天然产物研究与开发 ›› 2020, Vol. 32 ›› Issue (增刊2): 23-27.

• 研究论文 • 上一篇    下一篇

内生草酸青霉SY-15中聚酮类物质Popk-1的抗氧化活性分析

刘欢,刘呈雄,熊泽,刘士平,薛艳红*


  

  1. 三峡大学生物与制药学院天然产物研究与利用湖北省重点实验室,宜昌 443002

  • 出版日期:2020-12-09 发布日期:2020-12-09
  • 基金资助:
    国家自然科学基金(31540065)

Antioxidant activity analysis of the polyketide Popk-1 in Penicillium oxalicum SY-15

LIU Huan,LIU Cheng-xiong,XIONG Ze,LIU Shi-ping,XUE Yan-hong*#br#

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  1. Hubei Provincial Key Laboratory of Natural Product Research and Utilization,School of Biology and Pharmaceuticals,Three Gorges University,Yichang 443002,China

  • Online:2020-12-09 Published:2020-12-09

摘要:

从11株内生草酸青霉中筛选到一株抗氧化活性较高的菌株SY-15,利用活性追踪的方法,对其发酵液进行了抽滤、萃取、浓缩、柱层析和HPLC等分离得到一化合物,通过NMR分析和对比文献发现其为一种聚酮类物质,含有氧杂蒽酮的母核。该物质的总抗氧化活性为70.66 U/mL,DPPH自由基清除率达到80.67%,铁氰化钾还原力测定其吸光值为1.43,分别达到同等浓度维生素C的72.99%、81.76%、58.85%。体内实验表明此化合物可有效提高氧化胁迫下酵母细胞的存活力,对酵母细胞有一定的抗氧化损伤保护作

关键词: 内生菌, 草酸青霉, SY-15, Popk-1, 抗氧化

Abstract:

A strain SY-15 with high antioxidant activity was screened from 11 strains of endophytic penicillium.The fermentation broth was subjected to suction filtration,extraction,concentration,column chromatography and HPLC using activity tracking method.After separation,a compound was obtained,and it was found to be a polyketone by NMR analysis and comparative literature,containing the mother core of xanthone.The total antioxidant activity of the substance is 70.66 U/mL,the DPPH free radical scavenging rate is 80.67%,and the absorbance value of potassium ferricyanide is 1.43,which reaches 72.99%,81.76%,58.85% of the same concentration of vitamin C.In vivo experiments have shown that this compound can effectively improve the viability of yeast cells under oxidative stress,and has a certain protective effect on yeast cells against oxidative damage.

Key words: endophytic fungi, Penicillium oxalicum, SY-15, Popk-1, antioxidant

中图分类号:  Q939.99