Abstract
The antioxidant activities of Wisteria floribunda flowers (WFF) were evaluated. The samples were prepared by extracting separately two different colored flowers (purple and white) with four different solvents (methanol, ethanol, acetone, and water). The antioxidant properties were evaluated by determining total phenolic contents (TPC), radical scavenging activity (RSA), and reducing power (RP). Water extract from purple WFF and ethanol extract of white WFF showed the highest total phenol contents (491 and 787 μM gallic acid equivalents), respectively. Water extracts of purple and white WFF also showed higher RSA. In the case of RP, ethanol extract of purple WFF, methanol and water extracts of white WFF showed relatively higher values. The 200 μM H2O2 induced oxidative DNA damage in human leukocytes was significantly inhibited with WFF extracts excluding ethanol and acetone extracts of purple flowers. These results suggest that W. floribunda flowers have significant antioxidative activity and protective effect against oxidative DNA damage.
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