| Description: |
3-O-Acetyl-16 alpha -hydroxytrametenolic acid has inhibitory activities against AAPH-induced hemolysis of red blood cells, it shows a strong inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate-induced inflammation in mice. 3-O-Acetyl-16 alpha-hydroxytrametenolic acid markedly inhibited the promoting effect of 12-O-tetradecanoylphorbol-13-acetate (1 microgram/mouse) on skin tumor formation following initiation with 7,12-dimethylbenz[a]anthracene (50 micrograms/mouse). |
| Targets: |
Immunology & Inflammation related |
| In vitro: |
| Phytother Res. 2003 Feb;17(2):160-2. | | Inhibitory effects of triterpenes isolated from Hoelen on free radical-induced lysis of red blood cells.[Pubmed: 12601680 ] | Hoelen, sclederma of Poria cocos Wolf, has long been used as a sedative and diuretic in traditional medicine. Formerly, we demonstrated that Hoelen in vitro protects red blood cells from AAPH-induced hemolysis.
METHODS AND RESULTS:
In this study, tests were carried out to identify the main ingredient of Hoelen that has the scavenging effect on free-radicals. Triterpene carboxylic acids isolated from the methanol extract of Hoelen, i.e. pachymic acid, polyporenic acid, 3-epidehydrotumulosic acid, 3beta-hydroxylanosta-7,9(11), 24-trien-21-oic acid and 3-O-Acetyl-16 alpha-hydroxytrametenolic acid, were found to have inhibitory activities against AAPH-induced lysis of red blood cells. |
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| In vivo: |
| Oncology. 1996 Sep-Oct;53(5):382-5. | | Inhibitory effects of lanostane-type triterpene acids, the components of Poria cocos, on tumor promotion by 12-O-tetradecanoylphorbol-13-acetate in two-stage carcinogenesis in mouse skin.[Pubmed: 8784472] | Pachymic acid, 3-O-Acetyl-16 alpha-hydroxytrametenolic acid, and poricoic acid B had been isolated from the sclerotium of Poria cocos Wolf.
METHODS AND RESULTS:
These compounds showed a strong inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate-induced inflammation in mice. At 0.2 mumol/mouse, these compounds markedly inhibited the promoting effect of 12-O-tetradecanoylphorbol-13-acetate (1 microgram/mouse) on skin tumor formation following initiation with 7,12-dimethylbenz[a]anthracene (50 micrograms/mouse). |
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