Supaglutide, a novel GLP-1-IgG Fc fusion protein, exerts hypoglycemic effects in type 2 diabetic db/db mice and spontaneous diabetic monkeys. In this study, we investigated the pharmacokinetics and pharmacodynamics of supaglutide by single or repeated subcutaneous and intravenous injection (s) in rats and rhesus monkeys. We found that the half-life of supaglutide at 0.1 mg/kg in rhesus monkeys was 39.7 hours and 35.8 hours upon subcutaneous or intravenous administration, respectively. The plasma supaglutide peaked at 8-10 hours, while the plasma drug exposure levels increased with the increase of dose, showing approximately a linear pharmacokinetic characteristic. The elimination kinetics was similar between subcutaneous (∼0.025 in rats and ∼0.018 in monkeys) and intravenous administration (0.021 in rats and 0.020 in monkeys) , whereas the bioavailability was found to be 31.1% in rats and 63.9% in monkeys. In monkeys, the marked glucose-lowering effect of a single dose injection of supaglutide peaked at 14-16 hours and lasted for 72 hours. 125I-supaglutide distributed mainly in the serum and organs rich in blood supply. Urine was found to be the primary excretion route of supaglutide, following by feces, but the least by bile. Our results demonstrate that supaglutide has an excellent pharmacokinetic profile with prolonged hypoglycemic effects and is a potential weekly dosing therapeutic agent for the treatment of type 2 diabetes.
Y. Liao: None. A. Ma: None. Z. Wang: None. Y. Zhou: None. L. Zhang: None. L. Liu: None. N. Zhang: None. G. J. Prud’homme: None. Q. Wang: None.