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- Title
Gastrointestinal Fermentable Polysaccharide Is Beneficial in Alleviating Loperamide-Induced Constipation in Mice.
- Authors
Liu, Buyu; Zhang, Zhiguo; Liu, Xingquan; Hu, Weiwei; Wu, Weicheng
- Abstract
To investigate the role of gastrointestinal (GI) polysaccharide fermentation in alleviating constipation, two polysaccharide fractions were isolated from a soluble fiber extract with determined anti-constipation activity: a 2.04 kDa neutral fraction (SSP-1) contained 99.29% glucose, and a 41.66 kDa acidic fraction (SSP-2) contained 63.85% uronic acid. After mice were given loperamide for 14 d to induce constipation, the GI transit rate increased significantly in the SSP-1 group (p < 0.05) but not in the SSP-2 group. The stool weight in the SSP-2 group was significantly higher than that in SSP-1 (383.60 mg vs. 226.23 mg) (p < 0.05). Both SSP-1 and SSP-2 groups had significantly increased serum gastrin and motilin levels (p < 0.05) and changes in their fecal short-chain fatty acid (SCFA) profiles, while SSP-1 showed better fermentation properties than SSP-2 in terms of statistically higher fecal contents of acetic acid and total SCFAs (p < 0.05). Bioinformatic analysis indicated that SSP-1 upregulated bacteria such as Oscillibacter to improve SCFA metabolism and stimulate GI hormone secretion, while SSP-2 had less influence on the gut microbiota. These results suggest that the neutral polysaccharide with superior GI fermentation properties exerted beneficial effects on constipation, while the less fermentable pectic fraction might act as a stool-bulking agent.
- Subjects
POLYSACCHARIDES; CONSTIPATION; ANIMAL experimentation; GUT microbiome; ANTIDIARRHEALS; GASTROINTESTINAL diseases; SWEET potatoes; FECES; COMPARATIVE studies; BIOINFORMATICS; DESCRIPTIVE statistics; ACETIC acid; RESEARCH funding; MICE; SHORT-chain fatty acids; FERMENTATION; GASTROINTESTINAL hormones
- Publication
Nutrients, 2023, Vol 15, Issue 20, p4364
- ISSN
2072-6643
- Publication type
Article
- DOI
10.3390/nu15204364