期刊
CARBOHYDRATE POLYMERS
卷 227, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115314
关键词
White asparagus skin; Polysaccharide; Structure; Pectin; NMR; Immunomodulatory
资金
- Project program of Key Laboratory of Food Nutrition and Safety, Ministry of Education, China [2018012]
- National Natural Science Foundation of China [31701551]
The physicochemical properties, structural features and immunomodulatory effects of the white asparagus (Asparagus officinalis L.) skin polysaccharides (WASP) were systematically studied. WASP showed a pectic-like structure with a relatively low degree of esterification (DE, 18%); the weight-average molecular weight (Mw) and intrinsic viscosity were 76.1 kDa and 13 mL/g, respectively. Structurally, the dominated sugar residue of WASP was 4 a D GalpA (39.7 mol%), while other residues including alpha-L-Araf, 3-alpha-L Rhap, 2,4-alpha-L Rhap, and 4-beta-D-Galp were also detected with a comparable amount. A proposed structure of WASP was also presented. Physiologically, WASP could modulate the immune response of RAW 264.7 macrophages through increasing the release of immune factors (IL-6, TNF-alpha and IL-10) and improving the expression of mRNA. To conclude, the pectic-like polysaccharides from white asparagus (Asparagus officinalis L.) skin could be potentially used as an immunomodulatory agent in functional food.
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