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Molecules 2014-Jul

Biotransformation and in vitro metabolic profile of bioactive extracts from a traditional Miao-nationality herbal medicine, Polygonum capitatum.

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Krækjan er vistuð á klemmuspjaldið
Chi-Yu He
Jie Fu
Jing-Yi Ma
Ru Feng
Xiang-Shan Tan
Min Huang
Jia-Wen Shou
Zhen-Xiong Zhao
Xiao-Yang Li
Xian-Feng Zhang

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Útdráttur

Polygonum capitatum Buch.-Ham.ex D. Don, a traditional Miao-nationality herbal medicine, has been widely used in the treatment of various urologic disorders. Recent pharmacological studies demonstrated that a pure compound, FR429, isolated from the ethanol extracts of P. capitatum could selectively inhibit the growth of four hepatocellular carcinoma (HCC) cell lines in a dose-dependent manner. Thus, P. capitatum probably exhibits potential antitumor activity. However, there is very little information on the metabolism of substances present in P. capitatum extracts. In this study, gallic acid, quercetrin, ethanol extracts and ethyl acetate fraction of ethnolic extract (EtOAc fraction) of P. capitatum were cultured anaerobically with rat intestinal bacteria. A highly sensitive and selective liquid chromatography electrospray ionization-ion trap-time of fight mass spectrometry (LC/MSn-IT-TOF) technique was employed to identify and characterize the resulting metabolites. A total of 22 metabolites (M1-M22), including tannins, phenolic acids and flavonoids, were detected and characterized. The overall results demonstrated that the intestinal bacteria played an important role in the metabolism of P. capitatum, and the main metabolic pathways were hydrolysis, reduction and oxidation reactions. Our results provided a basis for the estimation of the metabolic transformation of P. capitatum in vivo.

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