High performance liquid chromatography-mass spectrometry analysis for rat metabolism and pharmacokinetic studies of lithospermic acid B from danshen

Liang Cui, Wan Chan, Jian Lin Wu, Zhi Hong JIANG, Kelvin Chan, Zongwei CAI*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Metabolism and pharmacokinetic studies on rat were conducted for lithospermic acid B, one of the components from Radix Salviae Miltiorrhizae (danshen) that shows many bioactivities. Liquid chromatography-electrospray ionization mass spectrometry method was applied for the determination of lithospermic acid B and its metabolites in samples from in vitro and in vivo metabolism studies. Rat plasma samples collected after intravenous administration were analyzed for obtaining pharmacokinetic data of lithospermic acid B. Four O-methylated metabolites, namely one monomethyl-, two dimethyl- and one trimethyl-lithospermic acid B, were detected when lithospermic acid B was incubated in rat hepatic cytosol. These four metabolites were also detected in rat bile, plasma and feces samples after intravenous administration of lithospermic acid B. The in vitro and in vivo results indicate that the methylation is the main metabolic pathway of lithospermic acid B. The danshen component and its methylated metabolites were excreted to rat bile and feces.

Original languageEnglish
Pages (from-to)1002-1007
Number of pages6
JournalTalanta
Volume75
Issue number4
DOIs
Publication statusPublished - 30 May 2008

Scopus Subject Areas

  • Analytical Chemistry

User-Defined Keywords

  • Danshen
  • Drug metabolism and pharmacokinetics
  • LC-MS
  • Lithospermic acid B
  • Rat

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