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  • Title: Exenatide: a novel approach for treatment of type 2 diabetes.
    Author: Mikhail N.
    Journal: South Med J; 2006 Nov; 99(11):1271-9. PubMed ID: 17195423.
    Abstract:
    Exenatide (synthetic exendin-4) is the analog of glucagon-like peptide 1 (GLP-1), the major physiologic incretin. The latter is an intestinal hormone that enhances glucose-induced insulin secretion after meals. In addition, GLP-1 stimulates insulin synthesis, inhibits glucagon secretion, delays gastric emptying, and may promote satiety. These glucoregulatory actions help control plasma glucose in the postprandial period. However, in diabetes, the GLP-1 response to nutrient intake is impaired, leading to exacerbation of postprandial hyperglycemia. Exenatide was recently approved as adjunctive therapy in diabetic patients failing sulfonylureas and/or metformin. In clinical trials lasting 30 weeks, exenatide therapy was associated with moderate reduction in mean hemoglobin A1c (HbA1c) levels of approximately 0.8%, and an average weight loss of approximately 2 kg compared with baseline. Hypoglycemia was generally mild and occurred more commonly when exenatide was used in conjunction with sulfonylureas. The requirement of subcutaneous injections twice a day, and the frequent occurrence of nausea and vomiting, represent the main limitations of exenatide. Nevertheless, this agent may be a useful add-on therapy in obese diabetic patients with suboptimal control as a result of continuing weight gain and/or severe postprandial hyperglycemia. The introduction of GLP-1-based antidiabetic drugs is a novel and promising strategy to treat diabetes.
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