title: Identification of Cultured and Natural Astragalus Root Based on Monosaccharide Mapping.
abstract: As the main substances responsible for immunomodulatory activity, saccharides can be used as quality indicators for Astragalus root (RA). Saccharide content is commonly determined by ultraviolet spectroscopy, which lacks species specificity and has not been applied in the Chinese Pharmacopoeia. Monosaccharide mapping based on trifluoroacetic acid (TFA) hydrolysis can be used for quantitative analysis of saccharide compositions. In addition, species specificity can be evaluated by analysis of the mapping characteristics. In this study, monosaccharide mapping of soluble saccharides in the cytoplasm and polysaccharides in the cell wall of 24 batches of RA samples with different growth patterns were obtained based on TFA hydrolysis followed by gas chromatography-mass spectrometry. Results indicated that the mapping and the molar ratios of saccharide compositions of the cultured and natural RA samples were different for both cytoplasm and cell wall. For example, the molar ratio of mannose and arabinose was more than 3.5:1 in cytoplasm in cultured RA, whereas the ratio was less than 3.5:1 in natural RA. This research not only lays a foundation for screening indicators for RA, but also provided new ways of evaluating the quality of Chinese medicinal materials in which saccharides are the main bioactive substances.
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. like@sxu.edu.cn.
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. wx2010haoxia@126.com.|College of Chemistry and Chemical Engineering, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. wx2010haoxia@126.com.
authors.forename: Xia
authors.initials: X
authors.lastname: Hao
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. gaofanrong@163.com.|College of Chemistry and Chemical Engineering, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. gaofanrong@163.com.
authors.forename: Fanrong
authors.initials: F
authors.lastname: Gao
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. wangguizhen@163.com.|College of Chemistry and Chemical Engineering, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. wangguizhen@163.com.
authors.forename: Guizhen
authors.initials: G
authors.lastname: Wang
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. zhangzzsxu@163.com.
authors.forename: Zhengzheng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. dugh@imm.ac.cn.|Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China. dugh@imm.ac.cn.
authors.forename: Guanhua
authors.initials: G
authors.lastname: Du
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, China. qinxm@sxu.edu.cn.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Qin
mesh_terms: D027883:Astragalus Plant / Q000737:chemistry*; D009005:Monosaccharides / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D014269:Trifluoroacetic Acid / Q000737:chemistry
chemical_list: D009005:Monosaccharides; D014269:Trifluoroacetic Acid
keywords: Astragalus root; cultured RA; monosaccharide mapping; natural RA; quality evaluation