In vitro: |
Chinese Journal of Natural Medicines,2008,6(3):201-4. | Homoisoflavonoids from Ophiopogon japonicus and Its Oxygen Free Radicals(OFRs) Scavenging Effects[Pubmed: 12444717] | To investigate the OFRs scavenging activities of homoisoflavonoids from the fibrous root of Ophiopogon japonicus. METHODS AND RESULTS: The scavenging effect of homoisoflavonoids isolated from O.japonicus extracts was examined on superoxide anion(O2·-),hydroxyl radical(·OH),and hydrogen peroxide(H2O2) by chemiluminescence. Ten homoisoflavonoids were obtained from O.japonicus extracts.They were identified as methylOphiopogonanone A(1),methylophiopogonanone B(2),Ophiopogonanone A(3),ophiopogonanone E(4),5,7-dihydroxy-6,8-dimethyl-3-(4'-hydroxy-3',5'-methoxybenzyl) chroman-4-one(5),methylophiopogonone A(6),methylophiopogonone B(7),desmethylisoophiopogonone B(8),5,7,2'-trihydroxy-8-methyl-3-(3',4'-methylenedioxybenzyl) chromone(9) and 5,7,2'-trihydroxy-6,8-dimethyl-3-(3',4'-methylenedioxybenzyl) chromone(10). CONCLUSIONS: Compounds 8 and 9 were firstly isolated from O.japonicus.The majority of homoisoflavonoids could scavenge ·OH and H2O2 in vitro to a certain extent,and their bioactivities should be related with the respective structures. |
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