Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (10): 2192.doi: 10.7503/cjcu20180080

• Analytical Chemistry • Previous Articles     Next Articles

Effects of Ginseng Polysaccharides on the Metabolism of Ginsenoside Re in vivo and Transformation of Ginsenoside Re in vitro

LI Ruigang1, ZHU Na2, ZHAO Huanxi1, WANG Nan1, SUN Hongmei1, YUE Hao1,*(), LI Jing1,*()   

  1. 1. Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
    2. Qingdao Center Hospital, Qingdao 266042, China
  • Received:2018-01-25 Online:2018-09-14 Published:2018-09-14
  • Contact: YUE Hao,LI Jing E-mail:yuehao@sohu.com;jingli2017@aliyun.com
  • Supported by:
    † Supported by the Science and Technology Development Project of Jilin Province, China(No. 20170307006YY).

Abstract:

To study the effect of ginseng polysaccharides on the absorption of ginsenoside Re metabolite into the blood and the transformation of ginsenoside Re by intestinal microflora in vitro, rapid resolution liquid chromatography coupled with quadruple-time-of-flight mass spectrometry(RRLC/Q-TOF-MS) was performed to investigate the biotransformation process of ginsenoside Re by intestinal microflora in media with and without ginseng polysaccharides, and the pharmacokinetics of the ginsenoside Re metabolite, ginsenoside Rg1, in rats with or without pretreatment with ginseng polysaccharides. For transformation of Re by rat intestinal microflora, five transformed products including ginsenoside Rg1, Rh1, Rg2, F1 and PPT, as well as three transformation pathways were identified. When the intestinal microbiota of rat feces was cultured in vitro, their ginsenoside Re biotransformation activities were significantly induced by ginseng polysaccharides. When ginsenoside Re was orally administered to rats, the peak time(tmax), the maximum plasma concentration(cmax) and area under the plasma drug concentration-time curve(AUC) for the main metabolite, ginsenoside Rg1, were (11.6±6.1) h, (80.1±44.0) ng/mL and (549.3±209.4) ng·h/mL, respectively. When ginsenoside Re was orally administered to rats fed ginseng polysaccharides, tmax, cmax and AUC for ginsenoside Rg1 were (8.2±5.4) h, (98.2±50.6) ng/mL and (691.9±231.2) ng·h/mL, respectively. The results show that ginseng polysaccharides may promote the metabolic conversion of ginsenoside Re to Rg1 and the subsequent absorption of Rg1 in the gastrointestinal tract and may potentiate the pharmacological effects of ginseng.

Key words: Ginsenoside Re, Ginsenoside Rg1, Biotransformation, Intestinal microflora, Pharmacokinetics

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