Biomimetic Synthesis of the Tumor-Associated (2,3)-Sialyl-T Antigen and Its Incorporation into Glycopeptide Antigens from the Mucins MUC1 and MUC4
作者:Sebastian Dziadek、Constanze Brocke、Horst Kunz
DOI:10.1002/chem.200400228
日期:2004.9.6
Among the tumor-associated saccharide antigens, the (2,3)-sialyl-T antigen has been identified as the most abundant glycan, found in several different carcinoma cell lines. According to a linear biomimetic strategy, the (2,3)-sialyl-T antigen was synthesized by a stepwise glycan chain extension of a protected galactosamine-threonine precursor. For the construction of immunostimulating antigens combining
上皮肿瘤细胞上的糖蛋白通常表现出异常的糖基化特征。由葡糖胺转移的下调和唾液酸化过早导致的聚糖侧链的不完全形成导致另外的肽表位,其在粘蛋白型糖蛋白中变得可为免疫系统所接近。这些癌症特异性结构改变被认为是对肿瘤细胞进行选择性免疫攻击的有前途的基础。在与肿瘤相关的糖抗原中,(2,3)-唾液酸-T抗原已被确定为最丰富的聚糖,存在于几种不同的癌细胞系中。根据线性仿生策略,通过保护的半乳糖胺-苏氨酸前体的逐步聚糖链延伸合成(2,3)-唾液酸-T抗原。