高麗人参に含まれるNrf2 - ARE経路活性化物質の抽出

  • 川地 隆太
    京都大・院薬・薬品作用解析
  • 三原 憲一
    金氏高麗人参株式会社品質保証・研究開発室
  • 徳田 英昭
    金氏高麗人参株式会社品質保証・研究開発室
  • 泉 安彦
    京都大・院薬・薬品作用解析 神戸薬科大・薬・薬理
  • 久米 利明
    京都大・院薬・薬品作用解析 富山大・院医薬・応用薬理

書誌事項

タイトル別名
  • Extraction of the active compound of Nrf2-ARE pathway derived from Panax ginseng C. A. Meyer

説明

<p>Extraction of the active compound of Nrf2-ARE pathway derived from Panax ginseng C. A. Meyer</p><p>Oxidative stress induced by reactive oxygen species (ROS) generated in the human body is considered as a risk factor of various neurodegenerative diseases. Nrf2-ARE pathway is well-known as biological defensive system against the oxidative stress. In this study, we isolated and identified the Nrf2-ARE activator from Panax ginseng C. A. Meyer and then evaluated its actions against PC12 cells. First, the extract of Panax ginseng C. A. Meyer exhibited high ARE activity by luciferase reporter assay using PC12 cells. Dividing the extract into 9 fractions by reversed-phase HPLC, we determined the ARE activities of each fraction by reporter assay. Based on LC/TOF-MS, the active ingredient responsible for the ARE activity was identified as panaxytriol ((3R,9S,10S)-Heptadec-1-en-4,6-diyne-3,9,10-triol). Importantly, the pretreatment of panaxytriol significantly protected native PC12 cells from 6-OHDA toxicity. Additionally, NQO1 assay revealed that panaxytriol raised NQO1 activity in native PC12 cells. These results suggest that the extract of Panax ginseng C. A. Meyer contains panaxytriol as a Nrf2-ARE activator and has the cytoprotective effect against oxidative stress by inducing some antioxidant enzymes.</p>

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