青钱柳内生真菌次生代谢产物抗氧化活性研究

2021-11-17 00:29:04胡世一周雅琴安宁石忠衡赵立春谭小明
中国民族民间医药·下半月 2021年9期

胡世一 周雅琴 安宁 石忠衡 赵立春 谭小明

【摘要】目的:分析广西产濒危药用植物青钱柳内生真菌次生代谢产物的抗氧化活性,筛选具有抗氧化活性较强的内生真菌菌株。方法:以课题组前期已分离培养的131株青钱柳内生真菌的发酵粗提取物为研究对象,对发酵产物的DPPH·、·OH-、O-2·、NO-2能力和Fe2+螯合能力进行检测。结果:结果表明,青钱柳内生真菌表现出具有一定清除DPPH·、·OH-、O-2·、NO-2能力和Fe2+螯合能力,对DPPH·、·OH-、O-2·、NO-2最大清除率和对Fe2+最大螯合率分别为81.32 %、87.83 %、49.7 %、43.5 %、82.24 %;菌株824F、894F、907F、885F、890F、876F、912F清除·OH-自由基能力較强,清除率均大于阳性对照VC。结论:结果表明青钱柳内生真菌代谢产物具有良好的抗氧化活性,可作为寻找新型天然抗氧化剂的潜在资源。

【关键词】青钱柳;内生真菌;代谢产物;抗氧化活性

【中图分类号】R285.5【文献标志码】 A【文章编号】1007-8517(2021)18-0016-05

Study on the Antioxidant Activity of Secondary Metabolites from Endophytic Fungi of Cyclocarya paliurus (Batal.) IljinskHU Shiyi1ZHOU Yaqin1,2*AN Ning1SHI Zhongheng1ZHAO Lichun1TAN Xiaoming1,3*

1.Guangxi University of Chinese Medicine,Nanning 530200,China;2.Guangxi Botanical Garden of Medicinal Plant,

Nanning 530023,China;3.Guangxi Engineering Technology Research Center of Advantage Chinese Patent

Drug and Ethnic Drug Development,Nanning 530200,ChinaAbstract:Objective To analyzethe antioxidant activity of Cyclocarya paliurus(Batal.) Iljinsk,an endangered medicinal plant from Guangxi,the secondary metabolites of endophytic fungi from C.paliurus were screened.Methods The antioxidant activity of the secondary metabolites of 131 endophytic fungi from C.paliurus were detected by analyzing the ability of DPPH ·,·OH-、O-2·、NO-2 and chelating Fe2+.Results The results showed that the extracts from endophytic fungi of C.paliurus had the ability of scavenging DPPH ·,·OH-、O-2·、NO-2 and chelating Fe2+,and their maximum scavenging rates were 81.32%,87.83%,49.7%,43.5% and 82.24%,respectively. The seven isolates including 824F,894F,907F,885F,890F,876F and 912F had stronger scavenging ability of OH radicals,and the scavenging rates were higher than that of the positive control VC.Conclusions The results showed that the metabolites of endophytic fungi of C.paliurus had good antioxidant activity and could be used as a potential resource for new natural antioxidants.

Keywords:Cyclocarya paliurus; Endophytic Fungi; Metabolites; Antioxidant Activity

人体在正常生理代谢过程中会产生大量的自由基,如过氧化自由基、超氧阴离子自由基、羟基自由基等,它们是人体疾病、衰老和死亡的直接参与者,一般情况下,当体内自由基的产生与清除能力处于平衡状态时,受控的自由基对人体是有益的,一旦失衡,体内就会出现“氧化应激”状态,这时则需要通过补充抗氧化剂来调整体内自由基平衡,以防止疾病的发生[1]。日常中,被广泛应用于化妆品、保健食品和药物中的抗氧化剂多为人工化学合成制品,存在有诸多毒副作用,难以满足人们的生活需求[2]。

内生真菌是指生活在健康植物组织器官内部,但不会引起宿主植物出现明显病害症状的一类真菌,包括一些在其生活史的某一阶段表面生的腐生菌、潜伏性病原菌和菌根菌[3]。……

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