The First Total Synthesis of Ganglioside GalNAc-GD1a, a Target Molecule for Autoantibodies in Guillain-Barré Syndrome
作者:Kohki Fujikawa、Shinya Nakashima、Miku Konishi、Tomoaki Fuse、Naoko Komura、Takayuki Ando、Hiromune Ando、Nobuhiro Yuki、Hideharu Ishida、Makoto Kiso
DOI:10.1002/chem.201003357
日期:2011.5.9
The first synthesis of ganglioside GalNAc‐GD1a, featuring efficient glycan assembly and a cyclic glucosyl ceramide as a versatile unit for ganglioside synthesis is described. Although ganglioside GalNAc‐GD1a was first found as a brain ganglioside, IgG autoantibodies to GalNAc‐GD1a were subsequently found to be closely related to a human peripheral‐nerve disorder, Guillain–Barré syndrome, which is the
描述了神经节苷脂GalNAc-GD1a的首次合成,其特征在于有效的聚糖装配和环状葡萄糖基神经酰胺作为神经节苷脂合成的通用单元。尽管神经节苷脂GalNAc-GD1a最初是作为脑神经节苷脂发现的,但后来发现针对GalNAc-GD1a的IgG自身抗体与人类外周神经疾病-格林-巴雷综合征(Guillain-Barrésyndrome)密切相关,后者是全球急性弛缓性麻痹的最常见原因。在这项研究中,带有两个唾液酸残基的特征性六糖部分是通过使用易于获得的GM2核心单元作为通用单元而有效合成的。寡糖和神经酰胺部分的潜在困难偶联是通过使用环状葡萄糖基神经酰胺作为六糖部分的偶联伴侣进行的,从而成功地提供了目标化合物的框架。整体脱保护得到了均质的神经节苷脂GalNAc-GD1a。酶联免疫吸附试验显示,患有格林-巴利综合征的患者的血清与天然和合成的GalNAc-GD1a均发生了反应。