Category Archives: General

General posts.

Leaf-specific pathogenesis-related 10 homolog, PgPR-10.3, shows binding affinity with several biologically important molecules

Pathogenesis-related (PR)-10 proteins are small, cytosolic proteins with a similar three-dimensional (3-D) structure. Crystal structures for several PR-10 homologs have similar overall folding patterns with an unusually large internal cavity that is a binding site for biologically important molecules. Although structural information on PR-10 proteins is substantial, understanding of their biological function remains limited. Here, we showed that one of the PgPR-10 homologs, PgPR-10.3, shares binding properties with flavonoids, kinetin, emodin, deoxycholic acid and ginsenoside Re (one of the steroid glycosides).

A Brief Method for the Preparation of Gintonin-Enriched Fraction from Ginseng

Ginseng has been used as a tonic for invigoration of human body. In a previous report, we identified a novel candidate responsible for the tonic role of ginseng, designated gintonin. Gintonin induces [Ca2+]i transient in animal cells via lysophosphatidic acid (LPA) receptor activation. Gintonin-mediated [Ca2+]i transient is linked to anti-Alzheimer’s disease in transgenic Alzheimer’s disease animal model. The previous method for gintonin preparation included multiple steps. The aim of this study is to develop a simple method of gintonin fraction with a high yield.

Enzymatic formation of compound-K from ginsenoside Rb1 by enzyme preparation from cultured mycelia of

Minor saponins or human intestinal bacterial metabolites such as ginsenoside Rg3, F2, Rh2, and compound K are more pharmacologically active than major saponins such as ginsenoside Rb1, Rb2, and Rc. In this study, enzymatic hydrolysis of ginsenoside Rb1 was studied using enzyme preparations from cultured mycelia of mushrooms.

Comparative Phenolic Compounds Profiles and Antioxidative Activity of the Fruit, Leaves, and Roots of Korean Ginseng ( Meyer) According to Cultivation Years

Study on the phenolic compounds profiles and antioxidative activity in ginseng fruit, leaves, and roots depend on the cultivation years have been little reported so far. Hence, this study examined phenolic compounds profiles and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free-radical-scavenging activities in the fruit, leaves, and roots of Korean ginseng (Panax ginseng Meyer) as a function of cultivation years.

Changes in the ginsenoside content during the fermentation process using microbial strains

Red ginseng (RG) is processed from Panax ginseng via several methods including heat treatment, mild acid hydrolysis and microbial conversion to transform the major ginsenosides into minor ginsenosides, which have greater pharmaceutical activities. During the fermentation process using microbial strains in a machine for making red ginseng, a change of composition occurs after heating. Therefore, we confirmed that fermentation had occurred using only microbial strains and evaluated the changes in the ginsenosides and their chemical composition.

Total saponin from Korean red ginseng inhibits binding of adhesive proteins to glycoprotein IIb/IIIa phosphorylation of VASP (Ser) and dephosphorylation of PI3K and Akt

Binding of adhesive proteins (i.e. fibrinogen, fibronectin, vitronectin) to platelet integrin glycoprotein IIb/IIIa (αIIb/β3) by various agonists (thrombin, collagen, ADP) involve in strength of thrombus. This study was carried out to evaluate antiplatelet effect of total saponin from Korean red ginseng (KRG-TS) by investigating whether KRG-TS inhibits thrombin-induced binding of fibrinogen and fibronectin to αIIb/β3.

Changes in the contents of prosapogenin in Red ginseng () depending on the extracting conditions

This study compared the contents of prosapogenin depending on the extracting conditions of Red ginseng to provide basic information for developing Red ginseng-based functional foods. The content of ginsenosides Rg3 reached their heights at 24 hrs of extraction, followed by 36 hrs and 72 hrs of extraction at 100°C.

Alteration of saponin composition by overexpression and RNA interference of the protopanaxadiol 6-hydroxylase gene ()

The roots of Panax ginseng contain noble tetracyclic triterpenoid saponins derived from dammarenediol-II. Dammarene-type ginsenosides are classified into the protopanaxadiol (PPD) and protopanaxatriol (PPT) groups based on their triterpene aglycone structures. Two cytochrome P450 (CYP) genes (CYP716A47 and CYP716A53v2) are critical for the production of PPD and PPT aglycones, respectively. CYP716A53v2 is a protopanaxadiol 6-hydroxylase that catalyzes PPT production from PPD in P. ginseng.