Meng Qi

Publications (2)2.73 Total impact

• Article: A novel strategy for target profiling analysis of bioactive phenylethanoid glycosides in Plantago medicinal plants using ultra-performance liquid chromatography coupled with tandem quadrupole mass spectrometry.

  Meng Qi, Aizhen Xiong, Fang Geng, Li Yang, Zhengtao Wang
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  ABSTRACT: Phenylethanoid glycosides are a group of phenolic compounds with diverse biological activities such as hypotensive, diuretic, and hypoglycemic effects. In this study, a target profiling analysis approach using ultra-performance liquid chromatography coupled with tandem quadrupole mass spectrometry (MS) was established on the basis of parent ion scanning for m/z 161, the characteristic product ion for phenylethanoid glycosides. It was successfully employed to discriminate the chemical composition of phenylethanoid glycosides between Plantaginis Herba and Plantaginis Semen, two medicinal parts of Plantago plants, which are widely used as herbal medicine in China. Totally, 34 phenylethanoid glycosides were characterized and tentatively identified by their retention times, MS, and tandem quadrupole MS (MS/MS) data. Combined with chemometrics analysis of principal component analysis and orthogonal projection to latent structural discriminate analysis, eight of them, especially acteoside and plantamajoside, were picked out and contributed to the chemical distinction between Plantaginis Herba and Plantaginis Semen, which might be responsible for the differences in diuretic and hypotensive effects between the two medicinal parts. This new approach for target profiling provides not only a novel idea for specific analysis of active chemical constituents in the same type, but also a promising and reference method for quality evaluation of traditional Chinese medicines.
  Journal of Separation Science 06/2012; 35(12):1470-8. · 2.73 Impact Factor
• Article: [Study on absorption ingredients of Plantaginis semen by in vitro everted intestinal sac method].

  Qin Tan, Jingjing Zhu, Weihao Wang, Zhimin Wang, Jiucheng Cui, Jingjing Kong, Meng Qi, Li Yang
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  ABSTRACT: To establish a method for quick investigating the absorption ingredients of Plantaginis semen and guiding the index selection for its quality control. The absorption of three concentrations of Plantaginis semem was investigated with the in vitro everted intestinal sac (VEIS) model The intestinal sac contents of jejunum and ileum were collected at different time and geniposidic acid was detected by HPLC and LC-MS(n) as the representative marker. Six ingredients could be detected. At different concentrations of Plantaginis semen, geniposidic acid tested by VEIS showed that there was a good linear correlation between the drug absorption from the medium across the intestinal epithelium into the sac contents in various intestines section. The absorption of the gut sacs from 0 to 90 min manifested a significant time-dependent manner. The Ka of geniposidic acid in the jejunum and ileum increased along with the raised dosage of the Plantaginis Semen (P < 0.05), which indicated a passive absorption manner. This method can be used as a tool to investigate the absorption ingredients of Plantaginis Semen. Comparing with the jejunum, the ileum can provide more absorption information faster. The optimal incubation time in intestinal sac was 90 min.
  Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 01/2011; 36(2):150-3.