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  • Title: Dose-dependent effects of the once-daily GLP-1 receptor agonist lixisenatide in patients with Type 2 diabetes inadequately controlled with metformin: a randomized, double-blind, placebo-controlled trial.
    Author: Ratner RE, Rosenstock J, Boka G, DRI6012 Study Investigators.
    Journal: Diabet Med; 2010 Sep; 27(9):1024-32. PubMed ID: 20722676.
    Abstract:
    AIMS: To evaluate the dose-response relationship of lixisenatide (AVE0010), a glucagon-like peptide-1 (GLP-1) receptor agonist, in metformin-treated patients with Type 2 diabetes. METHODS: Randomized, double-blind, placebo-controlled, parallel-group, 13 week study of 542 patients with Type 2 diabetes inadequately controlled [glycated haemoglobin (HbA(1c)) > or = 7.0 and < 9.0% (> or = 53 and < 75 mmol/mol)] on metformin (> or = 1000 mg/day) treated with subcutaneous lixisenatide doses of 5, 10, 20 or 30 microg once daily or twice daily or placebo. The primary end-point was change in HbA(1c) from baseline to 13 weeks in the intent-to-treat population. RESULTS: Lixisenatide significantly improved mean HbA(1c) from a baseline of 7.55% (59.0 mmol/mol); respective mean reductions for 5, 10, 20 and 30 microg doses were 0.47, 0.50, 0.69 and 0.76% (5.1, 5.5, 7.5 and 8.3 mmol/mol), on once-daily and 0.65, 0.78, 0.75 and 0.87% (7.1, 8.5, 8.2 and 9.5 mmol/mol) on twice-daily administrations vs. 0.18% (2.0 mmol/mol) with placebo (all P < 0.01 vs. placebo). Target HbA(1c) < 7.0% (53 mmol/mol) at study end was achieved in 68% of patients receiving 20 and 30 microg once-daily lixisenatide vs. 32% receiving placebo (P < 0.0001). Dose-dependent improvements were observed for fasting, postprandial and average self-monitored seven-point blood glucose levels. Weight changes ranged from -2.0 to -3.9 kg with lixisenatide vs. -1.9 kg with placebo. The most frequent adverse event was mild-to-moderate nausea. CONCLUSIONS: Lixisenatide significantly improved glycaemic control in mildly hyperglycaemic patients with Type 2 diabetes on metformin. Dose-response relationships were seen for once- and twice-daily regimens, with similar efficacy levels, with a 20 microg once-daily dose of lixisenatide demonstrating the best efficacy-to-tolerability ratio. This new, once-daily GLP-1 receptor agonist shows promise in the management of Type 2 diabetes to be defined further by ongoing long-term studies.
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