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BioFactors 2007

Antioxidative and cytoprotective effects of Artemisia capillaris fractions.

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Jung-Hee Hong
Ji-Won Lee
Jung-Hyun Park
In-Seon Lee

Märksõnad

Abstraktne

The antioxidant effects of Artemisia capillaris fractions against reactive oxygen species (ROS) were evaluated by measuring scavenging activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, superoxide (O_2(-)), hydroxyl (HO.) and nitric oxide (NO.) radical. Among five solvent fractions, ethyl acetate fraction showed the highest total polyphenol and total flavonoid contents as 648.75 and 89.09 microg/mg, respectively. Also, the ethyl acetate fraction showed the highest scavenging activity; the 50% inhibitory concentration (IC50, microg/mg) value for DPPH, O_2(-), HO. and NO. radical scavenging were 4.76, 31.54, 69.34 and 74.63, respectively. Additionally, the highest inhibition of rat liver microsomal lipid peroxidation was observed by ethyl acetate fraction. Except for free radical-mediated protein damage, ethyl acetate fraction showed the highest scavenging activity. The effect of Artemisia capillaris fractions on cell viability and DNA damage induced by H2O2 in Raw 264.7 cell were also evaluated by MTT and comet assay, respectively. The protective effect of ethyl acetate fraction, as indicated by cell viability increasing 71% and DNA breakage decreasing 51% as compared with H2O2-treated positive control. These results suggest that ethyl acetate fraction possess significant ROS scavenging and protective effect against oxidative DNA damage.

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