ABSTRACT
Objective To study the relative bioavailability after ig rats with Ophiopogon japonicus saponin enteric microsphere in single-dose so as to give directly preparation quality evaluation. Methods(Establishing the) analysis method of HPLC-MS and dealing with the blood sample by solid phase extraction. Determining the diosgenin concentration in plasma after ig Ophiopogon japonicas saponin enteric microsphere and the suspension as comparison in single-dose, and calculating pharmacokinetic parameters and relative bioavailability. Results C_(max), t_(max), and AUC_(0-72) were (637.81?17.23) ng/mL, (4.0?0.0) h, and 7 840.01?412.03, respectively. Conclusion The characteristics of absorption, distribution, and elimination are resembled in rats between two preparations by ig in single-dose. The pharmacokinetic parameters are also identical. The relative bioavailability is (91.10?3.44)%.
ABSTRACT
AIM: To determine the low content of Ophiopogon japonicus saponin metabolite in vivo. METHODS: HPLC-MS method of determining rat's metabolite diosgenin in vivo was established after single-dose oral Ophiopogon japonicus saponin enteric microsphere. RESULTS: The detection limit was about 50 ng/mL,Linearity,precision of intra and inter-day and reproducibility of the method were good. CONCLUSION: This method accords with the analysis requirement.It can give an effective measure and foundation for studying TCM saponin bioavailability.