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Mar. Drugs 2018, 16(9), 291; https://doi.org/10.3390/md16090291

Structural Features of Sulfated Glucuronomannan Oligosaccharides and Their Antioxidant Activity

1
College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310023, China
2
Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
3
Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266000, China
*
Authors to whom correspondence should be addressed.
Received: 20 July 2018 / Revised: 16 August 2018 / Accepted: 16 August 2018 / Published: 21 August 2018
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Abstract

Glucuronomannan oligosaccharides (Gs) were derived from fucoidan, which was extracted from the brown alga Sargassum thunbergii. Sulfated glucuronomannan oligosaccharides (SGs) were obtained by the sulfation of Gs. NMR techniques were used to reveal that the order of sulfation was Man-C6 > Man-C4 > Man-C1R > GlcA-C3 > Man-C3 > GlcA-C2. Finally, the antioxidant activities (hydroxyl radical scavenging activity, superoxide radical scavenging activity, reducing power and DPPH radical scavenging activity) of Gs and SGs were determined. The findings showed that the higher the degree of polymerization, the better the activity, except for the hydroxyl radical scavenging activity. In addition, the higher the sulfate content, the lower the activities for the reducing power and DPPH radical scavenging activity. Opposite results were found for the superoxide radical scavenging activity. Finally, compared with fucoidan, most Gs and SGs had higher antioxidant activity, suggesting that they might be good candidates for antioxidants. View Full-Text
Keywords: glucuronomannan oligosaccharides; sulfation; antioxidant activity glucuronomannan oligosaccharides; sulfation; antioxidant activity
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Jin, W.; Ren, L.; Liu, B.; Zhang, Q.; Zhong, W. Structural Features of Sulfated Glucuronomannan Oligosaccharides and Their Antioxidant Activity. Mar. Drugs 2018, 16, 291.

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