利用电子顺磁波谱技术研究红参对羟自由基的清除作用  

Exploring the Substances of Scavenging Hydroxyl Radical in Red Ginseng by EPR Determination

作　　者：刘紫琪 孔德志[1] 田园 张盼盼 任雷鸣[1] Liu Ziqi;Kong Dezhi;Tian Yuan;Zhang Panpan;Ren Leiming(College of Integrated Traditional Chinese and Western Medicine,Hebei Medical University,Shijiazhuang,050017,China)

机构地区：[1]河北医科大学中西医结合学院,石家庄050017

出　　处：《世界科学技术-中医药现代化》2020年第4期1255-1261,共7页Modernization of Traditional Chinese Medicine and Materia Medica-World Science and Technology

基　　金：河北省科技厅河北省自然科学基金资助项目(H2016206030):人微粒体酶系多沙唑嗪对映体代谢差异的机制研究,负责人:任雷鸣

摘　　要：目的探索电子顺磁波谱(electron paramagnetic resonance,EPR)技术检测红参清除自由基活性的适合产生体系,并研究红参对羟自由基(?OH)的清除作用及其物质基础。方法采用电子顺磁共振波谱仪检测不同浓度的红参提取液对?OH的体外清除作用,并用液质联用技术(LC-MS)分析红参中的主要皂苷成分,然后研究这些人参皂苷成分对?OH的清除作用。结果确定了羟自由基的生成体系为:Fe2+0.1 mmol?L-1、H2O2500 mmol?L-1、DMPO 225 mmol?L-1;不同浓度的红参提取液对?OH具有明显的清除作用,且其清除?OH的效力与浓度成正相关;LC-MS分析显示该红参提取液中主要含有Rh1、Rf、Rb3、F1、F2、Rg3、Rg5等成分,其中人参皂苷Rg5的清除自由基活性最强。结论本研究建立了用EPR技术研究红参清除自由基活性的适合产生体系,红参具有明显的清除?OH的能力,且人参皂苷Rg5是其清除自由基的活性成分之一,确定了红参抗自由基的主要物质基础,为红参及人参皂苷Rg5的开发、应用提供了科学依据和理论基础。Objective To establish a suitable free radicals generation system for exploring the effects of scavenging free radical activity of red ginseng by electron paramagnetic spectroscopy(EPR)technology,and to study the scavenging effect of red ginseng on hydroxyl radical(·OH)and find the active substances in ginseng.Methods The scavenging effects of red ginseng extract in different concentrations hydroxyl radical in vitro were detected by EPR.Then the identified ginsenosides in red ginseng screened by the LC-MS method were also analyzed by EPR.Results The established hydroxyl radical generation system was as following:Fe2+0.1 mmol·L-1,H2 O2500 mmol·L-1,DMPO 225 mmol·L-1.Red ginseng extracts have obvious scavenging effect on·OH,and the scavenging effect were raised with the concentrations of red ginseng.LC-MS analysis showed that the red ginseng extract mainly contained Rb1,Rf,Rb3,F1,F2,Rg3,Rg5 and other components.Ginsenoside Rg5 showed the strongest scavenging activity among these components.Conclusion This study established a suitable free radicals generation system for the study of scavenging effect of red ginseng on hydroxyl radical by EPR determination.Red ginseng could scavenge·OH obviously,and ginsenoside Rg5 is one of the active components for scavenging free radicals.It provides scientific and theoretical basis for the development and application of ginsenoside Rg5.

关 键 词：电子顺磁共振 羟自由基 红参 人参皂苷 LC-MS 

分 类 号：R285[医药卫生—中药学]