野葛根酸性多糖的结构鉴定及免疫活性  

Identification and Immunomodulatory Activity of a Acidic Polysaccharide from the Pueraria lobate(Willd.) Ohwi Root

作　　者：董洲[1] 李惠娴 张猛猛 赖富饶[1] 张晓元 吴晖[1,2] DONG Zhou;LI Hui-xian;ZHANG Meng-meng;LAI Fu-rao;ZHANG Xiao-yuan;WU Hui(College of Food Sciences and Engineering,South China University of Technology,Guangzhou 510640,China;Shaoguan Huagong High-tech Industrial Research Institute,Shaoguan 512027,China)

机构地区：[1]华南理工大学食品科学与工程学院,广东广州510640 [2]韶关市华工高新技术产业研究院,广东韶关512027

出　　处：《现代食品科技》2018年第7期68-75,共8页Modern Food Science and Technology

基　　金：广东省科技计划项目(2017A020108006;2016B010121014)

摘　　要：本文采用离子交换层析结合凝胶渗透色谱技术从野葛根的热水浸提液中分离纯化得到一种新型酸性多糖,鉴定了该多糖的结构特征,并初步探究了其免疫调节活性。结果显示,该酸性多糖是一种分子量约为12300 u且具有一定支链结构的葡聚糖,不具有三螺旋空间结构,其糖苷键类型为α-(1→4)和α-(1→4,6)。以小鼠巨噬细胞RAW264.7为实验对象,研究发现该酸性多糖能有效地刺激细胞分泌细胞因子NO、TNF-α和IL-6,进而体现出较强的免疫调节活性。A novel acidic polysaccharide was isolated and purified from the hot-water extract of Pueraria lobate（Willd.） Ohwi root, using a sequential ion exchange chromatography and gel-filtration chromatography. The structural features of this acidic polysaccharide were characterized, and its immunomodulatory activity investigated. This acidic polysaccharide is a homogeneous glucan with branched chains, with an average molecular weight of 12300 u, which has no three spiral space conformation. The main linkage types of this polysacchide were α-（1→4） and α-（1→4, 6）. Using RAW264.7 cells as the model, this acidic polysaccharide has been confirmed to exhibit an immunomodulatory activity through promoting the secretion of NO, IL-6, and TNF-α.

关 键 词：野葛根 多糖 结构 免疫调节 

分 类 号：TS201.2[轻工技术与工程—食品科学]