title: A simple and sensitive HPLC-ESI-MS/MS method for the determination of andrographolide in human plasma.
abstract: A liquid chromatography-electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS) method for the determination of andrographolide in human plasma was established. Dehydroandrographolide was used as the internal standard (I.S.). The plasma samples were deproteinized with methanol and separated on a Hanbon C(18) column with a mobile phase of methanol-water (70:30, v/v). HPLC-ESI-MS/MS was performed in the selected ion monitoring (SIM) mode using target ions at [M-H(2)O-H](-), m/z 331.1 for andrographolide and [M-H](-), m/z 331.1 for the I.S. Calibration curve was linear over the range of 1.0-150.0ng/mL. The chromatographic separation was achieved in less than 6.5min. The lower limits of quantification (LLOQ) was 1.0ng/mL. The intra and inter-run precisions were less than 6.95 and 7.22%, respectively. The method was successfully applied to determine the plasma concentrations of andrographolide in Chinese volunteers.
authors.affiliation: Department of Pharmacology, NanJing Traditional Chinese medicine University, Nanjing 210046, China.
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.forename: Da-wei
authors.initials: DW
authors.lastname: Xiao
authors.forename: Sheng
authors.initials: S
authors.lastname: Lou
authors.forename: Jian-jun
authors.initials: JJ
authors.lastname: Zou
authors.forename: Yu-bing
authors.initials: YB
authors.lastname: Zhu
authors.forename: Hong-wei
authors.initials: HW
authors.lastname: Fan
authors.forename: Guang-ji
authors.initials: GJ
authors.lastname: Wang
mesh_terms: D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000097:blood / Q000737:chemistry / Q000493:pharmacokinetics; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004224:Diterpenes / Q000008:administration & dosage / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D004355:Drug Stability; D006801:Humans; D008297:Male; D012015:Reference Standards; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000893:Anti-Inflammatory Agents; D004224:Diterpenes; C030419:andrographolide; C478098:dehydroandrographolide