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出 处:《中国药房》2008年第16期1220-1222,共3页China Pharmacy
摘 要:目的:建立测定大鼠血浆中咖啡酸浓度的高效液相色谱法,并用于药动学研究。方法:测定大鼠灌胃与静脉注射给药后咖啡酸的血药浓度,采用药动学程序Topfit2.0进行统计处理,计算非室模型药动学参数。结果:大鼠灌胃给药后咖啡酸的主要药动学参数Cmax为(0.56±0.12)μg·mL^-1,tmax为(0.18±0.04)h,t1/2为(0.67±0.12)h,k。为(1.05±0.20)h^-1,AUC(0-t)为(0.34±0.05)μg·h·mL^-1;大鼠静脉注射给药后t1/2为(0.45±0.05)h,k。为(1.55±0.18)h^-1,AUC(0-t)为(9.07±2.24)μg·h·mL^-1.结论:大鼠灌胃给予咖啡酸后,吸收迅速,消除半衰期较短,其绝对生物利用度较低。OBJECTIVE: To establish a HPLC method for the determination of serum concentration of caffeic acid in rats and which was applied to the pharmacokinetic study of caffeic acid. METHODS: The concentrations of caffeic acid in rats were determined after intragastric (ig) administration or intravenous (iv) administration of 50 mg · kg ^-1 caffeic acid and the pharmacokinetic parameters of caffeic acid analyzed by Topfit 2.0. RESULTS: The main pharmacokinetic parameters of caffeic acid after ig administration of caffeic acid were as follows: Cmax: (0.56±0.12)μg·mL^-1; tmax: (0.18±0.04)h; t1/2: (0.67±0.12) h; ke: (1.05±0.20) h^-1; AUC(0-t): (0.34±0.05) μg · h · mL^-1. The main pharmacokinetic parameters of caffeic acid via iv administration were as follows: t1/2: (0.45±0.05) h; ke: (1.55±0.18) h ^-1; AUC(0-t): (9.07±2.24) μg ·h · mL^-1. CONCLUSION: Administered intragastrically, caffeic acid was characterized by rapid absorption, short elimination half life (t 1/2) and low absolute bioavailability in rats.
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