Antiviral activity evaluation and action mechanism of myricetin derivatives containing thioether quinoline moiety
作者:Qifan Wang、Li Xing、Yuanquan Zhang、Chenyu Gong、Yuanxiang Zhou、Nian Zhang、Bangcan He、Wei Xue
DOI:10.1007/s11030-023-10631-9
日期:——
A variety of myricetin derivatives containing thioether quinoline moiety were designed and synthesized. Their structures of title compounds were determined by 1H NMR, 13C NMR, 19F NMR, and HRMS. Single-crystal X-ray diffraction experiments were carried out with B4. Antiviral activity indicated that some of the target compounds exhibited remarkable anti-tobacco mosaic virus (TMV) activity. In particular, compound B6 possessed significant activity. The half maximal effective concentration (EC50) value of the curative activity of compound B6 was 169.0 μg/mL, which was superior to the control agent ningnanmycin (227.2 μg/mL). Meanwhile, the EC50 value of the protective activity of compound B6 was 86.5 μg/mL, which was better than ningnanmycin (179.2 μg/mL). Microscale thermophoresis (MST) indicated that compound B6 had a strong binding capability to the tobacco mosaic virus coat protein (TMV-CP) with a dissociation constant (Kd) value of 0.013 μmol/L, which was superior to that of myricitrin (61.447 μmol/L) and ningnanmycin (3.215 μmol/L). And the molecular docking studies were consistent with the experimental results. Therefore, these novel myricetin derivatives containing thioether quinoline moiety could become potential alternative templates for novel antiviral agents.
设计并合成了多种含有硫醚喹啉分子的杨梅素衍生物。通过 1H NMR、13C NMR、19F NMR 和 HRMS 确定了标题化合物的结构。对 B4 进行了单晶 X 射线衍射实验。抗病毒活性表明,一些目标化合物具有显著的抗烟草花叶病毒(TMV)活性。其中,化合物 B6 具有显著的活性。化合物 B6 的半数最大有效浓度(EC50)值为 169.0 μg/mL,优于对照药剂宁南霉素(227.2 μg/mL)。同时,化合物 B6 的保护活性 EC50 值为 86.5 μg/mL,优于宁南霉素(179.2 μg/mL)。微尺度热泳(MST)表明,化合物B6与烟草花叶病毒衣壳蛋白(TMV-CP)的结合能力很强,其解离常数(Kd)值为0.013 μmol/L,优于myricitrin(61.447 μmol/L)和宁南霉素(3.215 μmol/L)。分子对接研究结果与实验结果一致。因此,这些含有硫醚喹啉分子的新型杨梅素衍生物可能成为新型抗病毒药物的潜在替代模板。