Novel 17β-Substituted Conformationally Constrained Neurosteroids that Modulate GABA<sub>A</sub> Receptors
作者:Charikleia Souli、Nicolaos Avlonitis、Theodora Calogeropoulou、Andrew Tsotinis、Gábor Maksay、Tímea Bíró、Aggeliki Politi、Thomas Mavromoustakos、Alexandros Makriyannis、Heribert Reis、Manthos Papadopoulos
DOI:10.1021/jm050271q
日期:2005.8.1
The goal of this study was to develop a series of allopregnanolone analogues substituted by conformationally constrained 17beta side chains to obtain additional information about the structure-activity relationship of 5alpha-reduced steroids to modulate GABA(A) receptors. Specifically, we introduced alkynyl-substituted 17beta side chains in which the triple bond is either directly attached to the 17beta-position
这项研究的目的是开发一系列由构象约束的17beta侧链取代的allopregnanolone类似物,以获得有关5alpha还原类固醇调节GABA(A)受体的结构-活性关系的其他信息。具体来说,我们引入了炔基取代的17beta侧链,其中三键直接连接到类固醇骨架的17beta-位或21-位。此外,我们研究了C22和C20修饰的影响。通过[[3)H] 4'-乙炔基-4-n-丙基-双环原苯甲酸酯(EBOB)与GABA( A)大鼠小脑突触体膜上的受体。采用了成功应用于离子型甘氨酸受体的变构结合模型。活性最高的衍生物是(20R)-17beta-(1-羟基-2,3-丁二烯基)-5α-雄烷-3-醇(20),其具有低纳摩尔浓度来调节小脑GABA(A)受体,为71活性比对照化合物Allopregnanolone好十倍。进行理论构象分析,以试图将体外结果与最有效的新类似物的活性构象相关联。