• Archives of Pharmacal Research
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• v.25 no.4
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• pp.428-432
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• 2002

Three new dammarane glycosides were isolated from the processed ginseng (SG; Sun Ginseng). Their structure were determined to be $3{\beta},{\;}12{\beta}-dihydroxydammar-20(21),24-diene-3-O-{\beta}-D-glucopyranosyl(1{\;}{\rightarrow}{\;}2)-{\beta}-D-glucopyranoside;{\;}3{\beta},{\;}12{\beta}-dihydroxydammar-20(21),24-diene-3-O-{\beta}-D-{\;}glucopyranoside{\;}and{\;}3{\beta},6{\alpha},12{\beta}-trihydroxydammar-20(21),24-diene-6-O-{\beta}-D-glucopyranoside$ based on spectroscopic evidences. The compounds were named as ginsenoside $Rk_1,{\;}Rk_2,{\;}and{\;}Rk_3$ respectively.

• Journal of Ginseng Research
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• v.20 no.1
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• pp.23-29
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• 1996

The effect of ginseng glycosides and their aglycones on the thermodynamic characteristics of membranes from dipalmitoylphosphatidylcholine (DPPC) was investigated. Total saponins (TS) from Korean red ginseng, Panax ginseng C.A. Meyer, interacted with the Eel Phase of lipid in the Polar region and did not penetrate the deeper glycerol backbone of lipid molecule. From the all investigated components of TS (aglycons and ginsenosides), only 20-(S)-panaxadiol (PD) had an effect similar to TS. High concentration of TS penetrated in hydrophobic Cl-C8 region. The presence of cholesterol did not influence the interaction of TS with DPPC. An elimination of transition, however, took place at 10~100 $\mu\textrm{g}$/ml of TS. DPPC had a low ability to interact with cholesterol (CHL) as compared with other lecithins except ethanolamine. From our results, only TS and PD, at high concentrations (100 mol%), influenced the phase transition of mixture of DPPC:CHL.

• Archives of Pharmacal Research
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• v.19 no.4
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• pp.335-336
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• 1996

• Journal of Ginseng Research
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• v.2 no.1
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• pp.17-33
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• 1977

Panax Saponin A(PSA) , one of dammarane glycosides of Korean ginseng, was labeled with $^{3}H$ or $^{14}C$ by our Previously reported Procedures of organic synthesis. Tracer studies with $^{3}H$-PSA in wino yielded the following results: 1). Oral and intraperitoneal administration of $^{3}H$-PSA resulted in the rapid appearance and prolonged retention of $^{3}H$-PSA in all organs such as liver, brain, bone marrow and spleen of mice. 2). The amount pi cellular intake of $^{3}H$-PSA was shown to have a certain level of saturation ranging from 0.4mg to 0. 7mg Per 20gm body weight of mice. Administration of $^{3}H$-PSA within the dosage of the saturation point did net give urinary excretion of 3H-PSA. On the contrary, excessive administration of $^{3}H$-PSA resulted in rapid excretion of the substance in the urine of mice.

• Journal of Ginseng Research
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• v.20 no.3
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• pp.269-273
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• 1996

We investigated the effects of ginseng glycosides and their aglycones on processes of single ion channel formation and channel properties. The glycosides, Rg, and Rb, , and their aglycones, 20-(S)-protopanaxatriol (PT) and 20-(S)-protopanaxadiol (PD) increased the membrane permeability for ions. PT, PD, Rg1, and Rb1; at concentrations of 0.5, 3.0, 10.0 and 30.0 $\mu\textrm{g}$/ml respectively; Induced single ion channel fluctuations with the life times in the range of 0.1~1005 in open states and conductances from 5 to 30 pS in 1 M KCI. At high concentrations of these substances, rapid fluctuations of transmembrane ion current with amplitude from hundred pS to dozen nS were observed. Against other substances, ginsenoside Rbl began to increase the membrane conductance at concentration of about 60 $\mu\textrm{g}$/ml without fluctuation of single ion channel. Membranes treated with PT, PD, Rg1 and Rb1 are more permeable to K+, than to Cl while zero current membrane potentials with 10 gradients of KCI were 12, 16, 8, 25 mV respectively. Key words : Membrane conductance, single ion channel, ginsenosides.

• Applied Biological Chemistry
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• v.19 no.4
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• pp.233-242
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• 1976

In this paper, new methods for the determination of the total and the individual saponin glucosides were proposed. One of them was a colorimetric method following Two-dimensional Thin layer chromatography. And the method employing Thinchrograph TFG-10 or Densitorol DMU-33C followed the separation of the saponins by means of a preparative thin layer chromatography. In accordance with the density of the chromatogram of each saponin, Thinchrogram or Densitogram of the individual saponin fraction was plotted and determined.

• Archives of Pharmacal Research
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• v.27 no.8
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• pp.834-839
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• 2004

In human neuroblastoma SK-N-BE(2) cells undergoing apoptotic death induced by ginsenos-ide Rh2, a dammarane glycoside that was isolated from Panax ginseng C. A. Meyer, caspase-1 and caspase-3 were activated. The expression of Bax was increased in the cells treated with ginsenoside Rh2, whereas Bcl-2 expression was not altered. Treatment with caspase-1 inhibi-tor, Ac-YVAD-CMK, or caspase-3 inhibitor, Z-DEVD-FMK, partially inhibited ginsenoside Rh2-induced cell death but almost suppressed the cleavage of the 116 kDa PARP into a 85 kDa fragment. When the levels of p53 were examined in this process, p53 accumulated rapidly in the cells treated early with ginsenoside Rh2. These results suggest that activation of caspase-1 and -3 and the up-regulation of Bax are required in order for apoptotic death of SK-N-BE(2) cells to be induced by ginsenoside Rh2, and p53 plays an important role in the pathways to promote apoptosis.

• Journal of Ginseng Research
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• v.20 no.2
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• pp.168-172
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• 1996

Ginsenoside Rb,, at a concentration of 10 $\mu\textrm{g}$/ml and over, initiated the cycle of oscillation of ion flux in erythrocytes after the cells had been treated with a protonophore, carbonyl cyanide p-trifluoro-methoxyphenyl hydrazone (FCCP) and then with a $Ca^{2+}$ ionophore, A23,3,. Its action was similar to the additional portion of $Ca^{2+}$-ionophore or $Ca^{2+}$ ion to the erythrocytes. Effects of $Rg_1$ and Rf were different from that of Rb,. They did not induce the oscillation. They, however, increased the extracellular $K^{+}$ concentration and pH without returning to the initial state in the erythrocytes processed with FCCP and $A_{23187}$. We established that ginsenosides from 20-(5)-panaxatriol family induced the membrane hyperpolarization in erythrocytes, which was attenuated by the pretreatment of $Rb_1$, a major component of 20-(5)-panaxadiol.