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Updated: Aug 20, 2026

An In Ovo Model for Testing Insulin-mimetic Compounds
Published on: April 23, 2018
Incretin mimetics as emerging treatments for type 2 diabetes
Scott V Joy1, Philip T Rodgers, Ann C Scates
1Duke University Medical Center, Durham, NC 27705-0493, USA. joy00002@mc.duke.edu
Objective:
To review the physiology, pharmacology, and clinical efficacy of glucagon-like peptide (GLP-1) and the incretin mimetics exenatide and liraglutide in clinical studies.
Data Sources:
Primary literature obtained via MEDLINE (1966-April 2004) and International Pharmaceutical Abstracts (1970-April 2004) searches; abstracts obtained from meeting sources and manufacturers.
Study Selection And Data Extraction:
All English-language studies and abstracts evaluating GLP-1, exenatide, and liraglutide in the treatment of patients with type 2 diabetes were reviewed. Data from animal studies were also included if human data were not available. Primary and review articles related to the physiology, development, and evaluation of GLP-1s were reviewed.
Data Synthesis:
GLP-1, exenatide (exendin-4, AC2993), and liraglutide (NN2211) are incretin mimetics that have been shown in human studies to be an effective treatment to improve glycemic control in patients with type 2 diabetes. Mechanisms by which these compounds improve glycemic control include enhancing glucose-dependent pancreatic secretion of insulin in response to nutrient intake, inhibiting glucagon secretion, delaying gastric emptying, and promoting early satiety. GLP-1 has been shown to promote pancreatic progenitor cell differentiation and improve beta-cell function and lifespan. Reported adverse effects of exenatide and liraglutide include nausea, vomiting, and transient headache, as well as increased risk of hypoglycemia when used with sulfonylureas.
Conclusions:
Clinical studies show that GLP-1, exenatide, and liraglutide improve glycemic control for patients with type 2 diabetes through unique mechanisms not available with current pharmaceutical products. Ongoing Phase III studies will help to further position these compounds as treatment options for patients with type 2 diabetes.
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