Pharmacokinetics and Pharmacodynamics of Three Different Formulations of Insulin Aspart: A Randomized, Double-blind, Crossover Study in Men With Type 1 Diabetes
To investigate the pharmacokinetic and pharmacodynamic properties, and safety of a novel formulation of insulin aspart (AT247) versus currently marketed insulin aspart formulations (IAsp and faster IAsp).
RESEARCH DESIGN AND METHODS
This single-center, randomized, double-blind, three-period, crossover study was conducted in 19 men with type 1 diabetes, receiving single dosing of trial products (0.3 U/kg) in a random order on three visits. Pharmacokinetics and pharmacodynamics were assessed during a euglycemic clamp lasting up to 8 hours.
Onset of insulin appearance was earlier for AT247 compared with IAsp (−12 minutes [95% CI −14;−8] p=0.0004) and faster IAsp (−2 minutes [−5;−2] p=0.0003). Onset of action was accelerated compared with IAsp (−23 minutes [−37;−15] p=0.0004) and faster IAsp (−9 minutes [−11;−3] p=0.0006). Within the first 60 minutes, a higher exposure was observed for AT247 compared with IAsp (AUCAsp,0-60min: treatment ratio vs IAsp 2.3 [1.9;2.9]; vs faster IAsp 1.5 [1.3;1.8]), which was underpinned by a greater early glucose-lowering effect (AUCGIR,0-60min: treatment ratio vs IAsp 2.8 [2.0;5.5]; vs faster IAsp 1.7 [1.3;2.3]). Furthermore, an earlier offset of exposure was observed for AT247 compared with IAsp (−32 minutes [−58;−15] p=0.0015) and faster IAsp (−27 minutes [−85;−15] p=0.0017), while duration of glucose-lowering effect, measured by tLate50%GIRmax, did not differ significantly.
AT247 exhibited an earlier insulin appearance, exposure and offset, with corresponding enhanced early glucose-lowering effect compared with IAsp and faster IAsp. It therefore represents a promising candidate in the pursuit for second generation prandial insulin analogs to improve postprandial glycemic control.