Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (8): 2465.doi: 10.7503/cjcu20210064

• Organic Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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