Search for Selective Glua1 Ampa Receptor Antagonists in a Series of Dicationic Compounds
作者:V. E. Gmiro、A. S. Zhigulin
DOI:10.1007/s11094-022-02635-w
日期:2022.6
Homologous series of dicationic derivatives based on adamantyl and phenylcyclohexyl fragments in which the cationic groups and the distance between them were varied by using hydrocarbon chains five or six methylene units in length were synthesized. The ability of the dications to block open channels of NMDA and AMPA glutamate receptors was investigated. Pyramidal neurons isolated from the hippocampal CA1 zone were used to study the NMDA channels. Giant cholinergic interneurons of striatum were used in studies of AMPA receptors missing GluA2 subunits. An investigation of the structure—activity relationship of the dications revealed five compounds (IEM-2131, -2132, -2133, -2041, -2297) that surpassed the reference GluA1 AMPA antagonist IEM-1460 in terms of GluA1 AMPA selectivity. IEM-2131, which was an order of magnitude more active than IEM-1460 in AMPA-blocking activity (IC50 = 0.29 and 3 μM, respectively), showed the maximum AMPA activity and selectivity and had five times better AMPA selectivity (101- and 500-fold, respectively). The clinical prospects of the new GluA1 AMPA blockers were discussed.
基于金刚烷和苯基环己烷片段,通过合成长度为5或6个亚甲基单元的烃链,我们获得了阳离子基团及其间距各异的同源二阳离子衍生物系列。我们研究了二阳离子阻断NMDA和AMPA谷氨酸受体开放通道的能力。从海马CA1区分离出的锥体神经元被用于研究NMDA通道。纹状体中的巨大型胆碱能中间神经元被用于研究缺失GluA2亚基的AMPA受体。对二阳离子的结构-活性关系的研究表明,有五种化合物(IEM-2131、-2132、-2133、-2041、-2297)在GluA1 AMPA选择性方面超过了参考GluA1 AMPA拮抗剂IEM-1460。IEM-2131在AMPA阻断活性(IC50分别为0.29和3μM)方面比IEM-1460高出一个数量级,显示出最大的AMPA活性和选择性,并且AMPA选择性提高了5倍(分别为101倍和500倍)。我们讨论了新型GluA1 AMPA阻断剂的临床前景。