Studies on Selectin Blockers. 5. Design, Synthesis, and Biological Profile of Sialyl Lewis x Mimetics Based on Modified Serine−Glutamic Acid Dipeptides
作者:Takahiro Tsukida、Yasuyuki Hiramatsu、Hideki Tsujishita、Takao Kiyoi、Masahiro Yoshida、Kiriko Kurokawa、Hideki Moriyama、Hiroshi Ohmoto、Yukihisa Wada、Tadayuki Saito、Hirosato Kondo
DOI:10.1021/jm970262k
日期:1997.10.1
rationally designed a sLe(x) mimetic based on molecular modeling, synthesized type II and type II' beta-turn dipeptides (3a,b), and evaluated their biological profiles both in vitro and in vivo. Against E-selectin-sLe(x) binding, the type II beta-turn dipeptide L-Ser-D-Glu 3a (IC50, 13 microM) and the type II' beta-turn dipeptide D-Ser-L-Glu 3b (IC50, 5.5 microM) were 20-100-fold more potent blockers than
我们基于分子模型合理设计了sLe(x)模拟物,合成了II型和II'型β-转二肽(3a,b),并在体外和体内评估了它们的生物学特性。针对E-选择素-sLe(x)结合,II型β-转二肽L-Ser-D-Glu 3a(IC50,13 microM)和II'β-转二肽D-Ser-L-Glu 3b( IC50(5.5 microM)比sLe(x)(1; IC50,600 microM)和3'-硫酸化Le(x)类似物(2; IC50,280 microM)强效阻滞剂高20-100倍。另一方面,其他立体异构体(例如L-Ser-L-Glu 3c和D-Ser-D-Glu 3d)是非常弱的阻滞剂,3c,d的IC50> 1000 microM。相对于P-和L-选择素,尽管化合物3a-d的立体化学差异很大,但二肽3a-d的阻滞剂均比sLe(x)或化合物2强。在小鼠模型中,化合物3b提供了针对免疫球蛋白E介导的皮肤反