Search results
Results from the WOW.Com Content Network
DPP-4 inhibitors and GLP-1. Inhibitors of dipeptidyl peptidase 4 (DPP-4 inhibitors or gliptins) are a class of oral hypoglycemics that block the enzyme dipeptidyl peptidase-4 (DPP-4). They can be used to treat diabetes mellitus type 2. The first agent of the class – sitagliptin – was approved by the FDA in 2006. [1]
GLP-1 receptor signaling in pancreatic alpha cells reduces glucagon secretion, further contributing to glucose lowering. By inhibiting glucagon release, GLP-1 receptor activation helps to maintain glucose homeostasis. Another important function of the GLP-1 receptor is the regulation of gastric emptying.
One of the first reported DPP-4 inhibitor was P32/98 from Merck. It used thiazolidide as the P1-substitute and was the first DPP-4 inhibitor that showed effects in both animals and humans but it was not developed to a market drug due to side effects. Another old inhibitor is DPP-728 from Novartis, where 2-cyanopyrrolidine is used as the P1 ...
Another class of anti-diabetes drugs, DPP-4 inhibitors, work by reducing the breakdown of endogenous GLP-1, and are generally considered less potent than GLP-1 agonists. [3] Some of the metabolic effects of GLP-1 agonists in rodents are mediated via increased synthesis of fibroblast growth factor 21 ( FGF21 ).
Medications based on incretins are used in the treatment of type 2 diabetes mellitus as well as the management of obesity.. Most of the earliest incretin-targeting agents to be approved fell into the class of DPP-4 inhibitors; these inhibit DPP-4 and thus prevent the enzymatic degradation of GLP-1 and GIP.
GLP-1 analogs resulted in weight loss and had more gastrointestinal side-effects, while in general dipeptidyl peptidase-4 (DPP-4) inhibitors were weight-neutral and are associated with increased risk for infection and headache. Both classes appear to present an alternative to other antidiabetic drugs.
DPP-4 is known to cleave a broad range of substrates including growth factors, chemokines, neuropeptides, and vasoactive peptides. [8] [9] The cleaved substrates lose their biological activity in the majority of cases, but in the case of the chemokine RANTES and neuropeptide Y, DPP-4 mediated cleavage leads to a shift in the receptor subtype ...
GLP-1 receptor agonists stimulate insulin secretion by simulating activation of the body's endogenous incretin system. [32] The incretin system acts as an insulin secretion amplifying pathway. [32] DPP-4 inhibitors block DPP-4 activity which increases postprandial incretin hormone concentration, therefore increasing insulin secretion. [32]