Abstract
A valid and sensitive LC-MS–MS method is adopted for pharmacokinetics study of berberine and palmatine in rabbit plasma. After mixing with internal standard tetrahydroberberine, plasma samples were pretreated with 1.5 mL acetonitrile. Chromatographic separation was on a C18 column using a mixture of water (containing 10 mmol L−1 ammonium acetate, pH 3.5) and acetonitrile (50∶50, v/v) as mobile phase. The detection was performed by selected ion monitoring mode via electrospray ionization source operating in the positive ionization mode. The method was linear over the concentration range of 2.0–200.0 ng mL−1 for berberine and 1.0–100.0 ng mL−1 for palmatine. The lowest limits of quantitation (LLOQ) were 2.0 ng mL−1 for berberine and 1.0 ng mL−1 for palmatine. The intra- and inter-day precision values were less than 14.3% and the deviations were within ±11.0%. The fully validated LC-MS–MS method has been successfully applied to a pharmacokinetic study of berberine, palmatine in rabbit plasma after oral administration of Coptidis and coptidis–gardeniae couple extract. The results indicated that the plasma profiles of the two compounds in rabbit confirmed to one-compartment open model and the combinational utilization with Gardeniae could increase the bioavailability of berberine and palmatine, the two major active components of Coptidis.
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Acknowledgment
Financial supports from the National Natural Sciences Foundation of China (No. 20875074,20875075), West Light Foundation of The Chinese Academy of Sciences (No. 2007DF02) and grants from the Administration of Traditional Chinese Medicine of China (No. 207151) and Ministry of Science and Technology of Shaanxi Province (No. 2006kz10-G5).
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Li, X., Liu, H., Li, J. et al. Simultaneous Determination of Berberine and Palmatine in Rabbit Plasma by LC-MS–MS and Its Application in Pharmacokinetic Study After Oral Administration of Coptidis and Coptidis–Gardeniae Couple Extract. Chroma 70, 1113–1119 (2009). https://doi.org/10.1365/s10337-009-1308-4
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DOI: https://doi.org/10.1365/s10337-009-1308-4