銀杏內酯類化合物在大鼠體內的絕對生物利用度研究
藥代動力學
作者:司海紅 耿婷 孫曉萍 趙潔 薛佳 李豔靜 黃文哲 丁崗 王振中 蕭偉
[摘要]研究銀杏內酯A(GA)、銀杏內酯B(GB)和白果內酯(BB)在大鼠體內的藥動學特征及其絕對生物利用度。該實驗建立了檢測大鼠血漿中GA,GB,BB的LC-MS/MS分析方法,考察大鼠經口服(ig)和靜脈注射(iv)給藥後血漿中3種銀杏內酯類化合物的血藥濃度,采用DAS 2.0藥動學處理軟件,計算GA,GB,BB的藥動學參數及其絕對生物利用度。結果顯示,GA,GB,BB經大鼠注射給藥後的Cmax分別為(513.9±116.9),(701.3±76.0),(5 255.6±476.8) μg·L-1,AUC0-t分別為(960.9±268.5),(779.5±140.6),(7 409.3±1 181.1) μg·h·L-1;灌胃給藥後的Cmax分別為(522.9±39.9),(146.8±31.6),(2 711.9±588.9) μg·L-1,AUC0-t分別為(1 760.4±300.7),(636.6±180.3),(16 651.4±1 306.5) μg·h·L-1。GA,GB,BB在大鼠體內的的絕對生物利用度分別為(61.1±10.4)%,(27.2±7.7)%,(56.2±4.4)%。該實驗所建立的方法專屬性好,靈敏度高,可用於GA,GB,BB在大鼠體內的藥代動力學和生物利用度研究。
[關鍵詞]銀杏內酯類化合物;LC-MS/MS;藥代動力學;絕對生物利用度
Absolute bioavailability of ginkgolide compounds in rats
SI Hai-hong1,2, GENG Ting1,2, SUN Xiao-ping1,2, ZHAO Jie1,2, XUE Jia1,2,
LI Yan-jing1,2, HUANG Wen-zhe1,2, DING Gang1,2, WANG Zhen-zhong1,2, XIAO Wei1,2*
(1. Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang 222001, China;
2. State Key Laboratory of New Technology for Processing Traditional Chinese Medicine, Lianyungang 222001, China)
[Abstract]To investigate the pharmacokinetic characteristics and absolute bioavailability of ginkgolide A (GA), ginkgolide B (GB) and bilobalide (BB) in rats. In this experiment, a high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was established to determine the plasma concentrations of GA, GB and BB in rats after rats were administrated with the three drugs through ig and iv respectively. The main pharmacokinetic parameters and absolute bioavailability of three ginkgolide compounds were obtained by using pharmacokinetic software DAS 2.0. After the inject of GA, GB and BB, the results showed Cmax at (513.9±116.9), (701.3±76.0), (5 255.6±476.8) μg·L-1 and AUC0-24 h of (960.9±268.5), (779.5±140.6), (7 409.3±1 181.1) μg·h·L-1, respectively; after the oral administration, the results showed Cmax at (522.9±39.9), (146.8±31.6), (2 711.9±588.9) μg·L-1 and AUC0-24 h of (1 760.4±300.7), (636.6±180.3), (16 651.4±1 306.5) μg·h·L-1, respectively. The absolute bioavailability of GA, GB and BB in rats was (61.1±10.4)%, (27.2±7.7)%, (56.2±4.4)%, respectively. The method established in this experiment has a good specificity and sensitivity and so can be used to study the pharmacokinetics and absolute bioavailability of GA, GB and BB in rats.
[Key words]ginkgolide compounds; LC-MS/MS; pharmacokinetics; absolute bioavailability
doi:10.4268/cjcmm20151436
銀杏內酯類化合物屬於萜類化合物,由倍半萜內酯和二萜內酯組成,是銀杏葉中一類重要的活性成分。其中白果內酯(bilobalide,BB)屬於倍半萜內酯,銀杏內酯A(ginkgolide A,GA)和銀杏內酯B(ginkgolide B,GB)為二萜類化合物。藥效學研究表明,銀杏內酯類化合物是很強的血小板活化因子(PAF)拮抗劑[1],具有抗炎、抗休克、抗血小板聚集、抗動脈粥樣硬化、保護中樞神經係統、保護缺血損傷及抑製器官排斥等藥理作用[2-3]。基於這些優勢,銀杏內酯類藥物成為國內企業爭相開發的熱門品種。目前,對於銀杏內酯類成分的絕對生物利用度研究也有相關報道[4-6],但缺少銀杏內酯類單體化合物在大鼠體內的絕對生物利用度研究的相關資料。為此,本課題以GA,GB,BB為研究對象,建立了靈敏度好、準確度高的LC-MS/MS定量分析方法,並對各單體化合物在大鼠體內的藥動學特征及其絕對生物利用度進行了研究。