空心莲子草多糖的体外抗氧化活性

Antioxidant Activity in vitro of Polysaccharides from Alternanthera philoxeroides (Mart.) Griseb

目的:研究空心莲子草多糖抗氧化能力。方法:用对DPPH自由基清除率、DMPD自由基清除率和还原能力来考察不同质量浓度的空心莲子草多糖的体外抗氧化活性。结果:不同质量浓度的空心莲子草多糖的抗氧化能力不同;对DPPH自由基的EC50值为26.93mg/L(VC 47.22mg/L),对DMPD自由基的EC50值为73.42mg/L(VC71.25mg/L)。结论:空心莲子草多糖是良好的天然抗氧化剂。

Objective： To study the antioxidant activity in vitro of polysaccharides from the whole plant of Alternanthera philoxeroides（Mart.） Griseb（APG）.Methods： The antioxidant activity of polysaccharides from APG was evaluated by reducing power and scavenging capacities against DPPH and DMPD free radicals.Results： The antioxidant activity of polysaccharides from APG at various concentrations displayed an obvious difference.Compared with vitamin C,polysaccharides from APG had higher antioxidant activity.The EC50 values of polysaccharides from APG and vitamin C against DPPH free radicals were 26.93 mg/L and 47.22 mg/L,and against DMPD free radicals were 73.42 mg/L and 71.25 mg/L,respectively.Conclusion： Polysaccharides from APG is an effective and multifunctional natural antioxidant and radical scavenger so that it has potential exploitation and utilization.