2-[(4-Phenylpiperazin-1-yl)methyl]imidazo(di)azines as Selective D<sub>4</sub>-Ligands. Induction of Penile Erection by 2-[4-(2-Methoxyphenyl)piperazin-1-ylmethyl]imidazo[1,2-<i>a</i>]pyridine (PIP3EA), a Potent and Selective D<sub>4</sub> Partial Agonist
作者:Cécile Enguehard-Gueiffier、Harald Hübner、Ahmed El Hakmaoui、Hassan Allouchi、Peter Gmeiner、Antonio Argiolas、Maria Rosaria Melis、Alain Gueiffier
DOI:10.1021/jm060166w
日期:2006.6.1
novel 2-[(4-phenylpiperazin-1-yl)methyl]imidazoazines and aza-analogues were prepared and screened at selected dopamine, serotonin, and adrenergic receptor subtypes. 2-Substituted imidazopyridines and pyridazines presented high affinities and selectivities for D4 dopamine receptors. Whereas functional experiments indicated neutral antagonists or weak partial agonist effects for most of the target compounds
制备了一系列新颖的2-[((4-苯基哌嗪-1-基)甲基]咪唑啉和氮杂类似物,并筛选了选定的多巴胺,5-羟色胺和肾上腺素能受体亚型。2-取代的咪唑并吡啶和哒嗪对D4多巴胺受体具有高亲和力和选择性。功能实验表明大多数目标化合物具有中性拮抗剂或弱的部分激动剂作用,而2-甲氧基苯基取代的2-哌嗪基甲基咪唑并吡啶3c(PIP3EA)在促有丝分裂实验和GTPgammaS结合试验中显示出显着的激动剂功效,因此EC50值为3.0(46 %)和4.5 nM(57%)。当对大鼠给药时,我们的D4激动剂3c可在体内诱导阴茎勃起。这种作用被D4选择性拮抗剂L-745,870抑制,证实了其机制途径。