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      SCIE SCOPUS KCI등재

      Effects of Ginsenoside Metabolites on GABA<SUB>A</SUB> Receptor-Mediated Ion Currents

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      https://www.riss.kr/link?id=A60017453

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      다국어 초록 (Multilingual Abstract)

      In a previous report, we demonstrated that ginsenoside Rc, one of major ginsenosides from Panax ginseng, enhances γ-aminobutyric acid (GABA) receptorA (GABAA)-mediated ion channel currents. However, little is known about the effects of ginsenoside metabolites on GABAA receptor channel activity. The present study investigated the effects of ginsenoside metabolites on human recombinant GABAA receptor (α₁β₁γ2s) channel activity expressed in Xenopus oocytes using a two-electrode voltage clamp technique. M4, a metabolite of protopanaxatriol ginsenosides, more potently inhibited the GABA-induced inward peak current (IGABA) than protopanaxadiol (PPD), a metabolite of PPD ginsenosides. The effect of M4 and PPD on IGABA was both concentration-dependent and reversible. The half-inhibitory concentration (IC??) values of M4 and PPD were 17.1±2.2 and 23.1±8.6 μM, respectively. The inhibition of IGABA by M4 and PPD was voltage-independent and non-competitive. This study implies that the regulation of GABAA receptor channel activity by ginsenoside metabolites differs from that of ginsenosides.
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      In a previous report, we demonstrated that ginsenoside Rc, one of major ginsenosides from Panax ginseng, enhances γ-aminobutyric acid (GABA) receptorA (GABAA)-mediated ion channel currents. However, little is known about the effects of ginsenoside me...

      In a previous report, we demonstrated that ginsenoside Rc, one of major ginsenosides from Panax ginseng, enhances γ-aminobutyric acid (GABA) receptorA (GABAA)-mediated ion channel currents. However, little is known about the effects of ginsenoside metabolites on GABAA receptor channel activity. The present study investigated the effects of ginsenoside metabolites on human recombinant GABAA receptor (α₁β₁γ2s) channel activity expressed in Xenopus oocytes using a two-electrode voltage clamp technique. M4, a metabolite of protopanaxatriol ginsenosides, more potently inhibited the GABA-induced inward peak current (IGABA) than protopanaxadiol (PPD), a metabolite of PPD ginsenosides. The effect of M4 and PPD on IGABA was both concentration-dependent and reversible. The half-inhibitory concentration (IC??) values of M4 and PPD were 17.1±2.2 and 23.1±8.6 μM, respectively. The inhibition of IGABA by M4 and PPD was voltage-independent and non-competitive. This study implies that the regulation of GABAA receptor channel activity by ginsenoside metabolites differs from that of ginsenosides.

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      목차 (Table of Contents)

      • INTRODUCTION
      • MATERIALS AND METHODS
      • RESULTS AND DISCUSSION
      • ACKNOWLEDGEMENTS
      • REFERENCES
      • INTRODUCTION
      • MATERIALS AND METHODS
      • RESULTS AND DISCUSSION
      • ACKNOWLEDGEMENTS
      • REFERENCES
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