Novel Inhibitors of NRH:Quinone Oxidoreductase 2 (NQO2): Crystal Structures, Biochemical Activity, and Intracellular Effects of Imidazoacridin-6-ones
作者:Mark S. Dunstan、John Barnes、Matthew Humphries、Roger C. Whitehead、Richard A. Bryce、David Leys、Ian J. Stratford、Karen A. Nolan
DOI:10.1021/jm200416e
日期:2011.10.13
the enzyme NQO2. By use of computational molecular modeling, a reliable QSAR was established, relating inhibitory potency with calculated binding affinity. Further, crystal structures of NQO2 containing two of the imidazoacridin-6-ones have been solved. To generate compounds with reduced off-target (DNA binding) effects, an N-oxide moiety was introduced into the tertiary aminoalkyl side chain of the
Imidazoacridin-6-ones 被证明是 NQO2 酶的有效纳摩尔抑制剂。通过使用计算分子模型,建立了可靠的 QSAR,将抑制效力与计算的结合亲和力相关联。此外,已经解决了含有两种 imidazoacridin-6-ones 的 NQO2 的晶体结构。为了生成具有降低的脱靶(DNA 结合)效应的化合物,将N-氧化物部分引入到 imidazoacridin-6-ones 的叔氨基烷基侧链中。这导致一组八种癌细胞系的毒性大大降低,蛋白质结合减少,DNA结合和核积累减少。最后,N个β-氧化物显示出抑制细胞中 NQO2 酶功能的有效能力,因此,它可以作为药理学探针来研究体外和体内酶的特性。