Pharmacokintics of the Ginkgo Bfollowing Intravenous Administration of Ginkgo B Emulsion in Rats
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- Chen Wei-Dong
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University The Hospital of the 17th Metallurgical Construction Company
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- Liang Yan
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University
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- Xie Lin
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University
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- Lu Tong
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University
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- Liu Xiao-Dong
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University
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- Wang Guang-Ji
- Key Lab of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University
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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 0.3 h) followed by a slower terminal phase (half-life of 1.5 h). After i.v. 4, 12 and 36 mg/kg GB emulsion, the pharmacokinetic parameters from a two compartment model analysis of plasma samples were AUC0—τ (μg·min/ml): 53.7, 165.5 and 649.7; CL (l/min/kg): 0.07, 0.07 and 0.05; VC (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 6 h although still present in most tissues at 6 h. 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.
収録刊行物
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- Biological & Pharmaceutical Bulletin
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Biological & Pharmaceutical Bulletin 30 (1), 1-5, 2007
公益社団法人 日本薬学会
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詳細情報 詳細情報について
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- CRID
- 1390282679603904128
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- NII論文ID
- 110006153256
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- NII書誌ID
- AA10885497
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- DOI
- 10.1248/bpb.30.1
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- ISSN
- 13475215
- 09186158
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- NDL書誌ID
- 8589856
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可