Identification and Structure–Activity Relationship Study of Imidazo[1,2-<i>a</i>]pyridine-3-amines as First Selective Inhibitors of Excitatory Amino Acid Transporter Subtype 3 (EAAT3)
作者:Peng Wu、Walden E. Bjørn-Yoshimoto、Markus Staudt、Anders A. Jensen、Lennart Bunch
DOI:10.1021/acschemneuro.9b00447
日期:2019.10.16
In the present study, screening of a library of 49,087 compounds at the excitatory amino acid transporter subtype 3 (EAAT3) led to the identification of 2-(furan-2-yl)-8-methyl-N-(o-tolyl)imidazo[1,2-a]pyridin-3-amine (3a) which showed a >20-fold preference for inhibition of EAAT3 (IC50 = 13 μM) over EAAT1,2,4 (EAAT1: IC50 ∼ 250 μM; EAAT2,4: IC50 > 250 μM). It was shown that a small lipophilic substituent
在本研究中,在兴奋性氨基酸转运子亚型3(EAAT3)上筛选了49,087个化合物的文库,从而鉴定出2-(呋喃-2-基)-8-甲基-N-(邻甲苯基)咪唑并[1,2一]吡啶-3-胺(3A),其显示出对抑制EAAT3(IC的> 20倍偏好50 = 13μM)以上EAAT1,2,4(EAAT1:IC 50〜250微米; EAAT2 ,4:IC 50 > 250μM)。结果表明,在7位和/或8位上有一个小的亲脂性取代基(甲基或溴)对于活性至关重要。此外,邻甲苯基的取代方式(化合物5b)和2-位取代基的化学性质(化合物7b)对于EAAT3相对于EAAT1,2的选择性至关重要。最突出的类似物来本研究出来是图3a和3e中的显示为EAAT3〜35倍的选择性(IC 50 = 7.2μM)以上EAAT1,2,4(IC 50〜250微米)。