Fucosylated chondroitin sulfate from the sea cucumber Hemioedema spectabilis: structure and influence on cell adhesion and tubulogenesis

Publication date: Available online 20 January 2020Source: Carbohydrate PolymersAuthor(s): Nadezhda E. Ustyuzhanina, Maria I. Bilan, Andrey S. Dmitrenok, Alexander S. Shashkov, Nora M.A. Ponce, Carlos A. Stortz, Nikolay E. Nifantiev, Anatolii I. UsovAbstractFucosylated chondroitin sulfate (FCS) HeSp was isolated from the Patagonian sea cucumber Hemioedema spectabilis. Ion-exchange chromatography was applied for purification of the FCS from the crude extract of sulfated polysaccharides. Analysis of monosaccharide and sulfate content of HeSp revealed the molar ratio of GlcA:GalNAc:Fuc:SO3Na as 1.15:1:1.1:3.9. Molecular weight of HeSp (44.1 kDa) was determined by GPC. According to the NMR spectral data, the main fragment of HeSp was the trisaccharide →3)-β-d-GalNAc-(1→4)-β-d-GlcA(3-O-α-l-Fuc)-(1→, where GalNAc units were sulfated either at O-4, at O-6 or both at O-4 and O-6. The fucosyl branches attached to O-3 of GlcA showed also different patterns of sulfation: Fucp2S4S, Fucp4S and Fucp3S4S were found in a ratio of 3.8:1.5:1. Besides, small amounts of the disaccharide fragment 3)-β-d-GalNAc-(1→4)-β-d-GlcA3S-(1→ were observed in a structure of HeSp. The polysaccharide was found to block cancer cells adhesion to platelet-coated surface and to inhibit tubulogenesis, thus demonstrating the potential antitumor activity.
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research