Abstract
Xiexin decoction (XXD), a classical pyretolytic formulation, is composed of Rhei rhizoma (DH) Radix scutellaria (HQ) and Coptis chinensis (HL), and commonly used in the clinical setting. The aim of this study was to investigate the pharmacokinetic differences between the five anthraquinones it contains (aloe-emodin, rhein, emodin, chrysophanol and physcion) in rats after the oral administration of XXD and after the administration of the different combinations of its constituent herbs. Twenty rats were divided into four groups and randomly administered one of the four extracts: DH, DH and HQ (DH-HQ), DH and HL (DH-HL), and XXD (DH-HQ-HL) via intragastric gavage (i.g.). Anthraquinone concentrations in the plasma were determined by an HPLC technique. Pharmacokinetic parameters were calculated from the plasma concentration time data. Compared with DH alone, the DH-HL combination showed maximum plasma concentration decreased (Cmax) and area under curve (AUC) for the values anthraquinones, and a prolonged eliminatun half life (T(1/2)) for rhein, while the DH-HQ combination showed a decrease Cmax for rein and a prolonged T(1/2) for aloe-emodin and physcion. Finally, XXD (DH-HQ-HL) administration resulted in an increased AUC for all five anthraquinones compared to DH-HL, and increased the total of AUC for rhein, emodin, chrysophanol and physcion compared to DH alone. These results showed that the oral bioavailability of the five anthraquinones was significantly decreased by combining DH with HL, whereas HQ increased the amounts of absorbed anthraquinones (except for aloe-emodin), and weakened the effect of HL which inhibited the absorption of anthraquinones.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: European Journal of Drug Metabolism and Pharmacokinetics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.