Small Cause, Great Impact: Modification of the Guanidine Group in the RGD Motif Controls Integrin Subtype Selectivity
作者:Tobias G. Kapp、Maximilian Fottner、Oleg V. Maltsev、Horst Kessler
DOI:10.1002/anie.201508713
日期:2016.1.22
and its positive charge, the guanidine group is an important pharmacophoric group and often used in synthetic ligands. The chemical modification of the guanidine group is often considered to destroy its function. Herein, we show that the N‐methylation, N‐alkylation, or N‐acylation of the guanidine group can be used to modify the receptor subtype specificity of the integrin ligand cilengitide. Using the
由于其作为氢键供体的独特作用及其正电荷,胍基是重要的药效基团,通常用于合成配体中。通常认为胍基团的化学修饰破坏了其功能。在这里,我们表明胍基的N-甲基化,N-烷基化或N-酰化可用于修饰整联蛋白配体西仑吉肽的受体亚型特异性。使用αvβ6/α5β1双选择性配体c(isoDGRkphg)和αvβ6特异性配体c(FRGDLAFp(NMe)K(Ac)为例,我们表明可以通过这种方法微调配体的结合亲和力,以增强对αvβ6的选择性。此外,我们描述了一种整合素配体功能化的新策略。通过引入更长的N-烷基胍和N-酰基胍基团,我们能够同时鉴定迄今未知的锚定点并增强配体的亚型选择性。