title: Analysis of the constituents in the rat plasma after oral administration of Yin Chen Hao Tang by UPLC/Q-TOF-MS/MS.
abstract: A UPLC/Q-TOF-MS/MS method for analyzing the constituents in rat plasma after oral administration of Yin Chen Hao Tang (YCHT), a traditional Chinese medical formula, has been established. The UPLC/MS fingerprints of the samples were established first in vitro and in vivo, with 45 compounds in YCHT and 21 compounds in rat plasma after oral administration of YCHT were detected. Of the 45 detected compounds in vitro, 30 were identified, and all of the 21 compounds detected in rat plasma were identified either by comparing the retention time and mass spectrometry data with that of reference compounds or by mass spectrometry analysis and retrieving the reference literatures. Of the identified 21 compounds in rat plasma, 19 were the original form of compounds absorbed from the 45 detected compounds in vitro, 2 were the metabolites of the compounds existed in YCHT. It is concluded that a rapid and validated method has been developed based on UPLC-MS/MS, which shows high sensitivity and resolution that is more suitable for identifying the bioactive constituents in plasma after oral administration of Chinese herbal medicines, and provides helpful chemical information for further pharmacology and active mechanism research on the Chinese medical formula.
authors.affiliation: Department of Pharmacognosy, Heilongjiang University of Chinese Medicine, No. 24 Heping Road, Harbin 150040, PR China. wxj@hljucm.net
authors.forename: Xijun
authors.initials: X
authors.lastname: Wang
authors.forename: Wenjun
authors.initials: W
authors.lastname: Sun
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: Haitao
authors.initials: H
authors.lastname: Lv
authors.forename: Zeming
authors.initials: Z
authors.lastname: Wu
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: Lian
authors.initials: L
authors.lastname: Liu
authors.forename: Hongxin
authors.initials: H
authors.lastname: Cao
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000493:pharmacokinetics; D008297:Male; D008516:Medicine, Chinese Traditional; D051381:Rats; D017208:Rats, Wistar; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D004365:Drugs, Chinese Herbal