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  • Title: Comparison of pharmacokinetics and dynamics of the long-acting insulin analogs glargine and detemir at steady state in type 1 diabetes: a double-blind, randomized, crossover study.
    Author: Porcellati F, Rossetti P, Busciantella NR, Marzotti S, Lucidi P, Luzio S, Owens DR, Bolli GB, Fanelli CG.
    Journal: Diabetes Care; 2007 Oct; 30(10):2447-52. PubMed ID: 17623819.
    Abstract:
    OBJECTIVE: To compare pharmacokinetics and pharmacodynamics of insulin analogs glargine and detemir, 24 subjects with type 1 diabetes (aged 38 +/- 10 years, BMI 22.4 +/- 1.6 kg/m2, and A1C 7.2 +/- 0.7%) were studied after a 2-week treatment with either glargine or detemir once daily (randomized, double-blind, crossover study). RESEARCH DESIGN AND METHODS: Plasma glucose was clamped at 100 mg/dl for 24 h after subcutaneous injection of 0.35 unit/kg. The primary end point was end of action (time at which plasma glucose was >150 mg/dl). RESULTS: With glargine, plasma glucose remained at 103 +/- 3.6 mg/dl up to 24 h, and all subjects completed the study. Plasma glucose increased progressively after 16 h with detemir, and only eight subjects (33%) completed the study with plasma glucose <180 mg/dl. Glucose infusion rate (GIR) was similar with detemir and glargine for 12 h, after which it decreased more rapidly with detemir (P < 0.001). Estimated total insulin activity (GIR area under the curve [AUC](0-end of GIR)) was 1,412 +/- 662 and 915 +/- 225 mg/kg (glargine vs. detemir, P < 0.05), with median time of end of action at 24 and 17.5 h (glargine vs. detemir, P < 0.001). The antilipolytic action of detemir was lower than that of glargine (AUC free fatty acids(0-24 h) 11 +/- 1.7 vs. 8 +/- 2.8 mmol/l, respectively, P < 0.001). CONCLUSIONS: Detemir has effects similar to those of glargine during the initial 12 h after administration, but effects are lower during 12-24 h.
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