PMID- 21293084 OWN - NLM STAT- MEDLINE DCOM- 20110322 LR - 20181201 IS - 1941-9260 (Electronic) IS - 0032-5481 (Linking) VI - 123 IP - 1 DP - 2011 Jan TI - Focus on incretin-based therapies: targeting the core defects of type 2 diabetes. PG - 53-65 LID - 10.3810/pgm.2011.01.2245 [doi] AB - Glucose homeostasis is regulated by a complex interaction of hormones, principally including insulin, glucagon, amylin, and the incretins. Glucagon, cortisol, catecholamines, and growth hormone serve as the classic glucose counterregulatory hormones. The incretins are hormones released by enteroendocrine cells in the intestine in response to a meal. Classically, type 2 diabetes mellitus (T2DM) has been considered to be a triad of insulin resistance, increased hepatic gluconeogenesis, and progressive beta-cell exhaustion/failure. However, disordered enteroendocrine physiology, specifically the reduced activity of glucagon-like peptide-1 (GLP-1), is also a principal pathophysiologic abnormality of the disease. Glucagon-like peptide-1 receptor agonists that have been studied include exenatide and liraglutide, which have been approved by the US Food and Drug Administration for use in patients with T2DM. Sitagliptin and saxagliptin, both approved for use in the United States, modulate incretin physiology by inhibiting degradation of GLP-1 by the enzyme dipeptidyl peptidase-4 (DPP-4). Modulators of incretin physiology have been shown to improve glycemic control with a low risk for hypoglycemia and beneficially affect beta-cell function. Unlike the DPP-4 inhibitors, GLP-1 receptor agonist therapy also produces weight loss, an important consideration given the close association among T2DM, overweight/obesity, and cardiovascular disease. The GLP-1 receptor agonists have also demonstrated beneficial effects on cardiovascular risk factors other than hyperglycemia and excess body weight, such as lipid concentrations and blood pressure. This article describes incretin physiology and studies of pharmacologic therapy designed to address the blunted incretin response in patients with T2DM. Information was obtained by a search of the PubMed and MEDLINE databases for articles published from January 1, 1995 to June 1, 2009. FAU - Jellinger, Paul S AU - Jellinger PS AD - University of Miami, Miami, FL, USA. pjellinger@diabetes-endocare.com LA - eng PT - Journal Article PT - Review PL - England TA - Postgrad Med JT - Postgraduate medicine JID - 0401147 RN - 0 (Dipeptides) RN - 0 (Dipeptidyl-Peptidase IV Inhibitors) RN - 0 (GLP1R protein, human) RN - 0 (Glucagon-Like Peptide-1 Receptor) RN - 0 (Hypoglycemic Agents) RN - 0 (Incretins) RN - 0 (Peptides) RN - 0 (Pyrazines) RN - 0 (Receptors, Glucagon) RN - 0 (Triazoles) RN - 0 (Venoms) RN - 839I73S42A (Liraglutide) RN - 89750-14-1 (Glucagon-Like Peptide 1) RN - 9GB927LAJW (saxagliptin) RN - 9P1872D4OL (Exenatide) RN - PJY633525U (Adamantane) RN - TS63EW8X6F (Sitagliptin Phosphate) SB - IM MH - Adamantane/analogs & derivatives/therapeutic use MH - Cardiovascular Diseases/prevention & control MH - Clinical Trials as Topic MH - Diabetes Mellitus, Type 2/*drug therapy/metabolism/physiopathology MH - Dipeptides/therapeutic use MH - Dipeptidyl-Peptidase IV Inhibitors/therapeutic use MH - Exenatide MH - Glucagon-Like Peptide 1/analogs & derivatives/*metabolism/therapeutic use MH - Glucagon-Like Peptide-1 Receptor MH - Humans MH - Hypoglycemic Agents/*therapeutic use MH - Incretins/*therapeutic use MH - Liraglutide MH - Peptides/therapeutic use MH - Pyrazines/therapeutic use MH - Receptors, Glucagon/*agonists MH - Sitagliptin Phosphate MH - Triazoles/therapeutic use MH - Venoms/therapeutic use EDAT- 2011/02/05 06:00 MHDA- 2011/03/23 06:00 CRDT- 2011/02/05 06:00 PHST- 2011/02/05 06:00 [entrez] PHST- 2011/02/05 06:00 [pubmed] PHST- 2011/03/23 06:00 [medline] AID - 10.3810/pgm.2011.01.2245 [doi] PST - ppublish SO - Postgrad Med. 2011 Jan;123(1):53-65. doi: 10.3810/pgm.2011.01.2245.