| In vitro: |
| Planta Med., 1998, 64(3):233-6. | | Structure-hepatoprotective relationships study of soyasaponins I-IV having soyasapogenol B as aglycone.[Pubmed: 9581521 ] | As a part of our study on the leguminous plants, we investigated the constituents of the aerial parts of Glycine soya.
METHODS AND RESULTS:
We isolated and identified four known saponins, soyasaponins I, II, III, and IV which have the same aglycone, soyasapogenol B. As a part of our studies concerning hepatoprotective drugs, we also examined the hepatoprotective actions of these saponins towards immunologically induced liver injury on primary cultured rat hepatocytes. The action of soyasaponin II was almost comparable with that of soyasaponin I, whereas those of soyasaponin III and Soyasaponin IV were more effective than soyasaponins I and II. This means that the disaccharide group shows greater action than the trisaccharide group. Furthermore, the saponin having a hexosyl unit shows a slightly greater action than that of the pentosyl unit in each disaccharide group or trisaccharide group.
CONCLUSIONS:
Structure-activity relationships suggest that the sugar moiety linked at C-3 may play an important role in hepatoprotective actions of soybean saponins. |
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