Structure characterization and immunoactivity on dendritic cells of two neutral polysaccharides from Dictyophora rubrovalvata

Autor: Ni Huang, Yi-Na Yang, Jia Huang, Hui-Yan Shao, Yan-Lang Li, Shi-Hui Qin, Han-Fen Li, Xiao-Jiang Shen, Liu Yang, Jiang-Miao Hu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Natural Products and Bioprospecting, Vol 14, Iss 1, Pp 1-11 (2024)
Druh dokumentu: article
ISSN: 2192-2195
2192-2209
DOI: 10.1007/s13659-024-00476-6
Popis: Abstract Dictyophora rubrovalvata is a valuable fungus homologous to food and medicine, and its polysaccharide have been gaining increasing attention because of its plentiful activity. However, the structure and activity of its homogeneous polysaccharide have not been studied enough. In this study, two polysaccharides DRP-I and DRP-II were purified from D. rubrovalvata. Their structures were characterized by chemical composition, monosaccharide composition analysis, methylation analysis and nuclear magnetic resonance spectroscopy. The results showed that DRP-I and DRP-II were neutral heteropolysaccharides with molecular weights of 5.79 × 103 and 1.25 × 104 Da, respectively, which were composed of mannose, galactose, glucose, xylose and fucose. The main chains were → 6)-α-D-Galp-(1 → 6)-α-D-Galp-(2,1 → 6)-α-D-Manp-(2,1 → 6)-α-D-Galp-(1, and branch chains were β-D-Xylp-(1 → 3)-α-L-Fucp-(1 → 4)-α-D-Manp-(1 → and α-D-Galp-(1 → 3)-α-D-Galp-(1 → . The in vitro immunoactivity assays on dendritic cells showed that DRP-I and DRP-II could up-regulate the expression of IL-10 and IL-6 and inhibit the expression of TNF-α in a concentration-dependent manner. This research indicated that DRP-I and DRP-II possessed immunoactivity by balancing the excessive inflammation, and molecular weight is an important factor affecting immunoactivity. Graphical Abstract
Databáze: Directory of Open Access Journals
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