熵权逼近理想排序法结合谱效分析辨识菊花抗氧化功能的物质基础

Identification of the Antioxidant of Chrysanthemum morifolium Using Entropy-weighted TOPSIS Method Combined with Spectrum-effect Analysis

目的评价不同产地菊花的抗氧化功能并辨识其药效物质基础。方法建立不同产地菊花水提物高效液相色谱(HPLC)指纹图谱;测定其2,2-联苯基-1-苦基肼基(DPPH)、羟基、2,2-联氮-二(3-乙基-苯并噻唑-6-磺酸)二铵盐(ABTS)、超氧阴离子自由基清除能力和铁离子还原能力(FRAP);采用熵权逼近理想排序法(TOPSIS)计算单指标的权重系数,从而计算不同产地菊花的抗氧化总药效;采用灰色关联度和偏最小二乘法进行谱效分析,辨识菊花抗氧化功能的物质基础。结果10批不同产地菊花指纹图谱共鉴定16个共有峰,指认其中13个成分;不同产地菊花均具较好的抗氧化能力,熵权TOPSIS分析结果显示10批菊花抗氧化总药效排序为:S1>S8>S3>S5>S4>S10>S7>S2>S9>S6;谱效分析结果发现峰1~5、9、10、12、14与抗氧化活性呈正相关,变量投影(VIP)值均>1,且这9个峰与总药效的关联系数均>0.7。结论熵权TOPSIS结合谱效分析可用于筛选菊花抗氧化功能的物质基础,研究结果为建立基于质量标志物的菊花质量评价体系从而提升其质量控制水平提供依据。

Objective To evaluate the antioxidant function of Chrysanthemum morifolium from different origins and to identify their antioxidant material basis.Methods The HPLC fingerprints of the water extracts of C.morifolium from different origins were established.The antioxidant activities of C.morifolium were assayed by measuring the 2.2-diphenyl-l-picrylhydrazyl(DPPH),hydroxyl radical,ABTS,superoxide anion radical scavenging capacity and ferric ion reducing capacity FRAP.Entropy-weighted TOPSIS was used to calculate the weighting coefficients of the single indexes.Grey relational analysis(GRA)and partial least squares were used for spectrum-effect analysis to identify the antioxidant material basis of C.morifolium.Results A total of 16 common peaks were discovered in the fingerprint of the water extracts of 10 batches of C.morifolium,among which 13 common components were identified.All the C.morifolium samples had good antioxidant capacity,and the results of entropy-weighted TOPSIS analysis showed that the ranking of total antioxidant potency of 10 batches of C.morifolium was follows:S1>S8>S3>S5>S4>S10>S7>S2>S9>S6.The peaks of 1-5,9,10,12,14 were positively correlated with the antioxidant activity and the variable influence on projection(VIP)values were greater than 1.The correlation coefficients of these nine peaks in GRA were all greater than 0.7.Conclusion The entropy-weighted TOPSIS method combined with the spectrum-effect analysis could be used to screen out the antioxidant material basis of C.morifolium and the results provide a basis for establishing quality assessment system for C.morifolium based on Quality-markers thus improving the quality control level.