Enhancing Action of Positive Allosteric Modulators through the Design of Dimeric Compounds
作者:Thomas Drapier、Pierre Geubelle、Charlotte Bouckaert、Lise Nielsen、Saara Laulumaa、Eric Goffin、Sébastien Dilly、Pierre Francotte、Julien Hanson、Lionel Pochet、Jette Sandholm Kastrup、Bernard Pirotte
DOI:10.1021/acs.jmedchem.8b00250
日期:2018.6.28
The present study describes the identification of highly potent dimeric 1,2,4-benzothiadiazine 1,1-dioxide (BTD)-type positive allosteric modulators of the AMPA receptors (AMPApams) obtained by linking two monomeric BTD scaffolds through their respective 6-positions. Using previous X-ray data from monomeric BTDs cocrystallized with the GluA2 ligand-binding domain (LBD), a molecular modeling approach
本研究描述了通过将两个单体BTD支架通过各自的6位连接而获得的AMPA受体(AMPApams)的强力二聚1,2,4-苯并噻二嗪1,1-二氧化物(BTD)型正变构调节剂的鉴定。使用先前与GluA2配体结合域(LBD)共结晶的单体BTD的X射线数据,进行了分子建模方法来预测优选的二聚体组合。制备了两种6,6-乙烯连接的二聚BTD化合物(16和22),并在表达GluA2 o的HEK293细胞上作为AMPApams进行了评估(Q)(钙通量实验)。发现这些化合物的效力是其各自单体的约10,000倍,活性最高的二聚化合物是双4-环丙基取代的化合物22 [6,6'-(乙烷-1,2-二基)双(4) -环丙基-3,4-二氢-2 H -1,2,4-苯并噻二嗪1,1-二氧化物],EC 50值为1.4 nM。化合物16(EC 50 = 13 nM)已成功与GluA2 o -LBD共结晶,发现在LBD二聚体界面上占据了两个BTD结合位点。