초록 열기/닫기 버튼
The aim of the present study was to investigate the antioxidant efficacies between extracts of Prunus yedoensis(PY) and Betulae platyphyllae var. japonica(BP). HPLC pattern was different between barks and extract solvents. Content of total phenolic compound was the highest in ethanol extract of BP(382.201 mg/g ext.) and its content was 1.9 times higher than that from the water extract of PY. Total antioxidant efficacy also was the highest in ethanol extract of BP (292 copper reducing equivalents). Nitric oxide scavenging activity was almost 70% in ethanol extract of BP treated 200 ug/ml and it was higher than positive control(ascorbic acid). DPPH radical scavenging ability was up by 80% in all samples. ABTS cation decolorization from each barks was activated over 85% in all samples at 100 ug/ml concentration, especially, the activity was the highest (94.4%) in ethanol extract of BP. Hydrogen peroxide scavenging activities were also highest (45%) in ethanol extract of BP at 200 ug/ml concentration and were as high as positive control. Stimulation of the macrophages RAW 264.7 cells with lipopolysaccharide (LPS) increased intracellular ROS levels and ethanol extract of BP at 200 ug/ml concentration reduced ROS levels up to 41 %. The results indicated that the barks of PY and BP has potent antioxidant activities and ethanol extract of BP of them has the highest antioxidant activities.
