UHPLC-ESI-MS Analysis of Purified Flavonoids Fraction from Stem of Dendrobium denneaum Paxt and Its Preliminary Study in Inducing Apoptosis of HepG2 Cells

Evidence-based Complementary and Alternative Medicine : ECAM
Chunhua ZhouGang Wei

Abstract

Dendrobium denneaum paxt., which has been widely used for health prevention in traditional Chinese medicine (TCM), is one of the most popular tonic herbs in China. In order to analyze its flavonoids, characterization and antitumor activity of crude extract and flavonoids rich fractions from D. denneaum paxt. were investigated. Flavonoids extracted from D. denneaum paxt. were clearly enriched in fraction II after determining the total flavonoids content; there were 15 characteristic peaks which have been detected; ultra-high performance liquid chromatography-electrospray ionization/mass spectrometry (UHPLC-ESI-MS/MS) was applied for structural elucidation of compounds. 13 characteristic peaks including flavonoid-O-glycosides and flavonoid-C-glycosides were determined or preliminarily characterized through comparing retention times and UV and MS spectra with standard compounds or documented literature. The antitumor activity of fraction II on human liver cancer cells HepG2 was investigated. MTT assay method was used to test the antiproliferation activity and to confirm the appropriate treatment concentration as well as inducing time. The morphological changes of the apoptosis cells after being induced by fraction II were observed...Continue Reading

References

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Methods Mentioned

BETA
NMR
flow cytometry
fluorescence microscopy

Software Mentioned

SPSS
GraphPad
Prism

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis