Journal
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
Volume 1152, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jchromb.2020.122255
Keywords
Astragalus polysaccharides for injection; Innate and adaptive immunity; Proliferation; Phagocytic; Structural analysis
Funding
- National Natural Science Foundation of China [81872962]
- National Key R&D Program of China [2019YFC1710800]
- China Postdoctoral Science Foundation Project [2019M650851]
- Science and Technology Research Project of Shanxi Province (China) [2014ZD0401]
- Key Projects of Key Research and Development Plan in Shanxi (China) [201603D311101]
- Shanxi Province Technology Innovation Project of Excellent Talent (China) [201605D211030, 201705D211020]
Ask authors/readers for more resources
As a special traditional Chinese medicine, Astragalus polysaccharides for injection (APS, batch no. Zhunzi Z20040086) includes complex polysaccharide macromolecules that may increase the risk upon application. Although fingerprints for quality control are available, the specific active ingredients are unclear. Identifying the active components is the key to reduce the risk of adverse reactions of the drug. In this work, APS was mainly separated into two components, namely, macromolecular component (APS-I) and small molecular components (APS-II). The molecular weight measurement revealed that the average molecular weight of APS-I exceeded 500 kDa, and that of APS-II was 10 kDa. Monosaccharide-composition analysis revealed that APS-I consisted of glucose, galactose, arabinose, rhamnose, and galacturonic acid, with a ratio of approximately 1.5:1:5.4:0.08:0.1. Meanwhile, APS-II consisted of glucose, galactose, arabinose, rhamnose, and galacturonic acid, with a molar ratio of 9:1:1.4:0.04:0.001. Methylation, FT-IR, and NMR analysis indicated that the APS-I monosaccharide residue was linked as follows: D-Glcp-(1 ->, -> 4)-D-Glcp-(1 ->, -> 2)-L-Rhap-(1 ->, D-Araf-(1 ->, -> 5)-D-Araf-(1 ->, -> 2,5)-D-Araf-(1 ->, -> 4)-D-Galp-(1 -> . Meanwhile, the APS-II monosaccharide residue was connected as follows: alpha-D-Glcp-(1 ->,-> 4)-alpha-D-Glcp-(1 ->, -> 6)-alpha-D-Glcp-(1 ->, -> 4,6)-alpha-D-Glcp-(1 ->, -> 3,4,6)-alpha-D-Glcp-(1 ->, -> 2)-alpha-L-Rhap-(1 ->, alpha-D-Araf-(1 ->, -> 5)-alpha-D-Araf-(1 ->, -> 4)-beta-D-Galp-(1 -> . Screening experiments on their in vitro immunological activity showed that APS-II had stronger effect on innate and adaptive immunities than APS-I. In vivo animal experiments showed that APS-II can increase the leukocyte level of cyclophosphamide immunosuppressed mice and improve their immunomodulatory ability. Therefore, APS-II is the main active ingredient of APS and is expected to become a new generation of APS products.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available