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  • Title: Effects of exenatide (exendin-4) on glycemic control over 30 weeks in patients with type 2 diabetes treated with metformin and a sulfonylurea.
    Author: Kendall DM, Riddle MC, Rosenstock J, Zhuang D, Kim DD, Fineman MS, Baron AD.
    Journal: Diabetes Care; 2005 May; 28(5):1083-91. PubMed ID: 15855571.
    Abstract:
    OBJECTIVE: This study evaluated the effects of exenatide, a novel incretin mimetic, in hyperglycemic patients with type 2 diabetes unable to achieve glycemic control with metformin-sulfonylurea combination therapy. RESEARCH DESIGN AND METHODS: A 30-week, double-blind, placebo-controlled study was performed in 733 subjects (aged 55 +/- 10 years, BMI 33.6 +/- 5.7 kg/m(2), A1C 8.5 +/- 1.0%; means +/- SD) randomized to 5 microg subcutaneous exenatide b.i.d. (arms A and B) or placebo for 4 weeks. Thereafter, arm A remained at 5 microg b.i.d. and arm B escalated to 10 microg b.i.d. Subjects continued taking their dose of metformin and were randomized to either maximally effective (MAX) or minimum recommended (MIN) doses of sulfonylurea. RESULTS: Week 30 A1C changes from baseline (+/-SE) were -0.8 +/- 0.1% (10 microg), -0.6 +/- 0.1% (5 microg), and +0.2 +/- 0.1% (placebo; adjusted P < 0.0001 vs. placebo), yielding placebo-adjusted reductions of -1.0% (10 microg) and -0.8% (5 microg). In the evaluable population, exenatide-treated subjects were more likely to achieve A1C < or =7% than placebo-treated subjects (34% [10 microg], 27% [5 microg], and 9% [placebo]; P < 0.0001). Both exenatide arms demonstrated significant weight loss (-1.6 +/- 0.2 kg from baseline each exenatide arm, -0.9 +/- 0.2 kg placebo; P < or = 0.01 vs. placebo). Mild or moderate nausea was the most frequent adverse event. The incidence of mild/moderate hypoglycemia was 28% (10 microg), 19% (5 microg), and 13% (placebo) and appeared lower with MIN than with MAX sulfonylurea treatment. CONCLUSIONS: Exenatide significantly reduced A1C in patients with type 2 diabetes unable to achieve adequate glycemic control with maximally effective doses of combined metformin-sulfonylurea therapy. This improvement in glycemic control was associated with no weight gain and was generally well tolerated.
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