• Title/Summary/Keyword: biotransformation.

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Endocrine Disrupters

  • Lee Jung Ran;Choi Jeongeun;Jin Chang Bae;Choi Myung Ja
    • Proceedings of the Korean Society of Food Hygiene and Safety Conference
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    • 2001.10a
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    • pp.155-155
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    • 2001

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Biotransformation of natural polyacetylene in red ginseng by Chaetomium globosum

  • Wang, Bang-Yan;Yang, Xue-Qiong;Hu, Ming;Shi, Li-Jiao;Yin, Hai-Yue;Wu, Ya-Mei;Yang, Ya-Bin;Zhou, Hao;Ding, Zhong-Tao
    • Journal of Ginseng Research
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    • v.44 no.6
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    • pp.770-774
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    • 2020

  • Background: Fermentation has been shown to improve the biological properties of plants and herbs. Specifically, fermentation causes decomposition and/or biotransformation of active metabolites into high-value products. Polyacetylenes are a class of polyketides with a pleiotropic profile of bioactivity. Methods: Column chromatography was used to isolate compounds, and extensive NMR experiments were used to determine their structures. The transformation of polyacetylene in red ginseng (RG) and the production of cazaldehyde B induced by the extract of RG were identified by TLC and HPLC analyses. Results: A new metabolite was isolated from RG fermented by Chaetomium globosum, and this new metabolite can be obtained by the biotransformation of polyacetylene in RG. Panaxytriol was found to exhibit the highest antifungal activity against C. globosum compared with other major ingredients in RG. The fungus C. globosum cultured in RG extract can metabolize panaxytriol to Metabolite A to survive, with no antifungal activity against itself. Metabolites A and B showed obvious inhibition against NO production, with ratios of 42.75 ± 1.60 and 63.95 ± 1.45% at 50 µM, respectively. A higher inhibitory rate on NO production was observed for Metabolite B than for a positive drug. Conclusion: Metabolite A is a rare example of natural polyacetylene biotransformation by microbial fermentation. This biotransformation only occurred in fermented RG. The extract of RG also stimulated the production of a new natural product, cazaldehyde B, from C. globosum. The lactone in Metabolite A can decrease the cytotoxicity, which was deemed to be the intrinsic activity of polyacetylene in ginseng.

  • https://doi.org/10.1016/j.jgr.2019.06.007 인용 PDF KSCI

In vivo metabolism of 2-methylaminoethyl-4,4′-dimethoxy-5,6,5′,6′-dimethylenedioxybiphenyl-2′-carboxy-2-carboxylate (DDB-S) in rats using deutrium labeled compound

  • Lee, Eun-Young;Shin, Myoung-Youp;Lee, Mi-Jin;Jung, Ha-Youn;Son, Jung-Hyun;Kim, Dong-Hyun
    • Proceedings of the PSK Conference
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    • 2003.04a
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    • pp.133.2-134
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    • 2003

  • 2-Methylaminoethyl-4, 4'-dimethoxy-5, 5', 6.6 -dimethylenedioxybiphenyl-2'-carboxy-2-carboxylate (DDB-S), a synthetic compound derived from DDB, has been known to protect liver against carbon tetrachloride-, D-galactosamine-, thioacetamide-, and prednisolone-induced hepatic injury in experimental animals. The metabolism of this compound has been assessed in rats by using liquid chromatography/electrospray tandem mass spectrometry (LC/MS/MS) method. (omitted)

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