高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (8): 2465.doi: 10.7503/cjcu20210064

• 有机化学 • 上一篇    下一篇

黑木耳寡糖的提取、 结构表征及生物活性

胡皓程, 李文利, 张嘉宁, 刘宇博()   

  1. 大连理工大学生命科学与药学学院, 盘锦 124221
  • 收稿日期:2021-01-27 出版日期:2021-08-10 发布日期:2021-08-05
  • 通讯作者: 刘宇博 E-mail:liuyubo@dlut.edu.cn
  • 基金资助:
    国家自然科学基金(31971214)

Extraction, Structure Characterization and Biological Activities of Oligosaccharides from Auricularia heimuer

HU Haocheng, LI Wenli, ZHANG Jianing, LIU Yubo()   

  1. School of Life and Pharmaceutical Science,Dalian University of Technology,Panjin 124221,China
  • Received:2021-01-27 Online:2021-08-10 Published:2021-08-05
  • Contact: LIU Yubo E-mail:liuyubo@dlut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(31971214)

摘要:

以热爆预处理制备的黑木耳发酵原浆为原料, 采用热水浸提法提取黑木耳粗多糖(Crude Auricularia heimuer polysaccharide, CAHP). 通过H2O2氧化水解和超声物理水解联用的方法降解CAHP, 经阴离子交换柱层析和凝胶过滤柱层析分离, 获得黑木耳寡糖1(Auricularia heimuer oligosaccharide 1, AHO1). 单糖组成分析、 高分辨质谱、 红外光谱和核磁共振波谱等表征结果表明, AHO1是以甘露糖为主, 由6种单糖组成, 各糖残基通过α-糖苷键连接, 聚合度为2~10的低聚糖. 功能分析结果表明, AHO1具有一定的自由基清除能力, 且能够有效减弱H2O2诱导的HepG2细胞氧化应激反应. 抑菌实验结果显示, AHO1不仅对大肠杆菌DH5α和金黄色葡萄球菌ATCC6538具有较好的抑制作用, 还能有效抑制带氨苄抗性的基因工程菌活性.

关键词: 黑木耳, 寡糖结构, 抗氧化活性, 抑菌活性

Abstract:

In this study, Auricularia heimuer fermentation puree prepared by thermal explosion pretreatment was used as raw material. Crude Auricularia heimuer polysaccharide(CAHP) was extracted by hot water extraction. CAHP was degraded by a combination of H2O2 oxidative hydrolysis and ultrasonic physical hydrolysis. Then, CAHP was separated by anion exchange column chromatography and gel filtration column chromatography to obtain Auricularia heimuer oligosaccharide 1(AHO1). Analyzed by monosaccharide composition analysis, high-resolution mass spectrometry, infrared spectroscopy, and nuclear magnetic resonance, AHO1 is an oligosaccharide with a degree of polymerization of 2—10 connected by α-glycosidic bonds, which is composed of six kinds of monosaccharides, maliy mannose. The results of functional analysis showed that AHO1 had certain free radical scavenging ability and could effectively attenuate the oxidative stress response of HepG2 cells induced by H2O2. The results of antibacterial experiments showed that AHO1 not only has a good inhibitory effect on Escherichia coli DH5α and Staphylococcus aureus ATCC6538, but also can effectively inhibit the activity of genetically engineered bacteria with ampicillin resistance.

Key words: Auricularia heimuer, Oligosaccharide structure, Antioxidant activity, Antibacterial activity

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