[RP-HPLC determination of loganin in mouse plasma and its pharmacokinetics].
OBJECTIVE
To develop a method for determination of loganin in mouse plasma by using high-performance liquid chromatography. The method was employed to study pharmacokinetics of loganin.


METHODS
An RP-C18 was used as the stationary phase. The mobile phase consisted of methanol-water (30:70), at the flow-rate of 0.8 mL.min-1. The UV absorbance detector was set at 240 nm. Plasma samples were treated with solid phase extraction.


RESULTS
The recovery of loganin in mouse plasma was 86.0%-91.5%. The calibration curve in plasma was linear over the range of 0.01-5.00 micrograms.mL-1. The limit of quantitation was 10 ng.mL-1. The RSDs of intra-day and inter-day (n = 5) were less than 15%. The pharmacokinetic parameters were Cmax = 6.8 micrograms.mL-1, Tmax = 30 min, T1/2 alpha = 26.1 min, T1/2 beta = 29.01 min.


CONCLUSIONS
The method is accurate, sensitive and suitable for pharmcokinetic study of loganin. The absorption and elimination of loganin were rapid after ig in mice.
Xie
Yue-sheng
YS
Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China. xieysh@sohu.com
Zhang
Zhen-qing
ZQ
Ruan
Jin-xiu
JX
D000276:Adjuvants, Immunologic / Q000097:blood* / Q000493:pharmacokinetics; D000818:Animals; D019540:Area Under Curve; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D039823:Iridoids / Q000097:blood* / Q000493:pharmacokinetics; D008297:Male; D051379:Mice
D000276:Adjuvants, Immunologic; D039823:Iridoids; C059516:loganin