GLP-1 7-36 is a 30 amino acid peptide derived from the proglucagon molecule that is synthesised in intestinal L cells, as well as in alpha cells of the pancreas and in neuronal clusters of the central nervous system (CNS).2 It is a peptide with a short half-life (23 min), due to rapid renal clearance and degradation by the enzyme dipeptidyl peptidase-4 (DPP-4), which converts GLP-1 into GLP-1 9-36, a form that does not interact with the GLP-1 receptor.1 The GLP-1 receptor (GLP-1R) belongs to the class B G protein-coupled glucagon receptor family.2,3 Activation of the Gs subunit leads to stimulation of adenylate cyclase, synthesis of cyclic AMP, mobilisation of intracellular calcium, and glucose-dependent insulin release by pancreatic beta cells.2,3 Intracellular signalling also involves various additional pathways, such as recruitment of beta-arrestin-1, which modulates receptor internalisation and desensitisation, as well as the effects of certain GLP-1R agonists.3,4 Depending on the structure of the ligand, intracellular signalling pathways are modulated towards cyclic AMP generation, activation of kinase cascades (ERK), and beta-arrestin-1 recruitment, all of which influence the biological effect and desensitisation of the GLP-1 receptor.4 Some GLP-1R agonists exhibit biased agonism, favouring intracellular activation of cyclic AMP with reduced beta-arrestin recruitment, which results in less GLP-1R desensitisation and a more prolonged biological action (Table 1)

Vitamin C th h mi Vitamin C (tn khoa hc l Acid Ascobic) c chnh thc pht hin v chit xut vo nm 1928 bi nh nghin cu Albert Szent Gyorgyi
Methanethiol (CH 3 SH, methyl mercaptan), ethanethiol (C 2 H 5 SH, ethyl mercaptan), propanethiol (C 3 H 7 SH), butanethiols (C 4 H 9 SH, n -butyl mercaptan and tert -Butyl mercaptan, are common reagents
1,2,3 Viridian D-Ribose Energy Complex Benefits: Featuring Magnesium to contribute to normal energy-yielding metabolism
Role of host GPR120 in mediating dietary omega-3 fatty acid inhibition of prostate cancer