Structural characterization of a novel polysaccharide from Sargassum thunbergii and its antioxidant and anti-inflammation effects

Autoři: Dianhui Luo aff001;  Zhaojing Wang aff001;  Kaiying Nie aff001
Působiště autorů: Department of Bioengineering and Biotechnology, Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, People’s Republic of China aff001
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article


A novel polysaccharide STSP-I was isolated and purified from Sargassum thunbergii. Its structure and bioactivity were studied using gas chromatography (GC), fourier transform infrared spectroscopy (FTIR), periodate oxidation-smith degradation, partial acid hydrolysis, methylation-GC-MS, nuclear magnetic resonance (NMR), transmission electron microscopy (TEM), radicals scavenging assays and anti-inflammatory assays. STSP-I was consisted of fucose and galactose with a molar ratio of 1.2:1, and its mass was 373 kDa. The main structural components of STSP-I were →4)-α-D-Galp-(1→ and →3)-β-L-Fucp-(1→, STSP-I was a non-branched polysaccharide, and TEM further revealed the existence of entangled chains and linear forms. Compared with Vitamin C (Vc), STSP-I showed a higher scavenging effect of superoxide radical (EC50 = 0.22 mg/mL) and an equivalent scavenging effect of hydroxyl radical (EC50 = 0.88 mg/mL). STSP-I also exhibited good inhibitory effects of TNF-α, IL-6 and COX-2 mRNA expressions in LPS-stimulated RAW 264.7 mouse macrophage cells, and the inhibitory effects were more than 91% at the concentrations of 75 and 150 μg/ml. The results indicate that the polysaccharide STSP-I from S. thunbergii with the linear structure may serve as potential antioxidant and anti-inflammatory agents.

Klíčová slova:

Antioxidants – Macrophages – Methylation – Polysaccharides – Galactose – Hydroxyl radicals – Total correlation spectroscopy – Hydrolysis


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2019 Číslo 10
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