Structure–Activity Relationship in Monosaccharide-Based Toll-Like Receptor 4 (TLR4) Antagonists
作者:Fabio A. Facchini、Lenny Zaffaroni、Alberto Minotti、Silvia Rapisarda、Valentina Calabrese、Matilde Forcella、Paola Fusi、Cristina Airoldi、Carlotta Ciaramelli、Jean-Marc Billod、Andra B. Schromm、Harald Braun、Charys Palmer、Rudi Beyaert、Fabio Lapenta、Roman Jerala、Grisha Pirianov、Sonsoles Martin-Santamaria、Francesco Peri
DOI:10.1021/acs.jmedchem.7b01803
日期:2018.4.12
The structure–activity relationship was investigated in a series of synthetic TLR4 antagonists formed by a glucosamine core linked to two phosphate esters and two linear carbon chains. Molecular modeling showed that the compounds with 10, 12, and 14 carbons chains are associated with higher stabilization of the MD-2/TLR4 antagonist conformation than in the case of the C16 variant. Binding experiments
在一系列合成的TLR4拮抗剂中研究了结构-活性关系,该拮抗剂由连接至两个磷酸酯和两个线性碳链的葡糖胺核心形成。分子模型表明,与C16变体相比,具有10、12和14个碳链的化合物与MD-2 / TLR4拮抗剂构象的更高稳定性相关。与人MD-2的结合实验表明C12和C14变体比C10具有更高的亲和力,而C16变体不与蛋白质相互作用。除C16变体外,这些分子均抑制人和鼠细胞中LPS刺激的TLR4信号,并且拮抗剂的功效反映了从体外计算得出的MD-2亲和力绑定实验。傅里叶变换红外光谱,核磁共振和小角度X射线散射测量表明,水溶液中的聚集状态取决于脂肪酸链的长度,并且该性质会影响该系列化合物中的TLR4活性。