Objective: To compare the pharmacokinetics, pharmacodynamics, and safety of insulin lispro or regular human insulin (RHI) with or without recombinant human hyaluronidase (rHuPH20) administered before a standardized meal.
Research design and methods: In this four-way, crossover study, 22 patients with type 1 diabetes received injections of individually optimized doses of lispro or RHI with and without rHuPH20 before a liquid meal.
Results: With rHuPH20 coadministration, early insulin exposure (0-60 min) increased by 54% (P = 0.0011) for lispro and 206% (P < 0.0001) for RHI compared with the respective insulin alone. Peak blood glucose decreased 26 mg/dL for lispro (P = 0.002) and 24 mg/dL for RHI (P = 0.017), reducing hyperglycemic excursions (area under the curve for blood glucose >140 mg/dL) by 79% (P = 0.09) and 85% (P = 0.049), respectively. Rates of hypoglycemia were comparable for lispro with or without rHuPH20, whereas coadministration of RHI and rHuPH20 reduced hypoglycemia.
Conclusions: Lispro or RHI with rHuPH20 produced earlier and greater peak insulin concentrations and improved postprandial glycemic control.
Trial registration: ClinicalTrials.gov NCT00774800.