Carboxylic Acid Derivatives of Amlexanox Display Enhanced Potency toward TBK1 and IKK<i>ε</i> and Reveal Mechanisms for Selective Inhibition
作者:Tyler S. Beyett、Xinmin Gan、Shannon M. Reilly、Louise Chang、Andrew V. Gomez、Alan R. Saltiel、Hollis D. Showalter、John J. G. Tesmer
DOI:10.1124/mol.118.112185
日期:2018.10
inflammation, albeit with moderate potency, necessitating the need for improved analogs. Herein we report crystal structures of TBK1 in complex with amlexanox and a series of analogs that modify its carboxylic acid moiety. Removal of the carboxylic acid or mutation of the adjacent Thr156 residue significantly reduces potency toward TBK1, whereas conversion to a short amide or ester nearly abolishes the inhibitory
慢性低度炎症是肥胖症的标志,肥胖症是发生2型糖尿病的危险因素。药物氨lexanox抑制IκB激酶ε(IKKε)和TANK结合激酶1(TBK1),以促进能量消耗并改善胰岛素敏感性。临床研究表明,对于一部分患有潜在脂肪组织炎症的糖尿病患者,尽管效力适中,但仍需要改进的类似物。本文中,我们报告了TBK1的晶体结构与氨纶和一系列修饰其羧酸部分的类似物的复合物。羧酸的去除或相邻Thr156残基的突变显着降低了对TBK1的效力,而转化为短酰胺或酯几乎消除了抑制作用。IKKε受这些修改的影响较小,可能是由于其铰链发生了变化,从而增加了构象可塑性。安装四唑羧酸生物甾醇对IKKε和TBK1的效力分别提高到200和400 nM。尽管体外效能有所改善,但在脂肪细胞中,没有任何类似物会比氨lexanox产生更大的反应,这可能是因为吸收和分布发生了变化。本文所述的结构-活性关系和共晶体结构将有助于将来使用氨lexa