Synthesis and inhibitory activity of a di- and a trisaccharide corresponding to an erythrocyte glycolipid responsible for the nor polyagglutination
作者:Ulrika Westerlind、Per Hagback、Maria Duk、Thomas Norberg
DOI:10.1016/s0008-6215(02)00222-7
日期:2002.9
The polyagglutinable erythrocytes NOR contain unusual neutral glycolipids reactive with anti-NOR antibodies. The disaccharide alpha-D-Galp-(1-->4)-D-GalpNAc and the trisaccharide alpha-D-Galp-(1-->4)-beta-D-GalpNAc-(1-->3)-D-Gal corresponding to the non-reducing end of a NOR glycolipid (NOR1) were chemically synthesized. The syntheses were based on a common (1-->4)-beta-D-GalNAc precursor, and utilized benzyl glycoside and benzyl ether functions for persistent blocking of hydroxyls. The alpha-D-Galp-(1-->4)-beta-D-GalpNAc structural element has been found only recently in Nature, and derivatives thereof have not been synthesized before. Both the synthesized oligosaccharides inhibited specifically human anti-NOR antibodies, the trisaccharide being 300 times more active than the disaccharide. (C) 2002 Elsevier Science Ltd. All rights reserved.