Extraction and Purification of Intracellular Polysaccharide from Schizophyllum commune and Its Biological Activity

被引：0
|
作者：
Li Q. [1 ,2 ]
Zhang L. [1 ,2 ]
Wang H. [1 ]
Wang Z. [2 ]
Ding Q. [1 ]
Wang H. [1 ]
机构：
[1] Yantai Institute of China Agricultural University, Yantai
[2] College of Food Science & Nutritional Engineering, China Agricultural University, Beijing
来源：
Science and Technology of Food Industry | 2023年 / 44卷 / 04期
关键词：
antibacterial activity; antioxidant activity; extraction and purification; intracellular polysaccharide; Schizophyllum commune;
D O I：
10.13386/j.issn1002-0306.2022050206
中图分类号：
学科分类号：
摘要：
In order to improve the extraction rate of crude polysaccharide from Schizophyllum mycelium and explore the biological activity of purified intracellular polysaccharide, this study adopted the method of ultrasonic-assisted hot water extraction to extract intracellular crude polysaccharide from Schizophyllum mycelium and the extraction process was optimized by response surface method. On this basis, DEAE-52 ion-exchange column and Sephadex G-100 dextran gel column chromatography were used to separate and purify the crude polysaccharide, and then the structural characterization, antioxidant capacity and antibacterial activity of the purified polysaccharide were carried out. Results showed that the optimal extraction conditions of intracellular crude polysaccharides were as follows: Under the extraction temperature of 90 ℃, the water-material ratio 30:1, the ultrasonic time 30 min, the ultrasonic power 230 W. Under these conditions, the extraction rate of intracellular crude polysaccharide was 18.14%±0.33%. The purified polysaccharide fraction NSPG-1 was a β-pyranose sugar with the molecular weight of 1.05×106 Da. NSPG-1 had good antioxidant capacity and the IC50 values for DPPH radical, hydroxyl radical and superoxide anion radical were 6.97 1.07 and 11.41 mg/mL, respectively. NSPG-1 had good antibacterial activity and the IC50 values against Escherichia coli, Bacillus subtilis and Staphylococcus aureus were 7.56, 12.54 and 10.42 mg/mL, respectively. The results would provide a basis for the industrial production and utilization of Schizophyllan. © 2023, Editorial Department of Science and Technology of Food Science. All rights reserved.
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页码：252 / 260
页数：8
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