Interactions of human serum albumin with bioactive 3H-imidazo[4,5-a]acridines: Insights from fluorescence spectroscopic studies
作者:Maryam Rahbari、Mehdi Pordel、Jamshidkhan Chamani
DOI:10.1134/s1068162016010131
日期:2016.1
confirmed by IR, 1H NMR, and mass spectral data. The interactions of 3H-imidazo[4,5-a]acridines with human serum albumin (HSA) were studied by fluorescence spectroscopy. The binding of 3H-imidazo[4,5-a]acridines quenches the HSA fluorescence, revealing a 1: 1 interaction with a binding constant of about 2.34 × 105–3.16 × 106 M–1. A decrease in fluorescence intensity at 339 nm, when excited at 280 nm, is
通过咪唑并[4,5-a]吖啶酮在沸腾的POCl3中反应,可以方便地合成几种3H-咪唑并[4,5-a]吖啶衍生物。咪唑并吖啶酮通过 3H-咪唑并[4',5':3,4]苯并[c]异恶唑在含有亚硝酸的浓硫酸中在室温下重排获得。所有新合成化合物的结构均通过 IR、1H NMR 和质谱数据确认。通过荧光光谱研究了 3H-咪唑并[4,5-a]吖啶与人血清白蛋白 (HSA) 的相互作用。3H-咪唑并[4,5-a]吖啶的结合淬灭了 HSA 荧光,显示出 1:1 的相互作用,结合常数约为 2.34 × 105–3.16 × 106 M–1。当在 280 nm 激发时,339 nm 处的荧光强度降低,归因于配体的存在引起的蛋白质荧光团环境的变化。3H-咪唑并[4,5-a]吖啶与HSA相互作用的差异使用荧光分光光度法技术观察。