title: Ultra high performance liquid chromatography with tandem mass spectrometry method for the determination of tetrandrine and fangchinoline in rat plasma after oral administration of Fangji Huangqi Tang and Stephania tetrandra S. Moore extracts.
abstract: A rapid, sensitive, and reliable analytical method based on ultra high performance liquid chromatography with tandem mass spectrometry has been developed for the simultaneous determination of fangchinoline and tetrandrine in rat plasma. Plasma samples were pretreated by protein precipitation with acetonitrile. The analysis was performed on a C18 reversed-phase ultra high performance liquid chromatography column (2.1 mm × 100 mm, 3.5 μm, Agilent), and the flow rate was set at 0.4 mL/min. Under the experimental conditions, extraction recoveries from plasma were 68.1-72.8% for fangchinoline and 69.2-76.5% for tetrandrine. The plasma concentrations of tetrandrine and fangchinoline in rats at assigned time points were all successfully detected through exactly validated method. Good linearities were obtained in the range of 0.92-184 ng/mL for tetrandrine and in the range of 0.83-166 ng/mL for fangchinoline. The intra- and interday precisions for both analytes were within 11.1% and the accuracies were within the range of -10.7 to 11.3%. The developed method was then successfully applied to investigate the pharmacokinetic properties of these two alkaloids after oral administration of Stephania tetrandra S. Moore extracts and Fangji Huangqi Tang. The comparative results provided a meaningful basis for a better understanding of the practical value of the compatibility theory of traditional Chinese medicine in the clinic.
authors: College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China; Nanjing Haichang Chinese Medicine Group Corporation, Nanjing, P. R. China.
authors: Xiaoli
authors: X
authors: Wang
authors: Xiao
authors: X
authors: Liu
authors: Hao
authors: H
authors: Cai
authors: Ke
authors: K
authors: Pei
authors: Gang
authors: G
authors: Cao
authors: Xiaoyan
authors: X
authors: Xu
authors: Fa
authors: F
authors: Shi
authors: Baochang
authors: B
authors: Cai
mesh_terms: D000097:Acetonitriles; D000284:Administration, Oral; D000818:Animals; D019540:Area Under Curve; D044182:Benzylisoquinolines / Q000097:blood*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D057230:Limit of Detection; D008297:Male; D010936:Plant Extracts / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry
chemical_list: D000097:Acetonitriles; D044182:Benzylisoquinolines; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; C009438:tetrandrine; C060802:fangchinoline; C032159:acetonitrile
keywords: Fangchinoline; Fangji Huangqi Tang; Pharmacokinetics; Tetrandrine; Ultra high performance liquid chromatography