申请人:Neurogen Corporation
公开号:US05597920A1
公开(公告)日:1997-01-28
The present invention provides methods for screening drug compounds utilizing compounds of formulas I and II, where formulas I and II are ##STR1## and the pharmaceutically acceptable salts thereof where: R.sub.1, R.sub.2, R.sub.3, and R.sub.4 represent hydrogen, halogen, alkyl or alkoxy substituents; R5 is hydrogen or lower alkyl; X and Y represent hydrogen, halogen, alkyl or alkoxy substituents; and Z is hydrogen or fluorine. The invention also provides tritium or iodine isotope radiolabeled compounds of the formulas I and II radiolabeled with tritium or isotopes of iodine. The invention further provides novel GABAa receptor subtypes which specifically bind to compounds of formulas I or II. The invention also provides GABAa receptor subtypes which are bound in situ to a compound of formula I or II. The compounds provided herein bind selectively to a novel subtype of the GABAa binding site. Selective interaction of ligands at this unique receptor population results in pharmacological specificity which may lead to superior anxiolytics, cognition enhancers, anticonvulsants and sedative hypnotics.
本发明提供了利用I和II式化合物进行筛选药物化合物的方法,其中I和II式化合物为##STR1##以及其药学上可接受的盐,其中:R.sub.1、R.sub.2、R.sub.3和R.sub.4代表氢、卤素、烷基或烷氧基取代基;R5代表氢或较低的烷基;X和Y代表氢、卤素、烷基或烷氧基取代基;Z代表氢或氟。本发明还提供了用氚或碘同位素标记的I和II式化合物的同位素标记化合物。本发明还提供了新的GABAa受体亚型,其特异地结合于I或II式化合物。本发明还提供了与I或II式化合物在体内结合的GABAa受体亚型。本文提供的化合物选择性地结合于GABAa结合位点的新亚型。配体在这种独特的受体群体上的选择性相互作用导致了药理学特异性,可能导致更优异的抗焦虑药、认知增强剂、抗癫痫药和镇静催眠剂。