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  • Title: Ginsenoside Rh2 reduces ischemic brain injury in rats.
    Author: Park EK, Choo MK, Oh JK, Ryu JH, Kim DH.
    Journal: Biol Pharm Bull; 2004 Mar; 27(3):433-6. PubMed ID: 14993818.
    Abstract:
    Ginseng was incubated under mildly acidic conditions and its inhibitory effect on a rat ischemia-reperfusion model was investigated. When ginseng was treated with 0.1% hydrochloric acid at 60 degrees C, its protopanaxadiol saponins were transformed to diasteromeric ginsenoside Rg3 and Delta20-ginsenoside Rg3. When the transformed ginseng extract, of which the main component was ginsenosides Rg3, was treated with human intestinal microflora, the main metabolite was ginsenoside Rh2. Orally administered acid-treated ginseng (AG) extract and ginsenoside Rh2 potently protect ischemia-reperfusion brain injury. The ginsenoside Rh2 also inhibited prostaglandin-E2 synthesis in lipopolysaccharide-stimulated RAW264.7 cells, but showed no in vitro antioxidant activity. These results suggest that AG and ginsenoside Rh2 can improve ischemic brain injury.
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