Diabetes Care 27:2628-2635, 2004
© 2004 by the American Diabetes Association, Inc.
Emerging Treatments and Technologies Original Article |
Effects of Exenatide (Exendin-4) on Glycemic Control Over 30 Weeks in Sulfonylurea-Treated Patients With Type 2 Diabetes
John B. Buse, MD, PHD1,
Robert R. Henry, MD2,
Jenny Han, MS3,
Dennis D. Kim, MD3,
Mark S. Fineman, BS3 and
Alain D. Baron, MD3 for the Exenatide-113 Clinical Study Group*
1 Diabetes Care Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina
2 Veterans Administration Medical Center, University of California, San Diego, California
3 Amylin Pharmaceuticals, San Diego, California
Address correspondence and reprint requests to Alain D. Baron, MD, Senior Vice-President, Clinical Research, Amylin Pharmaceuticals, 9360 Towne Centre Dr., Suite 110, San Diego, CA 92121. E-mail: abaron{at}amylin.com
OBJECTIVEThis study evaluated the ability of the incretin mimetic exenatide (exendin-4) to improve glycemic control in patients with type 2 diabetes failing maximally effective doses of a sulfonylurea as monotherapy.
RESEARCH DESIGN AND METHODSThis was a triple-blind, placebo-controlled, 30-week study conducted at 101 sites in the U.S. After a 4-week, single-blind, placebo lead-in period, 377 subjects were randomized (60% men, age 55 ± 11 years, BMI 33 ± 6 kg/m2, HbA1c 8.6 ± 1.2% [±SD]) and began 4 weeks at 5 µg subcutaneous exenatide twice daily (before breakfast and dinner; arms A and B) or placebo. Subsequently, subjects in arm B were escalated to 10 µg b.i.d. exenatide. All subjects continued sulfonylurea therapy.
RESULTSAt week 30, HbA1c changes from baseline were 0.86 ± 0.11, 0.46 ± 0.12, and 0.12 ± 0.09% (±SE) in the 10-µg, 5-µg, and placebo arms, respectively (adjusted P < 0.001). Of evaluable subjects with baseline HbA1c > 7% (n = 237), 41% (10 µg), 33% (5 µg), and 9% (placebo) achieved HbA1c 7% (P < 0.001). Fasting plasma glucose concentrations decreased in the 10-µg arm compared with placebo (P < 0.05). Subjects in the exenatide arms had dose-dependent progressive weight loss, with an end-of-study loss in the 10-µg exenatide arm of 1.6 ± 0.3 kg from baseline (P < 0.05 vs. placebo). The most frequent adverse events were generally mild or moderate and gastrointestinal in nature. No severe hypoglycemia was observed.
CONCLUSIONSExenatide significantly reduced HbA1c in patients with type 2 diabetes failing maximally effective doses of a sulfonylurea. Exenatide was generally well tolerated and was associated with weight loss.
Abbreviations: GLP, glucagon-like peptide ITT, intent to treat

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