三七花总皂苷清除活性氧自由基及抗脂质过氧化作用研究谢云峰谢集照龙盛京邱莉李映新张莹

目的：探讨三七花总皂苷清除活性氧自由基及对抗脂质过氧化作用的影响。方法从三七花盘中提取三七花总皂苷，D-101大孔吸附树脂分离纯化皂苷；采用分光光度法测定其对羟基自由基、DPPH 自由基的作用。用硫代巴比妥分光光度法观察三七花总皂苷对 Fe2＋半胱氨酸诱发肝脂质过氧化作用的影响。结果三七花总皂苷对羟自由基、1,1-二苯基-2-三硝基苯肼（DPPH）自由基的半数清除率（IC50值）分别为0.035 mg/ml、0.094 mg/ml；对Fe2＋半胱氨酸诱发肝脂质过氧化的最大抑制率为89.31%，具有较强的抑制作用。结论三七花总皂苷具有清除活性氧自由基及抗脂质过氧化作用。

Study on the antioxidation activity and resistance of lipid peroxidation of panax notoginseng flower total saponins

Objective To investigate the antioxidation activity and resistance of lipid peroxidation of panax notoginseng flower total saponins.Methods The panax notoginseng flower buds were extracted with ethanol. The hydroxyl free radical（？OH）, 1,1-diphenyl-2-picrythydrazyl radical（DPPH）clearing rate and resistance of lipid peroxidation of rat liver induced by Fe2＋-cysteine were determined by spectrophotometry. Results Half clearance of hydroxyl free radical and DPPH. by panax notoginseng flower total saponin was 0.035 mg/ml and 0.094 mg/ml, the maximum inhibition rate of lipid peroxidation of rat liver induced by Fe2＋-cysteine was 89.31%, therefore moderate concentration of extracts had a strong inhibitory effect on lipid peroxidation. Conclusions Panax notoginseng flower total saponins have antioxidant activity and resistance of lipid peroxidation.