[Comparison on physicochemical properties and immun activities of polysaccharides from cultures at different development stages of Dendrobium huoshanense].
Từ khóa
trừu tượng
OBJECTIVE
To compare the physicochemical properties and immun activities of polysaccharides extracted from cultures at different development stages of Dendrobium huoshanense.
METHODS
Polysaccharides were extracted by hot water and alcohol precipitation, and isolated by anion exchange chromatography. The physicochemical properties of polysaccharides were analyzed by spectrophotometry, GC-MS, IR and fluorophore-assisted carbohydrate electrophoresis (FACE). ELISA was used to determine the immun activities of polysaccharides.
RESULTS
The polysaccharides from cultures at different development stages of D. huoshanense had no obvious discrepancy in contents. 5 polysaccharides were isolated by anion exchange chromatography with the same elution conditions. GC-MS analysis showed that the polysaccharides from cultures at different development stages of D. huoshanense consisted of glucose, mannose and galactose. IR and FACE displayed that different polysaccharides had no significant change in chemical properties. In vitro experiments with spleen cells proved that the polysaccharides from cultures at different development stages had similar effects on stimulating IFN-gamma and TNF-alpha releases.
CONCLUSIONS
No significant differences are found in the physico-chemical properties and immun activities of polysaccharides extracted from cultures at different development stages of D. huoshanense, suggesting that the polysaccharides of D. huoshanense have stability in quality to some extent during tissue culture.
