Increasing the binding affinity of VEGFR-2 inhibitors by extending their hydrophobic interaction with the active site: Design, synthesis and biological evaluation of 1-substituted-4-(4-methoxybenzyl)phthalazine derivatives
作者:Wagdy M. Eldehna、Sahar M. Abou-Seri、Ahmed M. El Kerdawy、Rezk R. Ayyad、Abdallah M. Hamdy、Hazem A. Ghabbour、Mamdouh M. Ali、Dalal A. Abou El Ella
DOI:10.1016/j.ejmech.2016.02.029
日期:2016.5
promising activity (IC50 = 0.636–5.76 μM). Molecular docking studies guidance was used to improve the binding affinity for series 4a–j towards VEGFR-2 active site. This improvement was achieved by increasing the hydrophobic interaction with the hydrophobic back pocket of the VEGFR-2 active site lined with the hydrophobic side chains of Ile888, Leu889, Ile892, Val898, Val899, Leu1019 and Ile1044. Increasing
最初合成了一系列 苯并酞菁衍生物4a – j,并测试了其对VEGFR-2的抑制活性,并显示出有希望的活性(IC 50 = 0.636–5.76μM)。分子对接研究指南用于改善4a – j系列的结合亲和力朝向VEGFR-2活性位点。通过增加与衬有Ile888,Leu889,Ile892,Val898,Val899,Leu1019和Ile1044的疏水性侧链的VEGFR-2活性位点的疏水性后口袋的疏水性相互作用,实现了这一改进。疏水相互作用的增强是通过将带有取代苯基部分的苯胺基酞嗪支架通过一个uriedo接头延伸而实现的,这应为该延伸提供足够的灵活性,以使其自身能够深深地容纳在疏水性后袋中。按计划,设计的尿酸-苯胺基酞嗪7a – i的结合亲和力比其苯胺基 酞嗪母体好(IC 50 = 0.083–0.473μM)。特别是化合物7g – i的IC 50分别为0.086、0.083和0.086μM,优于参考药物索拉非尼(IC