A pectic polysaccharide from Lycium ruthenicum Murray alleviates dextran sulfate sodium-induced colitis in mice

作者：Dai Dong, Hailiang Wang, Hongtao Bi, Yu Li, Tingting Gao, Jingyue Feng, Guoqiang Li, Shiqi Guo, Hongyan Yuan, Weihua Ni · 发表于：Current Research in Food Science · 年份：2024 · DOI：10.1016/j.crfs.2024.100955 · 被引用次数：14 · 研究领域：Microbial Metabolites in Food Biotechnology、Probiotics and Fermented Foods、Polysaccharides and Plant Cell Walls

Inflammatory bowel disorders (IBD) can lead to severe complications like perforation, bleeding, and colon cancer, posing life-threatening risks. Lycium ruthenicum Murray ( L. ruthenicum Murr.), rich in polysaccharides, has been utilized in traditional diets for thousands of years. This study explores the protective effects of the polysaccharide of L. ruthenicum on mice with dextran sulfate sodium (DSS)-induced colitis. In the present study, a pectic polysaccharide (LRWP-A p ) containing arabinogalactan (AG) and homogalacturonic acid (HG) structural domains with a Mw of 4.34 kDa was obtained from L. ruthenicum Murr. Fruit. The gavage administration of LRWP-A p significantly alleviated symptoms of DSS-induced colitis in mice. In this process, LRWP-A p modulated the balance of Arg-1/iNOS to regulate the metabolism of arginine, and the levels of intestinal tight junction (TJ) (ZO-1, Occludin, and Claudin 1) were increased by LRWP-A p treatment, which promoted intestinal barrier function. In addition, LRWP-A p alleviated the inflammatory response while increasing the anti-inflammatory response by reducing the level of proinflammatory factors, enhancing the level of anti-inflammatory factors (IL-10) and improving the balance of Treg/Th17 cells. These effects resulted in the maintenance of intestinal immune homeostasis. Moreover, LRWP-A p modulated the gut microbiota composition and short-chain fatty acid (SCFA) content, which may maintain relatively favorable intestinal homeostasis...