Pharmacokintics of the Ginkgo Bfollowing Intravenous Administration of Ginkgo B Emulsion in Rats(Analytical Biochemistry)

概要

論文の詳細を見る
Ginkgo B (GB) is an extract from the leaves of Ginkgo biloba, used in the treatment of dementia, cerebral insufficiency or related cognitive decline. In this paper, the main features of the pharmacokinetics of GB emulsion in rats were reviewed and the binding rate of GB to rat plasma and human plasma protein were investigated meanwhile. The concentrations of GB in plasma, tissue, and excretion of rats after i.v. administration of GB were measured using HPLC-ESI-MS. The metabolite was qualitated by LC-MS/MS. Intravenously administered GB was eliminated in a biphasic manner with a prominent initial phase (half-life of 0.3h) followed by a slower terminal phase (half-life of 1.5h). After i.v. 4, 12 and 36mg/kg GB emulsion, the pharmacokinetic parameters from a two compartment model analysis of plasma samples were AUC_<0-τ> (μg・min/ml): 53.7, 165.5 and 649.7; CL (l/min/kg): 0.07, 0.07 and 0.05; V_c (l/kg): 2.27, 3.27 and 2.76, respectively. Peak concentrations generally occurred at 10 min except brain and fat. Tissue concentration then declined by several-fold during 6h although still present in most tissues at 6h. Single intravenous dose was mainly excreted in the urine (40-50%), fece contained less than 30%. The binding rate to rat plasma was little higher than to human plasma, but the difference was negligible. Some metabolites were found in urine and bile through qualitative analysis on the urine and bile by LC-MS/MS.
公益社団法人日本薬学会の論文
2007-01-01

Pharmacokintics of the Ginkgo Bfollowing Intravenous Administration of Ginkgo B Emulsion in Rats(Analytical Biochemistry)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク