alexa Twelve- and 52-week efficacy of the dipeptidyl peptidase IV inhibitor LAF237 in metformin-treated patients with type 2 diabetes.


Medicinal Chemistry

Author(s): Ahrn B, Gomis R, Standl E, Mills D, Schweizer A

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Abstract OBJECTIVE: To assess the 12- and 52-week efficacy of the dipeptidyl peptidase IV inhibitor LAF237 versus placebo in patients with type 2 diabetes continuing metformin treatment. RESEARCH DESIGN AND METHODS: We conducted a 12-week, randomized, double-blind, placebo-controlled trial in 107 patients with type 2 diabetes with a 40-week extension in those completing the core study and agreeing, together with the investigator, to extend treatment to 1 year. Placebo (n=51) or LAF237 (50 mg once daily, n=56) was added to ongoing metformin treatment (1,500-3,000 mg/day). HbA1c and fasting plasma glucose (FPG) were measured periodically, and standardized meal tests were performed at baseline, week 12, and week 52. RESULTS: In patients randomized to LAF237, baseline HbA1c averaged 7.7 +/- 0.1\% and decreased at week 12 (Delta=-0.6 +/- 0.1\%), whereas HbA1c did not change from a baseline of 7.9 +/- 0.1\% in patients given placebo (between-group difference in DeltaHbA1c=-0.7 +/- 0.1\%, P <0.0001). Mean prandial glucose and FPG were significantly reduced in patients receiving LAF237 versus placebo by 2.2 +/- 0.4 mmol/l (P <0.0001) and 1.2 +/- 0.4 mmol/l (P=0.0057), respectively, but plasma insulin levels were not affected. At end point of the extension, the between-group differences in change in mean prandial glucose, insulin, and FPG were -2.4 +/- 0.6 mmol/l (P=0.0001), 40 +/- 16 pmol/l (P=0.0153), and -1.1 +/- 0.5 mmol/l (P=0.0312), respectively. HbA1c did not change from week 12 to week 52 in LAF237-treated patients (n=42) but increased in participants given placebo (n=29). The between-group difference in DeltaHbA1c after 1 year was -1.1 +/- 0.2\% (P <0.0001). CONCLUSIONS: Data from this study demonstrate that LAF237 effectively prevents deterioration of glycemic control when added to metformin monotherapy in type 2 diabetes.
This article was published in Diabetes Care and referenced in Medicinal Chemistry

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