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Enzymatic formation of compound-K from ginsenoside Rb1 by enzyme preparation from cultured mycelia of Armillaria mellea
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Type
Academic journal
Author
Jitendra Upadhyaya (Chonbuk National University) Min-Ji Kim (Chonbuk National University) Young-Hoi Kim (충북대학교) Sung-Ryong Ko (The Korean Society of Ginseng) Hee-Won Park (Korea Ginseng Corporation) Myung-Kon Kim (Chonbuk National University)
Journal
The Korean Society of Ginseng Journal of Ginseng Research Vol.40 No.2 KCI Candidated Journals SCIE
Published
2016.4
Pages
105 - 112 (8page)

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Enzymatic formation of compound-K from ginsenoside Rb1 by enzyme preparation from cultured mycelia of Armillaria mellea
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Background: Minor saponins or human intestinal bacterial metabolites, such as ginsenosides Rg3, F2, Rh2, and compound K, are more pharmacologically active than major saponins, such as ginsenosides Rb1, Rb2, and Rc. In this work, enzymatic hydrolysis of ginsenoside Rb1 was studied using enzyme preparations from cultured mycelia of mushrooms.
Methods: Mycelia of Armillaria mellea, Ganoderma lucidum, Phellinus linteus, Elfvingia applanata, and Pleurotus ostreatus were cultivated in liquid media at 25℃ for 2 wk. Enzyme preparations from cultured mycelia of five mushrooms were obtained by mycelia separation from cultured broth, enzyme extraction, ammonium sulfate (30-80%) precipitation, dialysis, and freeze drying, respectively. The enzyme preparations were used for enzymatic hydrolysis of ginsenoside Rb1.
Results: Among the mushrooms used in this study, the enzyme preparation from cultured mycelia of A. mellea (AMMEP) was found to convert ginsenoside Rb1 into compound K with a high yield, while those from G. lucidum, P. linteus, E. applanata, and P. ostreatus produced remarkable amounts of ginsenoside Rd from ginsenoside Rb1. The enzymatic hydrolysis pathway of ginsenoside Rb1 by AMMEP was Rb1 -> Rd -> F2 -> compound K. The optimum reaction conditions for compound K formation from ginsenoside Rb1 were as follows: reaction time 72-96 h, pH 4.0-4.5, and temperature 45-55℃.
Conclusion: AMMEP can be used to produce the human intestinal bacterial metabolite, compound K, from ginsenoside Rb1 with a high yield and without food safety issues.
#Armillaria mellea #compound K #enzymatic hydrolysis #ginsenoside Rb1

Contents

ABSTRACT
1. Introduction
2. Materials and methods
3. Results and discussion
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References (32)

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[학술지(정기간행물)] - Christensene LP / 2009 / Ginsenosides chemistry, biosynthesis, analysis, and potential health effects / Adv Food Nutr Res 55 : 1 ~ 99 google schola [학술지(정기간행물)] - Liu CY / 2011 / Ginsenoside contents in three different ginseng / J Dalian Polytechnic Univ 30 : 79 ~ 82 google schola [학술지(정기간행물)] - Xu QF / 2005 / Pharmacokinetics and bioavailability of ginsenoside Rb1 and Rg1 from Panax notoginseng in rats / J Ethnopharmacol 84 : 187 ~ 192 google schola [학술지(정기간행물)] - Yu K / 2012 / Absorption, disposition, and pharmacokinetics of saponins from Chinese medicinal herbs: what do we know and what do we need to know more? / Curr Drug Metab 13 : 577 ~ 598 google schola [학술지(정기간행물)] - Hasegawa H / 2004 / Proof of the mysterious efficacy of ginseng: basic and clinical trials: metabolic activation of ginsenoside: deglycosylation by intestinal bacteria and esterification with fatty acid / J Pharmacol Sci 95 : 153 ~ 157 google schola

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