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食品与发酵工业  2020, Vol. 46 Issue (7): 50-56    DOI: 10.13995/j.cnki.11-1802/ts.022967
  研究报告 本期目录 | 过刊浏览 | 高级检索 |
黄芪多糖的分离、结构表征及益生活性研究
刘卫宝1,2, 余讯3, 徐静静1,2, 詹晓北1,2*, 张洪涛1,2, 朱莉1,2
1(糖化学与生物技术教育部重点实验室(江南大学),江苏 无锡,214122);
2(江南大学 生物工程学院,江苏 无锡,214122);
3(南京医科大学附属无锡第二医院影像科,江苏 无锡,214002)
Isolation, structure characterization and prebiotic activity of polysaccharides from Astragalus membranaceus
LIU Weibao1,2, YU Xun3, XU Jingjing1,2, ZHAN Xiaobei1,2*, ZHANG Hongtao1,2, ZHU Li1,2
1(Key Laboratory of Carbohydrate Chemistry and Biotechnology(Jiangnan University), Ministry of Education, Wuxi 214122,China);
2(School of Biotechnology, Jiangnan University, Wuxi 214122, China);
3(Department of Radiology,Wuxi Second Hospital Affiliated to Nanjing Medical University,Wuxi 214002,China)
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摘要 对从蒙古黄芪中分离纯化获得的APS-1和APS-2进行结构表征,同时考察黄芪粗多糖(Astragalus crude polysaccharide,APS)的益生活性。运用高效凝胶过滤色谱(high performance size exclusion chromatography, HPGFC)、离子色谱(ion chromatography, IC)、红外(infrared spectroscopy, FT-IR)和核磁(nuclear magnetic resonance spectros copy, 1H-NMR)技术分析APS-1和APS-2的分子质量、单糖组成和糖苷键类型。利用人体粪便体外发酵APS,通过气相色谱法分析短链脂肪酸(short-chain fatty acids, SCFA)的产生来评价APS的益生活性。结果显示, APS-1和APS-2分子质量分别为38.4和5.2 kDa。APS-1主要由半乳糖和葡萄糖组成,摩尔比为1:49.76。APS-2主要由鼠李糖、半乳糖和葡萄糖组成,摩尔比为1:2.99:16.26。APS-1以α-糖苷键为主,APS-2同时包含α-糖苷键和β-糖苷键。当APS的添加量为5 g/L时,发酵培养基的pH从7.49(0 h)降至5.88(48 h),总SCFA、乙酸、丙酸和丁酸的含量均显著增加。结果表明,APS被肠道微生物代谢后可以产生对人体具有良好益生活性的短链脂肪酸。
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刘卫宝
余讯
徐静静
詹晓北
张洪涛
朱莉
关键词:  黄芪多糖  分离纯化  结构表征  益生活性  短链脂肪酸    
Abstract: A water-soluble crude polysaccharide named as APS was isolated from the roots of Mongolia Astragalus membranaceus by hot water extraction and its in vitro prebiotic activity was tested. After purification, two main polysaccharides (APS-1 and APS-2) with relative molecular masses of 38.4 kDa and 5.2 kDa were collected. Their structural characteristics were investigated by high performance gel filtration chromatography (HPGFC), ion chromatography (IC), fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy(1H-NMR). Based on the data obtained, APS-1 was mainly composed of galactose and glucose with a molar ratio of 1:49.76. APS-2 was mainly composed of rhamnose, galactose and glucose with a molar ratio of 1:2.99:16.26. APS-1 was found to be mainly composed of α-type glycosidic bonds while APS-2 contained both α-type glycosidic bonds and β-type glycosidic bonds. When APS (5 g/L) was fermented by human feces, the pH of the medium decreased from 7.49 (0 h) to 5.88 (48 h), and the contents of total short-chain fatty acids (SCFA), acetic acid, propionic acid, and butyric acid were all significantly increased. The results showed that APS had great prebiotic activity to human intestinal microbes.
Key words:  Astragalus polysaccharide    purification    structural characterization    prebiotic activity    short-chain fatty acids
收稿日期:  2019-12-04                出版日期:  2020-04-15      发布日期:  2020-05-19      期的出版日期:  2020-04-15
基金资助: 国家重点研发技术(2017YFD0400302)
作者简介:  硕士研究生(詹晓北教授为通讯作者,E-mail: xbzhan@yahoo.com)
引用本文:    
刘卫宝,余讯,徐静静,等. 黄芪多糖的分离、结构表征及益生活性研究[J]. 食品与发酵工业, 2020, 46(7): 50-56.
LIU Weibao,YU Xun,XU Jingjing,et al. Isolation, structure characterization and prebiotic activity of polysaccharides from Astragalus membranaceus[J]. Food and Fermentation Industries, 2020, 46(7): 50-56.
链接本文:  
http://sf1970.cnif.cn/CN/10.13995/j.cnki.11-1802/ts.022967  或          http://sf1970.cnif.cn/CN/Y2020/V46/I7/50
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