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Journal of chromatography. B, Analytical technologies in the biomedical and life sciences

Simultaneous determination of ginsenoside (G-Re, G-Rg1, G-Rg2, G-F1, G-Rh1) and protopanaxatriol in human plasma and urine by LC-MS/MS and its application in a pharmacokinetics study of G-Re in volunteers.


PMID 21704572

Abstract

Ginsenoside Re (G-Re) improved the memory function of experimental animals in a preclinical study. Several types of saponins including G-Rg1, G-Rg2, G-F1, G-Rh1, and protopanaxatriol (PPT) may be the metabolites of G-Re according to reports from preclinical trials. In order to support a study of the pharmacokinetics of G-Re, an analytical method for G-Re and the co-detection of its probable metabolites using liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed and validated. Solid phase extraction was utilized in the sample preparation. Separation of the analytes was achieved using a gradient elution (0.05% formic acid-methanol-acetonitrile, each organic phase containing 0.05% formic acid) at a flow rate of 0.3 mL/min with a retention time of approximately 2.88 min for G-Re. Data were acquired in the multiple reaction mode (MRM) and the linear range of the standard curve of plasma and urine samples for G-Re was 0.05-20 ng/mL with r(2)≥0.99. In the analysis of probable metabolites, G-Re, G-Rg1, G-F1, G-Rh1 and PPT were all detected in samples; however, G-Rg2 was not detected.

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P0034 20S-Protopanaxatriol
C30H52O4