homeostasis. Glucose-induced insulin secretion and its potentiation constitute the principal mechanism of insulin release. Glucose is transported by the glucose transporter (GLUT) into the pancreatic beta-cell. Metabolism of glucose generates ATP, which inhibits ATP-sensitive K+ channels and causes voltage-dependent Ca2+ influx. Elevation of [Ca2+]i triggers exocytotic release of insulin granules. Insulin secretion is further regulated by several hormones and neurotransmitters. Peptide hormones, such as glucagon-like peptide 1 (GLP-1), increase cAMP levels and thereby potentiate insulin secretion via the combined action of PKA and Epac2. Achetylcholine (ACh), a major parasympathetic neurotransmitter, binds to Gq-coupled receptors and activates phospholipase C- (PLC-), and the stimulatory effects involve activation of protein kinase C (PKC), which stimulates exocytosis. In addition, ACh mobilizes intracellular Ca2+ by activation of IP3 receptors.
Class
Organismal Systems; Endocrine system
BRITE hierarchy
Pathway map
Ortholog table
Drug
D00219 Acetohexamide (JP18/USP/INN)
D00271 Chlorpropamide (JP18/USP/INN)
D00294 Diazoxide (JAN/USP/INN)
D00379 Tolazamide (JAN/USP/INN)
D00380 Tolbutamide (JAN/USP/INN)
D00593 Glimepiride (JP18/USP/INN)
D00594 Repaglinide (JAN/USP/INN)
D01111 Nateglinide (JP18/USP/INN)
D01356 Glymidine sodium (JAN/USAN/INN)
D01799 Glyclopyramide (JAN/INN)
D01854 Mitiglinide calcium hydrate (JP18)
D02427 Glibornuride (USAN/INN)
D04121 Exenatide (JAN/USAN/INN)
D04740 Linogliride fumarate (USAN)
D06177 Tolbutamide sodium, sterile
D09723 Taspoglutide (USAN/INN)
D09729 Lixisenatide (JAN/USAN/INN)
D10970 Pegapamodutide (USAN/INN)
D11034 Insulin glargine and lixisenatide
D11419 Avexitide acetate (USAN)
D11567 Insulin degludec and liraglutide
D11911 Danuglipron tromethamine (USAN)
D11947 Efpeglenatide (USAN/INN)
D12529 Orforglipron calcium (USAN)
D12735 Lotiglipron tromethamine (USAN)
Other DBs
Organism
Homo sapiens (human) [GN:
hsa ]
Gene
6513 SLC2A1; solute carrier family 2 member 1 [KO:K07299 ]
6514 SLC2A2; solute carrier family 2 member 2 [KO:K07593 ]
54795 TRPM4; transient receptor potential cation channel subfamily M member 4 [KO:K04979 ]
23439 ATP1B4; ATPase Na+/K+ transporting family member beta 4 [KO:K01540 ]
481 ATP1B1; ATPase Na+/K+ transporting subunit beta 1 [KO:K01540 ]
482 ATP1B2; ATPase Na+/K+ transporting subunit beta 2 [KO:K01540 ]
483 ATP1B3; ATPase Na+/K+ transporting subunit beta 3 [KO:K01540 ]
486 FXYD2; FXYD domain containing ion transport regulator 2 [KO:K01538 ]
6833 ABCC8; ATP binding cassette subfamily C member 8 [KO:K05032 ]
3767 KCNJ11; potassium inwardly rectifying channel subfamily J member 11 [KO:K05004 ]
775 CACNA1C; calcium voltage-gated channel subunit alpha1 C [KO:K04850 ]
776 CACNA1D; calcium voltage-gated channel subunit alpha1 D [KO:K04851 ]
778 CACNA1F; calcium voltage-gated channel subunit alpha1 F [KO:K04853 ]
779 CACNA1S; calcium voltage-gated channel subunit alpha1 S [KO:K04857 ]
815 CAMK2A; calcium/calmodulin dependent protein kinase II alpha [KO:K04515 ] [EC:2.7.11.17 ]
817 CAMK2D; calcium/calmodulin dependent protein kinase II delta [KO:K04515 ] [EC:2.7.11.17 ]
816 CAMK2B; calcium/calmodulin dependent protein kinase II beta [KO:K04515 ] [EC:2.7.11.17 ]
818 CAMK2G; calcium/calmodulin dependent protein kinase II gamma [KO:K04515 ] [EC:2.7.11.17 ]
3778 KCNMA1; potassium calcium-activated channel subfamily M alpha 1 [KO:K04936 ]
157855 KCNU1; potassium calcium-activated channel subfamily U member 1 [KO:K05274 ]
3779 KCNMB1; potassium calcium-activated channel subfamily M regulatory beta subunit 1 [KO:K04937 ]
10242 KCNMB2; potassium calcium-activated channel subfamily M regulatory beta subunit 2 [KO:K04938 ]
27094 KCNMB3; potassium calcium-activated channel subfamily M regulatory beta subunit 3 [KO:K04939 ]
27345 KCNMB4; potassium calcium-activated channel subfamily M regulatory beta subunit 4 [KO:K04941 ]
3780 KCNN1; potassium calcium-activated channel subfamily N member 1 [KO:K04942 ]
3781 KCNN2; potassium calcium-activated channel subfamily N member 2 [KO:K04943 ]
3782 KCNN3; potassium calcium-activated channel subfamily N member 3 [KO:K04944 ]
3783 KCNN4; potassium calcium-activated channel subfamily N member 4 [KO:K04945 ]
2740 GLP1R; glucagon like peptide 1 receptor [KO:K04581 ]
2695 GIP; gastric inhibitory polypeptide [KO:K05258 ]
