Structure−Activity Studies for α-Amino-3-hydroxy-5-methyl-4-isoxazolepropanoic Acid Receptors: Acidic Hydroxyphenylalanines
作者:Ronald A. Hill、Lane J. Wallace、Duane D. Miller、David M. Weinstein、Gamal Shams、Henry Tai、Richard T. Layer、David Willins、Norman J. Uretsky、Satyavijayan Narasimhan Danthi
DOI:10.1021/jm950028z
日期:1997.9.1
may have therapeutic potential as psychotropic agents. A series of mononitro- and dinitro-2- and 3-hydroxyphenylalanines was prepared, and their activity compared with willardiine, 5-nitrowillardiine, AMPA, and 2,4,5-trihydroxyphenylalanine (6-hydroxydopa) as inhibitors of specific [3H]AMPA and [3H]kainate binding in rat brain homogenates. The most active compounds were highly acidic (pKa 3-4), namely
α-氨基-3-羟基-5-甲基-4-异恶唑丙酸(AMPA)受体的拮抗剂可能具有治疗精神病的潜力。制备了一系列的单硝基和二硝基-2-和3-羟基苯丙氨酸,并将它们与作为特异性[3H]抑制剂的芥子碱,5-硝基芥子碱,AMPA和2,4,5-三羟基苯丙氨酸(6-羟基多巴)进行比较。大鼠脑匀浆中的AMPA和[3H]海藻酸酯结合。活性最高的化合物是高酸性(pKa 3-4),即2-羟基-3,5-二硝基-DL-苯丙氨酸(13; [3H] AMPA IC50大约等于25 microM)和3-羟基-2, 4-二硝基-DL-苯丙氨酸(19; [3H] AMPA IC50大约等于5 microM)。其他两种二硝基-3-羟基苯丙氨酸和3,5-二硝基-DL-酪氨酸的活性明显较低。酸性较低的各种单硝基羟基苯丙氨酸 也没有活性或无活性,而2-和3-羟基苯丙氨酸(邻-和间-酪氨酸)没有活性。化合物13和19,DL- Willardiine(pKa