Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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Effects of Korean Red Ginseng extract on tissue plasminogen activator and plasminogen activator inhibitor-1 expression in cultured rat primary astrocytes

  • Ko, Hyun Myung (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Joo, So Hyun (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Kim, Pitna (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Park, Jin Hee (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Kim, Hee Jin (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Bahn, Geon Ho (Department of Neuropsychiatry, School of Medicine, Kyung Hee University) ;
  • Kim, Hahn Young (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Lee, Jongmin (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Han, Seol-Heui (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Shin, Chan Young (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University) ;
  • Park, Seung Hwa (Department of Neuroscience, School of Medicine and Neuroscience Research Center, Institute SMART-IABS, Konkuk University)
  • Received : 2013.03.15
  • Accepted : 2013.05.24
  • Published : 2013.10.15
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Abstract

Korean Red Ginseng (KRG) is an oriental herbal preparation obtained from Panax ginseng Meyer (Araliaceae). To expand our understanding of the action of KRG on central nervous system (CNS) function, we examined the effects of KRG on tissue plasminogen activator (tPA)/plasminogen activator inhibitor-1 (PAI-1) expression in rat primary astrocytes. KRG extract was treated in cultured rat primary astrocytes and neuron in a concentration range of 0.1 to 1.0 mg/mL and the expression of functional tPA/PAI-1 was examined by casein zymography, Western blot and reverse transcription-polymerase chain reaction. KRG extracts increased PAI-1 expression in rat primary astrocytes in a concentration dependent manner (0.1 to 1.0 mg/mL) without affecting the expression of tPA itself. Treatment of 1.0 mg/mL KRG increased PAI-1 protein expression in rat primary astrocytes to $319.3{\pm}65.9%$ as compared with control. The increased PAI-1 expression mediated the overall decrease in tPA activity in rat primary astrocytes. Due to the lack of PAI-1 expression in neuron, KRG did not affect tPA activity in neuron. KRG treatment induced a concentration dependent activation of PI3K, p38, ERK1/2, and JNK in rat primary astrocytes and treatment of PI3K or MAPK inhibitors such as LY294002, U0126, SB203580, and SP600125 (10 ${\mu}M$ each), significantly inhibited 1.0 mg/mL KRG-induced expression of PAI-1 and down-regulation of tPA activity in rat primary astrocytes. Furthermore, compound K but not other ginsenosides such as Rb1 and Rg1 induced PAI-1 expression. KRG-induced up-regulation of PAI-1 in astrocytes may play important role in the regulation of overall tPA activity in brain, which might underlie some of the beneficial effects of KRG on CNS such as neuroprotection in ischemia and brain damaging condition as well as prevention or recovery from addiction.

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