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KMID : 0043320120350111945
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Archives of Pharmacal Research
2012 Volume.35 No. 11 p.1945 ~ p.1952
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Comparative study of bioactive constituents in crude and processed Glycyrrhizae radix and their respective metabolic profiles in gastrointestinal tract in vitro by HPLC-DAD and HPLC-ESI/MS analyses
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Huang Wen wu
Wang Meng Yue
Shi Hai ming
Peng Ying
Peng Chong sheng
Zhang Min
Li Yue
Lu Jing
Li Xiao bo
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Abstract
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Two HPLC methods with diode array detection (HPLC-DAD) and electrospray ionization-mass spectrometry (HPLC-ESI/MS), respectively, were developed to investigate the differences of chemical constituents and their metabolism in gastrointestinal tract in vitro between two decoctions of crude and processed Glycyrrhizae radix. Total of eleven constituents (liquiritin apioside, liquiritin, licuraside, isoliquiritin, ononin, glycyrrhizin, liquiritigenin-7,4′-diglucoside, licorice saponin A3, 22β-acetoxylglycyrrhizic acid, licorice saponin G2, and yunganoside E2) were identified in the two decoctions, whereas lower contents of these constituents were usually found in the decoction of processed G. radix. Furthermore, these constituents were metabolized into their respective aglycons in human intestinal bacteria juice, and the metabolism ratios were all higher in processed G. radix decoction. No change was found in artificial gastric or intestinal juice. This study revealed that the processing can alter the contents of main constituents in crude G. radix and their metabolism in gastrointestinal tract, in which intestinal bacteria play an important role in the metabolism of licorice constituents.
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KEYWORD
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Crude Glycyrrhizae radix, Processed Glycyrrhizae radix, Metabolism, Human intestinal bacteria, HPLC-DAD, HPLC-ESI/MS
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