Title:Pharmacokinetics and Tissue Distribution Study of Daphnoretin in Ethanol
Extract from the Roots of Wikstroemia Indica in Rats by a Validated
UPLC-MS/MS Method
Volume: 19
Issue: 4
Author(s): Wenjing Wang, Guo Feng*, Lailai Li, Wei Li, Wen Liu, Zengguang Wu, Hongmei Su, Guanglin Zhu, Chenchen Ren, Xueli Song, Ju Zhang and Zhengyan He
Affiliation:
- Department of Chinese Materia Medica, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
Keywords:
Wikstroemia indica, daphnoretin, pharmacokinetics, tissue distribution, UPLC-MS/MS.
Abstract:
Background: Daphnoretin, as a known bicoumarin compound that contained various
pharmacological activities, was isolated from Wikstroemia indica C.A. Mey (RWI).
Objective: The study aims to investigate the pharmacokinetic characteristics of daphnoretin from RWI
ethanol extracts in rat plasma and to determine daphnetin in rat plasma and various tissues by a rapid,
reliable and sensitive ultra high performance liquid chromatography with tandem mass spectrometry
method.
Methods: The UPLC-MS/MS method was established. Daphnoretin and IS (buspirone) were chromatographed
on an agilent Zorbax XDB-C18 column (2.1 mm × 50 mm, 3.5 μm), and Gradient elution
of acetonitrile-0.15% formic acid in aqueous solution. Quantification was performed using electrospray
ionization in positive ion multiple reaction monitoring mode of the transitions m/z
353.1→179.1 for daphnoretin and m/z 386.3→122.3 for IS.
Results: Good linearity between 5-10000 ng/mL for cyperidin in plasma and tissue samples (r ≥ 0.99)
was resulted. The accuracies of plasma and tissue homogenates ranged from-3.31% to 9.00%, and the
precision was less than 5.78%. After that, the validated method was successfully applied to the pharmacokinetics
and tissue distribution study of daphnoretin after oral administration of ethanol extract
from the roots of RWI to rats.
Conclusion: Daphnoretin was well absorbed in the systemic circulation after oral administration and
was widely distributed in tissues, with the highest concentration in lung tissue. This study is beneficial
to the development and utilization of RWI and provides a reasonable reference for its clinical administration.