An acid polysaccharide of cyrtomium falcatum and a preparation method and application thereof

Abstract

This application relates to the field of bioactive substance separation and purification technology, and discloses an acidic polysaccharide from *Fragaria sibirica*, its preparation method, and its application. The acidic polysaccharide from *Fragaria sibirica* has a weight-average molecular weight of 10840 Da, and its monosaccharide composition and molar percentage are as follows: mannose 2.28%, glucosamine 0.75%, rhamnose 11.20%, glucuronic acid 5.20%, galacturonic acid 48.34%, galactosamine 0.75%, glucose 2.21%, galactose 13.95%, xylose 2.67%, and arabinose 13.40%. The acidic polysaccharide from *Fragaria sibirica* is linked in a manner of 1,4-GalpA, 1,3,4-GalpA, and 1,2,4-Rhap. This application systematically elucidates the structural characteristics of acidic polysaccharides from *Pteris vittata*, clarifying their physicochemical properties, sugar composition, and main glycosidic bond linkages. The acidic polysaccharides from *Pteris vittata* possess anti-inflammatory and antioxidant properties, and within a safe concentration range, they can reduce the levels of related indicators such as NO, TNF-α, IL-6, and ROS in cells, demonstrating potential for inhibiting inflammatory responses and alleviating oxidative stress.

Images