<i>N</i>1-Substituted Quinoxaline-2,3-diones as Kainate Receptor Antagonists: X-ray Crystallography, Structure–Affinity Relationships, and in Vitro Pharmacology
作者:Jakob Pallesen、Stine Møllerud、Karla Frydenvang、Darryl S. Pickering、Jan Bornholdt、Birgitte Nielsen、Diletta Pasini、Liwei Han、Laura Marconi、Jette Sandholm Kastrup、Tommy N. Johansen
DOI:10.1021/acschemneuro.8b00726
日期:2019.3.20
Among the ionotropic glutamate receptors, the physiological role of kainate receptors is less well understood. Although ligands with selectivity toward the kainate receptor subtype GluK1 are available, tool compounds with selectivity at the remaining kainate receptor subtypes are sparse. Here, we have synthesized a series of quinoxaline-2,3-diones with substitutions in the N1-, 6-, and 7-position to investigate
在离子型谷氨酸受体中,人们对海藻酸酯受体的生理作用了解得较少。尽管可获得对海藻酸酯受体亚型GluK1具有选择性的配体,但对其余海藻酸酯受体亚型具有选择性的工具化合物稀疏。在这里,我们合成了一系列在N 1、6和7位具有取代基的喹喔啉-2,3-二酮,以研究GluK1-3和GluK5的结构-活性关系(SAR)。在天然和重组海藻酸盐和AMPA受体上的药理学表征表明,化合物37的GluK3结合亲和力(K i)为0.142μM,并且对GluK3的偏好是GluK3的8倍。尽管22对GluK3的结合亲和力较低(K i = 2.91μM),它对GluK3的偏好比对GluK1和GluK2的偏好高> 30倍。用GluK1配体结合结构域使化合物37结晶,以了解SAR。X射线结构显示37种蛋白以开放构象稳定了蛋白,这与拮抗剂结合模式一致。