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A comparison study on polysaccharides extracted from Laminaria japonica using different methods: structural characterization and bile acid-binding capacity

Abstract

In this study, the structural characterization and bile acid-binding capacity of Laminaria japonica polysaccharides (LP), obtained by seven different extraction methods, were investigated. The results indicated that extraction methods exhibited significant effects on extraction yield, molecular weight, monosaccharides composition and the content of neutral sugar, fucose, uronic acid and sulfate of LP. AFM analysis indicated that LP extracted by different methods appeared certain different, flexible and worm-like chains with many branches. Rheological measurements showed that the LP, obtained by pressurized hot water extraction and acid assisted extraction, exhibited lower viscosity due to their lower molecular weight, compared with other extracted polysaccharides. The bile acid-binding capacity of acid assisted extracted LP was significantly higher than other LP samples tested, which was probably ascribed to its highly branched structure, low molecular weight, low viscosity and abundant uronic acid and fucose in total monosaccharides. The present study provides scientific evidences and advances in the preparation technology and a hypolipidemic activities evaluation method for L. japonica polysaccharides.

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Publication details

The article was received on 10 Feb 2017, accepted on 14 Jun 2017 and first published on 15 Jun 2017


Article type: Paper
DOI: 10.1039/C7FO00218A
Citation: Food Funct., 2017, Accepted Manuscript
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    A comparison study on polysaccharides extracted from Laminaria japonica using different methods: structural characterization and bile acid-binding capacity

    J. Gao, L. Lin, B. Sun and M. Zhao, Food Funct., 2017, Accepted Manuscript , DOI: 10.1039/C7FO00218A

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