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Open AccessArticle

Characterization of Low Molecular Weight Sulfate Ulva Polysaccharide and its Protective Effect against IBD in Mice

1
College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
2
State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3
Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
4
Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
*
Authors to whom correspondence should be addressed.
Mar. Drugs 2020, 18(10), 499; https://doi.org/10.3390/md18100499
Received: 25 August 2020 / Revised: 25 September 2020 / Accepted: 28 September 2020 / Published: 29 September 2020
(This article belongs to the Special Issue Marine Carbohydrate-Based Compounds with Medicinal Properties)
Inflammatory bowel disease (IBD) has been gradually considered a public health challenge worldwide. Sulfated polysaccharides, extracted from seaweed, have been shown to have an anti-inflammatory effect on the disease. In this study, LMW-ulvan, a unique sulfate Ulva polysaccharide with low molecular weight, was prepared using the enzymatic method. The structural characterization of LMW-ulvan and its protective effect on colitis induced by dextran sulfate sodium (DSS) were studied. The results showed that LMW-ulvan with molecular weight of 2.56 kDa consists of 57.23% rhamnose (Rha), 28.76% xylose (Xyl), 7.42% glucuronic acid (GlcA), and 1.77% glucose (Glc). Its backbone contains (1→3,4)-linked Rha, (1→4)-linked Xyl, and (1→4)-linked GlcA with small amounts of (1→4)-linked Rha residues; sulfate substitution was at C-3 of Rha. LMW-ulvan was found to reduce DSS-induced disease activity index, colon shortening, and colonic tissue damage, which were associated with decreased oxidative stresses and inflammation, thus improving the expression of tight junction proteins. These results indicate that LMW-ulvan is able to improve colitis and may be a promising application for IBD. View Full-Text
Keywords: Ulva pertusa; polysaccharides; colitis; anti-inflammatory; antioxidant Ulva pertusa; polysaccharides; colitis; anti-inflammatory; antioxidant
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Li, Y.; Ye, H.; Wang, T.; Wang, P.; Liu, R.; Li, Y.; Tian, Y.; Zhang, J. Characterization of Low Molecular Weight Sulfate Ulva Polysaccharide and its Protective Effect against IBD in Mice. Mar. Drugs 2020, 18, 499.

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