Imidazole-containing amino acids as selective inhibitors of nitric oxide synthases
作者:Younghee Lee、Pavel Martasek、Linda J. Roman、Bettie Sue Siler Masters、Richard B. Silverman
DOI:10.1016/s0968-0896(99)00117-0
日期:1999.9
imidazole-containing amino acids (1a-e and 2a-c), all larger homologues and analogues of L-histidine, were prepared. Since imidazole and phenyl substituted imidazoles have been reported to be inhibitors of NOS and the mode of action of these compounds as heme ligands is a potential mechanism of inhibitory action, we designed imidazole-containing amino acids as combined inhibitors at both the amino acid as well
制备了两个系列的含咪唑的氨基酸(1a-e和2a-c),它们都是L-组氨酸的较大同源物和类似物。由于已经报道了咪唑和苯基取代的咪唑是NOS的抑制剂,并且这些化合物作为血红素配体的作用方式是抑制作用的潜在机制,因此我们设计了含咪唑的氨基酸作为氨基酸的组合抑制剂作为血红素结合位点。为了研究氨基酸部分和咪唑部分之间的距离对抑制效能的影响,这两个官能团之间的碳原子数从2变为6。这类抑制剂的结构活性关系可以与血红素和酶的氨基酸结合位点之间的距离相关。发现在咪唑和氨基酸官能团之间分别具有三个和五个亚甲基的化合物中的两个(1b和1d)是nNOS和iNOS相对于eNOS的有效和选择性抑制剂。当苯基被咪唑的氮取代时,效价和异构体的选择性均降低。