Prodipine, a diphenyl-phosphonate derivative. The IC50s of Prodipine for purified and plasma Dipeptidyl peptidase IV (DPP IV) from the rabbit are 4.5 μM and 30 μM, respectively.
Prodipine, a diphenyl-phosphonate derivative selected from a group of slow-binding irreversible inhibitors of this enzyme. The IC50 values of Prodipine for purified and plasma DPP IV from the rabbit are 4.5 μM and 30 μM, respectively[1].
Male rabbits weighing 3-4 kg receive a single intravenous injection with 10 mg Prodipine or saline. After 1 hr, plasma DPP IV activity has decreased to less than 20% of the preinjection value and remaines unchanged during a 24 hr observation period. A profound and long-lasting inhibition of plasma DPP IV activity is observed in the treated animals (1, 5 or 10 mg). It takes 5 to 8 days to reach half of the pretreatment DPP IV activity and generally more than 20 days for a complete recovery[1].
[1]. De Meester I, et al. In vivo inhibition of dipeptidyl peptidase IV activity by pro-pro-diphenyl-phosphonate (Prodipine). Biochem Pharmacol. 1997 Jul 1;54(1):173-9.