PMID: 9643450Jun 27, 1998Paper

Effects of the ginsenosides Rg1 and Rb1 on morphine-induced hyperactivity and reinforcement in mice

The Journal of Pharmacy and Pharmacology
H S KimC G Jang

Abstract

Recent studies have demonstrated that ginseng saponin inhibits the hyperactivity and conditioned place-preference response induced by psychostimulants and opiates. This seems to occur by direct or indirect modulation of dopaminergic activity. However, it is not known which components of ginseng saponin are active. These experiments were conducted to determine the effects of the ginsenosides Rb1 and Rg1, major components of the protopanaxadiol and protopanaxatriol fractions of ginseng saponin, on morphine-induced hyperactivity and conditioned place-preference. Morphine-induced hyperactivity, but not apomorphine-induced climbing behaviour, was inhibited by both Rb1 and Rg1. These findings confirm the hypothesis that ginsenosides modulate catecholaminergic activity preferentially at pre-synaptic sites. Morphine-induced conditioned place-preference was inhibited by Rg1, but not by Rb1. It has previously been shown that at low doses Rb1 and Rg1 are equally effective at inhibition of catecholamine secretion at the pre-synaptic site, but that at high doses Rg1 is a more effective inhibitor. This observation might explain our finding that morphine-induced conditioned place-preference was inhibited by Rg1 only. Our findings suggest that...Continue Reading

References

Jun 1, 1979·Japanese Journal of Pharmacology·H SaitoK Takagi
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Citations

Oct 11, 2005·Archives of Pharmacal Research·Hyoung-Chun KimKi-Wan Oh
Jul 19, 2000·Pharmacology, Biochemistry, and Behavior·Z LiX Li
Sep 21, 2000·Journal of Ethnopharmacology·M Davydov, A D Krikorian
Aug 4, 1999·Journal of Ethnopharmacology·H S KimM K Lee
Sep 6, 2005·Biological & Pharmaceutical Bulletin·Hwa-Young ChaKi-Wan Oh
Apr 6, 2001·Nihon yakurigaku zasshi. Folia pharmacologica Japonica·S Tokuyama, M Takahashi
Jan 20, 2009·The American Journal of Drug and Alcohol Abuse·Lin LuThomas R Kosten

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