研究论文 RESEARCH PAPER

基于高效液相色谱特征指纹图谱法探究不同品种苜蓿中黄酮抗氧化活性的谱-效关系

  • 关淑文 ,
  • 潘予琮 ,
  • 寇伟 ,
  • 年芳 ,
  • 蒋林树
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  • 1. 北京农学院动物科学技术学院, 奶牛营养学北京市重点实验室, 北京 102206;
    2. 甘肃农业大学动物科学技术学院, 兰州 730070
关淑文(1995—),女,黑龙江黑河人,硕士研究生,研究方向为反刍动物营养与免疫。E-mail:guan_shuwen@126.com

收稿日期: 2022-05-07

  网络出版日期: 2022-12-15

基金资助

北京市教育委员会重点项目(KZ202010020029);现代农业产业技术体系北京市家畜创新团队;2022分类发展定额项目-人才引进启动经费(5066516004/003)

Exploring Spectrum-Effect Relationship of Flavonoid Antioxidant Activity in Different Kinds of Alfalfa Based on High Performance Liquid Chromatography Characteristic Fingerprint

  • GUAN Shuwen ,
  • PAN Yucong ,
  • KOU Wei ,
  • NIAN Fang ,
  • JIANG Linshu
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  • 1. Beijing Key Laboratory of Dairy Cattle Nutrition, Institute of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China;
    2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China

Received date: 2022-05-07

  Online published: 2022-12-15

摘要

本试验旨在探究苜蓿中黄酮特征指纹图谱及其主效成分发挥抗氧化能力的谱-效关系。本试验在构建苜蓿中黄酮特征指纹图谱的基础上,采用体外抗氧化法测定14种苜蓿来源的黄酮对1,1-二苯基-2-三硝基苯肼(DPPH)、2,2'-联氮-双-3-乙基苯并噻唑啉-6-磺酸(ABTS)自由基的清除力和还原力的影响,并通过半数抑制浓度系数(IC50)和半数最大效应浓度系数(EC50)评价14种苜蓿中黄酮的体外抗氧化活性;运用主成分分析、偏最小二乘回归模型和多变量间相关性分析构建谱-效关系。结果表明:1)成功构建14种苜蓿来源黄酮的指纹图谱,并确定9个共有峰,其相似度范围在0.471~0.976;指认出峰2为芹菜素,峰3为苜蓿素,峰4为山奈酚。2)14种苜蓿中的黄酮清除DPPH的IC50为1.120~2.149 mg/mL,ABTS的IC50为0.302~0.759 mg/mL,达到还原力的EC50为0.035~0.143 mg/mL。3)经主成分分析、偏最小二乘回归模型和多变量之间相关性分析,峰1、峰6的面积与苜蓿中黄酮抗氧化活性呈显著正相关(P<0.05),峰2的面积与还原力的活性呈显著负相关(P<0.05)。综上所述,通过对苜蓿中黄酮的谱-效关系研究,初步确定了14种苜蓿来源黄酮中具有抗氧化活性的成分为峰1、峰3(苜蓿素);峰6、峰8为DPPH自由基清除主效因子,峰1、峰2(芹菜素)、峰4(山奈酚)、峰6、峰7为ABTS自由基清除主效因子,峰1、峰4(山奈酚)、峰7、峰8为还原力的主效因子,本试验结果为苜蓿黄酮作为一种天然抗氧化饲料添加剂的研究应用提供理论依据。

本文引用格式

关淑文 , 潘予琮 , 寇伟 , 年芳 , 蒋林树 . 基于高效液相色谱特征指纹图谱法探究不同品种苜蓿中黄酮抗氧化活性的谱-效关系[J]. 动物营养学报, 2022 , 34(12) : 8086 -8096 . DOI: 10.3969/j.issn.1006-267x.2022.12.055

Abstract

The purpose of this paper was to explore the characteristic fingerprint of flavonoids in alfalfa and the spectrum-effect relationship of the main active components in their antioxidant capacity. In this experiment, based on the construction of alfalfa flavonoids characteristic fingerprint, the in vitro antioxidant method was used to determine the effects of flavonoids from 14 kinds of alfalfa on the scavenging power and reducing power of 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH) and 2,2'-azo-bis-3-ethyl benzothiazoline-6-sulfonic acid (ABTS) free radicals. The median inhibitory concentration coefficient (IC50) and the half-maximal effect concentration coefficient (EC50) was used to evaluate the antioxidant activities of flavonoids in 14 alfalfa species in vitro. Principal component analysis, partial least squares regression model and multivariate correlation analysis were used to construct a spectrum-effect relationship. The results showed as follows:1) the fingerprints of flavonoids from 14 alfalfa species were constructed, and 9 common peaks were identified, and their similarity ranged from 0.471 to 0.976; peak 2 was identified as apigenin, peak 3 was alfalfa and peak 4 was kaempferol. 2) Eventually, the IC50 values of flavonoids from 14 alfalfa species for eliminating DPPH free radicals ranged from 1.120 to 2.149 mg/mL. The IC50 values for scavenging ABTS free radicals were 0.302 to 0.759 mg/mL. Furthermore, the EC50 values for achieving reducing force were 0.035 to 0.143 mg/mL. 3) Through principal component analysis, partial least squares regression and multivariate correlation analysis, the finding showed that the areas of peaks 1 and 6 were significantly positively correlated with the antioxidant activity of alfalfa flavonoids (P<0.05), and the area of peak 2 was prominently negatively correlated with the activity of reducing force (P<0.05). Through the study on the spectrum-effect relationship of flavonoids in alfalfa, the components with antioxidant activity in flavonoids from 14 alfalfa species are preliminarily determined, namely, peak 1, peak 3 (alfalfa), peak 6, and peak 8 are the main factors of DPPH free radical scavenging. Peak 1, peak 2 (apigenin), peak 4 (kaempferol), peak 6 and peak 7 are the main factors of ABTS free radical scavenging. Furthermore, peak 1, peak 4 (kaempferol), peak 7, and peak 8 are the mainsprings of reducing force. All the results testify a feasible basis for the application of alfalfa flavonoids is a natural antioxidant feed additive in animal production.

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