Design, Synthesis, and Pharmacological Characterization of Novel, Potent NMDA Receptor Antagonists
作者:Paola Conti、Marco De Amici、Giovanni Grazioso、Gabriella Roda、Federico F. Barberis Negra、Birgitte Nielsen、Tine B. Stensbøl、Ulf Madsen、Hans Bräuner-Osborne、Karla Frydenvang、Giovambattista De Sarro、Lucio Toma、Carlo De Micheli
DOI:10.1021/jm049409f
日期:2004.12.1
The two diastereomeric pairs of acidic amino acids 5-(2-amino-2-carboxyethyl)-4,5-dihydroisoxazole-3-carboxylic acid (8A/8B) and 4-(2-amino-2-carboxyethyl)-5,5-dimethyl-4,5-dihydroisoxazole-3-carboxylic acid (10A/10B) were prepared via a strategy based on a 1,3-dipolar cycloaddition. The four amino acids were tested at ionotropic and metabotropic glutamate receptors. None of the compounds was active
酸性氨基酸5-(2-氨基-2-羧乙基)-4,5-二氢异恶唑-3-羧酸(8A / 8B)和4-(2-氨基-2-羧乙基)-5的两个非对映异构体对,通过基于1,3-偶极环加成的策略制备5-二甲基-4,5-二氢异恶唑-3-羧酸(10A / 10B)。在离子型和代谢型谷氨酸受体上测试了这四个氨基酸。这些化合物都没有以1 mM的活性对代谢型受体(在CHO细胞系中表达的mGluR1,-2,-4和-5)有活性,既没有激动剂也没有拮抗剂。相反,当在离子型谷氨酸受体上测试时,一对立体异构体8A / 8B对NMDA受体显示出显着的亲和力,拮抗力和选择性。事实证明,8A的亲和力是非对映体8B的亲和力的5倍(K(i)值分别为0.21和0.96 microM)。此外,在DBA / 2小鼠体内试验中,化合物8A和8B表现出值得注意的抗惊厥活性。衍生物10A对所有离子型谷氨酸受体均无活性,而其立体异构体10B则与NMDA和AMPA受体均具有可捕捉的结合。