Antioxidation properties and mechanism of action of dihydromyricetin from Ampelopsis grossedentata / 药学学报
Acta Pharmaceutica Sinica
; (12): 241-244, 2003.
Article
in English
| WPRIM (Western Pacific)
| ID: wpr-251133
Responsible library:
WPRO
ABSTRACT
<p><b>AIM</b>To assess the antioxidative properties and the mechanism of action of dihydromyricetin (DMY) from Ampelopsis grossedentata.</p><p><b>METHODS</b>The antioxidative properties of DMY were measured by scavenging 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) and inhibiting lipid peroxidation induced by FeSO4-edetic acid in linoleic acid. The mechanism of antioxidative properties of DMY was tested by measuring the chelating activities of DMY for Fe2+ with ultraviolet spectrum (UV) method.</p><p><b>RESULTS</b>The specific absorption of DPPH radical solution at 517 nm was reduced 73.3%-91.5% when DMY was added into the reaction solution in the concentration range from 0.01% to 0.04%. DMY was shown to greatly inhibit the increase of lipid peroxidation (LPO) values in linolei acid system catalyzed by FeSO4-edetic acid. The reaction rates (A532.min-1) of lipid peroxidation were 0.0021-0.0004 in the concentration range from 0.01% to 0.04% and the inhibition activities of DMY was found to be in a concentration-dependent manner. The mechanism of antioxidative properties of DMY was chelating Fe2+ in the Fe(2+)-dependent lipid peroxidation system.</p><p><b>CONCLUSION</b>DMY showed great antioxidative effect and would be a good natural antioxidant.</p>
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Plants, Medicinal
/
Lipid Peroxidation
/
Molecular Structure
/
Chelating Agents
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Chemistry
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Free Radical Scavengers
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Ampelopsis
/
Flavonols
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Antioxidants
Language:
English
Journal:
Acta Pharmaceutica Sinica
Year:
2003
Document type:
Article