Discovery of Metal Ions Chelator Quercetin Derivatives with Potent Anti-HCV Activities
作者:Dongwei Zhong、Mingming Liu、Yang Cao、Yelin Zhu、Shihui Bian、Jiayi Zhou、Fengjie Wu、Kum-Chol Ryu、Lu Zhou、Deyong Ye
DOI:10.3390/molecules20046978
日期:——
Analogues or isosteres of α,γ-diketoacid (DKA) 1a show potent inhibition of hepatitis C virus (HCV) NS5B polymerase through chelation of the two magnesium ions at the active site. The anti-HCV activity of the flavonoid quercetin (2) could partly be attributed to it being a structural mimic of DKAs. In order to delineate the structural features required for the inhibitory effect and improve the anti-HCV potency, two novel types of quercetin analogues, 7-O-arylmethylquercetins and quercetin-3-O-benzoic acid esters, were designed, synthesized and evaluated for their anti-HCV properties in cell-based assays. Among the 38 newly synthesized compounds, 7-O-substituted derivative 3i and 3-O-substituted derivative 4f were found to be the most active in the corresponding series (EC50 = 3.8 μM and 9.0 μΜ, respectively). Docking studies suggested that the quercetin analogues are capable of establishing key coordination with the two magnesium ions as well as interactions with residues at the active site of HCV NS5B.
α,γ-二酮酸(DKA)1a的类似物或同系物通过螯合活性部位的两个镁离子,显示出对丙型肝炎病毒(HCV)NS5B聚合酶的强效抑制作用。黄酮类化合物槲皮素(2)的抗HCV活性部分可归因于其作为DKA的结构模拟物。为了阐明抑制作用所需的结构特征并提高抗HCV效力,设计、合成了两种新型槲皮素类似物,即7-O-芳甲基槲皮素和槲皮素-3-O-苯甲酸酯,并在基于细胞的实验中评估了它们的抗HCV特性。在38个新合成的化合物中,7-O-取代衍生物3i和3-O-取代衍生物4f在相应系列中最具活性(EC50分别为3.8 μM和9.0 μM)。对接研究表明,槲皮素类似物能够与HCV NS5B活性部位的两个镁离子建立关键配位,并与其残基相互作用。