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논문 기본 정보

자료유형
학술저널
저자정보
Seong-Bum Park (Kangwon National University) Ju-Hyeon Chun (Kangwon National University) Yong-Wook Ban (Kangwon National University) Jung Yeon Han (Kangwon National University) Yong Eui Choi (Kangwon National University)
저널정보
고려인삼학회 Journal of Ginseng Research Journal of Ginseng Research Vol.40 No.1
발행연도
2016.1
수록면
47 - 54 (8page)

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초록· 키워드

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Background: The roots of Panax ginseng contain noble tetracyclic triterpenoid saponins derived from dammarenediol-II. Dammarene-type ginsenosides are classified into the protopanaxadiol (PPD) and protopanaxatriol (PPT) groups based on their triterpene aglycone structures. Two cytochrome P450 (CYP) genes (CYP716A47 and CYP716A53v2) are critical for the production of PPD and PPT aglycones, respectively. CYP716A53v2 is a protopanaxadiol 6-hydroxylase that catalyzes PPT production from PPD in P. ginseng.
Methods: We constructed transgenic P. ginseng lines overexpressing or silencing (via RNA interference) the CYP716A53v2 gene and analyzed changes in their ginsenoside profiles.
Result: Overexpression of CYP716A53v2 led to increased accumulation of CYP716A53v2 mRNA in all transgenic roots compared to nontransgenic roots. Conversely, silencing of CYP716A53v2 mRNA in RNAi transgenic roots resulted in reduced CYP716A53v2 transcription. HPLC analysis revealed that transgenic roots overexpressing CYP716A53v2 contained higher levels of PPT-group ginsenosides (Rg<SUB>1</SUB>, Re, and Rf) but lower levels of PPD-group ginsenosides (Rb1, Rc, Rb<SUB>2</SUB>, and Rd). By contrast, RNAi transgenic roots contained lower levels of PPT-group compounds and higher levels of PPD-group compounds.
Conclusion: The production of PPD- and PPT-group ginsenosides can be altered by changing the expression of CYP716A53v2 in transgenic P. ginseng. The biological activities of PPD-group ginsenosides are known to differ from those of the PPT group. Thus, increasing or decreasing the levels of PPT-group ginsenosides in transgenic P. ginseng may yield new medicinal uses for transgenic P. ginseng.

목차

ABSTRACT
1. Introduction
2. Materials and methods
3. Results
4. Discussion
References

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