116 ADCYAP1; adenylate cyclase activating polypeptide 1 [KO:K05262 ]
117 ADCYAP1R1; ADCYAP receptor type I [KO:K04587 ]
1385 CREB1; cAMP responsive element binding protein 1 [KO:K05870 ]
1386 ATF2; activating transcription factor 2 [KO:K04450 ]
468 ATF4; activating transcription factor 4 [KO:K04374 ]
10488 CREB3; cAMP responsive element binding protein 3 [KO:K09048 ]
90993 CREB3L1; cAMP responsive element binding protein 3 like 1 [KO:K09048 ]
64764 CREB3L2; cAMP responsive element binding protein 3 like 2 [KO:K09048 ]
84699 CREB3L3; cAMP responsive element binding protein 3 like 3 [KO:K09048 ]
148327 CREB3L4; cAMP responsive element binding protein 3 like 4 [KO:K09048 ]
9586 CREB5; cAMP responsive element binding protein 5 [KO:K09047 ]
1388 ATF6B; activating transcription factor 6 beta [KO:K09049 ]
3651 PDX1; pancreatic and duodenal homeobox 1 [KO:K07594 ]
11069 RAPGEF4; Rap guanine nucleotide exchange factor 4 [KO:K04351 ]
9699 RIMS2; regulating synaptic membrane exocytosis 2 [KO:K15297 ]
27445 PCLO; piccolo presynaptic cytomatrix protein [KO:K16882 ]
5864 RAB3A; RAB3A, member RAS oncogene family [KO:K07882 ]
886 CCKAR; cholecystokinin A receptor [KO:K04194 ]
1131 CHRM3; cholinergic receptor muscarinic 3 [KO:K04131 ]
2864 FFAR1; free fatty acid receptor 1 [KO:K04325 ]
2767 GNA11; G protein subunit alpha 11 [KO:K04635 ]
3710 ITPR3; inositol 1,4,5-trisphosphate receptor type 3 [KO:K04960 ]
6844 VAMP2; vesicle associated membrane protein 2 [KO:K13504 ]
6616 SNAP25; synaptosome associated protein 25 [KO:K18211 ]
Compound
C01245 D-myo-Inositol 1,4,5-trisphosphate
Reference
Authors
Seino S, Shibasaki T, Minami K
Title
Pancreatic beta-cell signaling: toward better understanding of diabetes and its treatment.
Journal
Reference
Authors
Jitrapakdee S, Wutthisathapornchai A, Wallace JC, MacDonald MJ
Title
Regulation of insulin secretion: role of mitochondrial signalling.
Journal
Reference
Authors
Rorsman P, Braun M
Title
Regulation of insulin secretion in human pancreatic islets.
Journal
Reference
Authors
Jones PM, Persaud SJ
Title
Protein kinases, protein phosphorylation, and the regulation of insulin secretion from pancreatic beta-cells.
Journal
Reference
Authors
MacDonald PE
Title
Signal integration at the level of ion channel and exocytotic function in pancreatic beta-cells.
Journal
Reference
Authors
Lang J
Title
Molecular mechanisms and regulation of insulin exocytosis as a paradigm of endocrine secretion.
Journal
Reference
Authors
Kieffer TJ, Habener JF
Title
The glucagon-like peptides.
Journal
Reference
Authors
Girard J
Title
The incretins: from the concept to their use in the treatment of type 2 diabetes. Part A: incretins: concept and physiological functions.
Journal
Reference
Authors
Holz GG
Title
New insights concerning the glucose-dependent insulin secretagogue action of glucagon-like peptide-1 in pancreatic beta-cells.
Journal
Reference
Authors
Holst JJ, Gromada J
Title
Role of incretin hormones in the regulation of insulin secretion in diabetic and nondiabetic humans.
Journal
Reference
Authors
Doyle ME, Egan JM
Title
Mechanisms of action of glucagon-like peptide 1 in the pancreas.
Journal
Reference
Authors
Kim W, Egan JM
Title
The role of incretins in glucose homeostasis and diabetes treatment.
Journal
Reference
Authors
Seino S, Takahashi H, Fujimoto W, Shibasaki T
Title
Roles of cAMP signalling in insulin granule exocytosis.
Journal
Reference
Authors
Tengholm A
Title
Cyclic AMP dynamics in the pancreatic beta-cell.
Journal
Reference
Authors
Holz GG
Title
Epac: A new cAMP-binding protein in support of glucagon-like peptide-1 receptor-mediated signal transduction in the pancreatic beta-cell.
Journal
Reference
Authors
Gloerich M, Bos JL
Title
Epac: defining a new mechanism for cAMP action.
Journal
Reference
Authors
Bos JL
Title
Epac proteins: multi-purpose cAMP targets.
Journal
Reference
Authors
Filipsson K, Kvist-Reimer M, Ahren B
Title
The neuropeptide pituitary adenylate cyclase-activating polypeptide and islet function.
Journal
Reference
Authors
Kebede MA, Alquier T, Latour MG, Poitout V
Title
Lipid receptors and islet function: therapeutic implications?
Journal
Reference
Authors
Morgan NG, Dhayal S
Title
G-protein coupled receptors mediating long chain fatty acid signalling in the pancreatic beta-cell.
Journal
Related pathway
KO pathway