Novel Analogues of (<i>R</i>)-5-(Methylamino)-5,6-dihydro-4<i>H</i>-imidazo[4,5,1-<i>ij</i>]quinolin-2(1<i>H</i>)-one (Sumanirole) Provide Clues to Dopamine D<sub>2</sub>/D<sub>3</sub> Receptor Agonist Selectivity
作者:Mu-Fa Zou、Thomas M. Keck、Vivek Kumar、Prashant Donthamsetti、Mayako Michino、Caitlin Burzynski、Catherine Schweppe、Alessandro Bonifazi、R. Benjamin Free、David R. Sibley、Aaron Janowsky、Lei Shi、Jonathan A. Javitch、Amy Hauck Newman
DOI:10.1021/acs.jmedchem.5b01612
日期:2016.4.14
in binding and functional studies was lower than previously reported. All analogues were determined to be D2R/D3R agonists in both GoBRET and mitogenesis functional assays. Loss of efficacy was detected for the N-1-substituted analogues at D3R. In contrast, the N-5-alkyl-substituted analogues, and notably the n-butyl-arylamides (22b and 22c), all showed improved affinity at D2R over 1 with neither a
sumanirole的新的1-,5-,和8-取代的类似物(1),多巴胺d 2 / d 3受体(d 2 R / d 3 R)激动剂,合成。当与激动剂放射性配体[ 3 H] 7-羟基-N,N-二丙基-2-氨基四氢萘(7-OH-DPAT)竞争测定时,在D 2 R和D 3 R处的结合亲和力都较高。[ 3 H] N-甲基哌啶。尽管1被确认为D 2R-优先激动剂,它在结合和功能研究中的选择性比以前报道的要低。在G o BRET和有丝分裂发生功能测定中,所有类似物均被确定为D 2 R / D 3 R激动剂。在D 3 R处检测到N -1-取代的类似物的功效下降。相比之下,N -5-烷基取代的类似物,尤其是正丁基芳基酰胺(22b和22c),均显示出改善的亲和力。 D 2 R超过1既不损失功效也不增加选择性。计算建模为D提供了结构基础2的1R选择性1,示出了如何在高度同源的正构结合位点的细微差别(OBS)中差异影响d