Systematic synthesis and MAG-binding activity of novel sulfated GM1b analogues as mimics of Chol-1 (α-series) gangliosides: highly active ligands for neural siglecs
作者:Hiromi Ito、Hideharu Ishida、Brian E Collins、Susan E Fromholt、Ronald L Schnaar、Makoto Kiso
DOI:10.1016/s0008-6215(03)00245-3
日期:2003.7
Systematic synthesis and myelin-associated glycoprotein (MAG)-binding activity of novel sulfated GM1b analogues structurally related to Chol-1 (alpha-series) gangliosides, high-affinity ligands for neural siglecs, are described. The suitably protected gangliotriose derivatives, 2-(trimethylsilyl)ethyl 2-acetamido-2-deoxy-6-O-levulinoyl-beta-D-galactopyranosyl-(1-->4)-2,3,6-tri-O-benzyl-beta-D-gala
描述了与Chol-1(α系列)神经节苷脂(神经信号的高亲和力配体)结构相关的新型硫酸化GM1b类似物的系统合成和髓鞘相关糖蛋白(MAG)结合活性。适当保护的神经节三糖衍生物2-(三甲基甲硅烷基)乙基2-乙酰氨基-2-脱氧-6-O-乙酰丙酰基-β-D-吡喃半乳糖基-(1→4)-2,3,6-tri-O-苄基-β-D-吡喃半乳糖基-(1→4)-2,3,6-三-O-苄基-β-D-吡喃葡萄糖苷和2-(三甲基甲硅烷基)乙基2-乙酰氨基-2-脱氧-6- O-乙酰丙酰基-β-D-吡喃半乳糖基-(1-> 4)-2,6-二-O-苄基-3-O-乙酰丙酰基-β-D-吡喃半乳糖基-(1-> 4)-2, 3,6-tri-O-苄基-β-D-吡喃葡萄糖苷分别用α-NeuAc-(2-> 3)-半乳糖供体糖基化,得到相应的五糖,分别为94%(仅β1,3糖苷)和90% %(beta1,3:beta1,4 = 2:1),分别。在