丹酚酸抗氧化活性及其对DNA损伤保护作用
丹酚酸;抗氧化;DNA损伤;化学发光,,丹酚酸;抗氧化;DNA损伤;化学发光,1材料与方法,2结果,3讨论,参考文献
摘要: 目的 探讨丹酚酸抗氧化活性及其对DNA氧化损伤的保护作用机制。方法 运用自由基反应模型观察丹酚酸对二苯代苦味酰肼自由基(DPPH)和羟自由基的淬灭效应,使用邻菲罗啉(Phen)-CuSO4-VC-H2O2-DNA化学发光体系测定丹酚酸对DNA损伤的抑制作用。高效液相色谱(HPLC)测定丹酚酸的组成。结果 丹酚酸水提物(AE)、乙酸乙酯萃取物(EE)、大孔吸附树脂纯化物(RE)和对照维生素(VC)、二丁基羟基甲苯(BHT)对DPPH自由基的半数清除浓度(IC50)分别为1412,153,146,158和715μg/ml。化学发光体系中,丹酚酸的加入能明显抑制并延迟DNA损伤。AE、EE、RE抑制发光50%浓度(IC50)值分别为12936,620,492μg/ml。丹酚酸清除DPPH自由基能力和对羟自由基攻击的DNA损伤保护作用受丹酚酸组成和丹酚酸B含量的影响。结论 丹酚酸属于预防型和断链型抗氧化剂,并可有效清除DPPH和羟自由基,对DNA损伤有明显保护作用。丹酚酸的抗氧化活性及对DNA损伤的保护作用与丹酚酸B含量有关。关键词: 丹酚酸;抗氧化;DNA损伤;化学发光
Antioxidant activiy and protection effect of salvianolic acids on DNA damage
LIU Yan,LI Lei,LIU Ying,et.al.
Department of Health Laboratory Technology,Public Health College,Nanjing Medical University(Nanjing 210029,China)
Abstract: Objective To study on the antioxidant activity of salvianolic acids and mechanisms of its protection against DNA antioxidative damage.Methods Free radical model was employed to investigate the scavenging activity to 1,1-diphenyl-2-picryl-hydrazyl(DPPH) and hydroxyl free radicals.The mechanisms of the effects of salvianolic acids on protection against DNA damage was measured by chemiluminescence on the reaction system of phenanthroline (Phen)-CuSO4-VC-H2O2-DNA.Salvianolic acids composition in samples were determined according to HPLC analysis.Results The hemi-inhibitable concentration(IC50) of crude aqueous extract(AE) ......
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