Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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Identification of a novel triterpene saponin from Panax ginseng seeds, pseudoginsenoside RT8, and its antiinflammatory activity

  • Rho, Taewoong (College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea) ;
  • Jeong, Hyun Woo (Amorepacific Corp. R&D Unit) ;
  • Hong, Yong Deog (Amorepacific Corp. R&D Unit) ;
  • Yoon, Keejung (Department of Integrative Biotechnology, Sungkyunkwan University) ;
  • Cho, Jae Youl (Department of Integrative Biotechnology, Sungkyunkwan University) ;
  • Yoon, Kee Dong (College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea)
  • Received : 2018.03.30
  • Accepted : 2018.11.03
  • Published : 2020.01.15
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Abstract

Background: Panax ginseng Meyer (Araliaceae) is a highly valued medicinal plant in Asian regions, especially in Korea, China, and Japan. Chemical and biological studies on P. ginseng have focused primarily on its roots, whereas the seeds remain poorly understood. This study explores the phytochemical and biological properties of compounds from P. ginseng seeds. Methods: P. ginseng seeds were extracted with methanol, and 16 compounds were isolated using various chromatographic methods. The chemical structures of the isolates were determined by spectroscopic data. Antiinflammatory activities were evaluated for triterpene and steroidal saponins using lipopolysaccharide-stimulated RAW264.7 macrophages and THP-1 monocyte leukemia cells. Results: Phytochemical investigation of P. ginseng seeds led to the isolation of a novel triterpene saponin, pseudoginsenoside RT8, along with 15 known compounds. Pseudoginsenoside RT8 exhibited more potent antiinflammatory activity than the other saponins, attenuating lipopolysaccharide-mediated induction of proinflammatory genes such as interleukin-1β, interleukin-6, inducible nitric oxide synthase, cyclooxygenase-2, and matrix metalloproteinase-9, and suppressed reactive oxygen species and nitric oxide generation in a dose-dependent manner. Conclusion: These findings indicate that pseudoginsenoside RT8 has a pharmaceutical potential as an antiinflammatory agent and that P. ginseng seeds are a good natural source for discovering novel bioactive molecules.

Keywords

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