Investigating Glycol-Split-Heparin-Derived Inhibitors of Heparanase: A Study of Synthetic Trisaccharides
作者:Minghong Ni、Stefano Elli、Annamaria Naggi、Marco Guerrini、Giangiacomo Torri、Maurice Petitou
DOI:10.3390/molecules21111602
日期:——
structure glycol-split uronic acid moieties probably responsible for their strong inhibitory activity. We describe here the total chemical synthesis of the trisaccharide GlcNS6S-GlcA-1,6anGlcNS (1) and its glycol-split (gs) counterpart GlcNS6S-gsGlcA-1,6anGlcNS (2) from glucose. As expected, in a heparanase inhibition assay, compound 2 is one order of magnitude more potent than 1. Using molecular modeling
乙酰肝素酶是唯一已知的能够裂解硫酸乙酰肝素的内切糖苷酶。Roneparstat和necuparanib是从肝素中获得的乙酰肝素酶抑制剂,目前正在人类中作为潜在的抗癌药物进行测试,其结构中含有乙二醇分裂的糖醛酸部分,可能是其强大的抑制活性。我们在这里描述了三糖GlcNS6S-GlcA-1,6anGlcNS(1)及其乙二醇拆分(gs)对应物GlcNS6S-gsGlcA-1,6anGlcNS(2)的总化学合成。不出所料,在乙酰肝素酶抑制试验中,化合物2的效力比1高一个数量级。使用分子建模技术,我们创建了1和2的3D模型,并已通过NOESY NMR实验验证。纯合成寡糖已使乙二醇拆分的葡萄糖醛酸的构象得以首次深入研究。以1的结构引入乙二醇拆分单元可增加构象柔韧性,并缩短两种氨基葡萄糖动机之间的距离,从而促进与乙酰肝素酶的相互作用。然而,通过比较2和ronparstat的相对活性,我们可以得出结论,乙