S-Space College of Medicine/School of Medicine (의과대학/대학원) Pharmacology (약리학전공) Journal Papers (저널논문_약리학전공)
Therapeutic evaluation of sustained-releasing praziquantel (SRP) for clonorchiasis: phase 1 and 2 clinical studies
- Issue Date
- Korean J Parasitol. 2006 Dec;44(4):361-6.
- Adult ; Animals ; Area Under Curve ; Clonorchiasis/*drug therapy ; Clonorchis sinensis/*drug effects/isolation & purification ; Humans ; Male ; Parasite Egg Count ; Anthelmintics/adverse effects/pharmacokinetics/therapeutic use ; Delayed-Action Preparations/pharmacokinetics/therapeutic use ; Praziquantel/adverse effects/pharmacokinetics/therapeutic use
- Sustained-releasing praziquantel (SRP) tablet was designed for single dose treatment regimen of clonorchiasis. A previous pre-clinical study confirmed its sustained-releasing characteristics and a better cure rate than conventional praziquantel (PZQ). In this clinical study, the pharmacokinetics of this SRP tablet were investigated in human volunteers (phase 1; 12 volunteers), and its curative efficacy was examined in clonorchiasis patients (phase 2; 20 volunteers). In the phase 1 clinical study, blood concentrations of both tablets showed wide individual variation. The AUClast of SRP was 497.9 +/- 519.0 ng * hr/ml (mean +/- SD) and PZQ of 628.6 +/- 695.5 ng * hr/ml, and the AUCinf of SRP was 776.0 +/- 538.5 ng * hr/ml and of PZQ 658.6 +/- 709.9 ng * hr/ml. Cmax values of SRP and PZQ were 90.7 +/- 82.2 ng/ml and 214.9 +/- 251.9 ng/ml, and Tmax values were 3.42 +/- 1.43 hr and 1.96 +/- 1.23 hr, respectively. SRP tablets showed similar AUC values, but lower Cmax and longer Tmax values than PZQ. In the phase 2 study, SRP at 30 mg/kg (single dose) achieved a 60% cure rate and a 95.5% egg reduction rate. The cure rate of a single dose SRP was unsatisfactory compared with that of the conventional PZQ dose, but much better than that achieved by a single dose PZQ.
- 0023-4001 (Print)