AbstractA series of the 2-nitrochalcones 3a–3k was synthesized and evaluated for cytotoxicity against the human lung adenocarcinoma (A549) and human embryonic kidney (HEK293-T) cell lines using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The 3-(4-fluorophenyl) 3c and the 3-(4-(1,1,2,2-tetrafluoroethoxy)phenyl derivative 3k induced early (25–29%) and late (48–60%) apoptosis of A549 cells as determined by the Annexin V-FITC/PI method. The 3-(4-fluorophenyl) 3c, 3-(4-methoxyphenyl) 3h, 3-(2,3,4-trimethoxyphenyl) 3j and the 3-(4-(1,1,2,2-tetrafluoroethoxy)phenyl derivative 3k were also found to exhibit significant inhibitory activity against vascular endothelial growth factor receptor-2 (VEGFR-2) tyrosine kinase compared to staurosporine (0.035 ± 0.002 µM) or nintedanib (IC50 = 0.021 ± 0.001 µM) with IC50 values of 31.49 ± 0.02, 39.95 ± 0.17, 36.90 ± 0.16 and 29.10 ± 0.16 µM, respectively. Molecular docking studies were also conducted on 3c and 3k as representative models to recognize the hypothetical binding motif of the title compounds within the active site of VEGFR-2.
摘要 合成了一系列 2-硝基查耳酮 3a-3k,并使用 3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四氮唑(MTT)试验评估了它们对人肺癌(A549)和人胚肾(HEK293-T)细胞系的细胞毒性。根据 Annexin V-FITC/PI 法,3-(4-氟苯基)3c 和 3-(4-(1,1,2,2-四氟乙氧基)苯基)衍生物 3k 可诱导 A549 细胞早期(25-29%)和晚期(48-60%)凋亡。研究还发现,3-(4-氟苯基)3c、3-(4-甲氧基苯基)3h、3-(2,3,4-三甲氧基苯基)3j 和 3-(4-(1,1,2,2-四氟乙氧基)苯基)衍生物 3k 对血管内皮生长因子受体-2(VEGFR-2)酪氨酸激酶具有显著的抑制活性,与石杉碱(0.035 ± 0.002 µM)或 nintedanib(IC50 = 0.021 ± 0.001 µM)相比,对血管内皮生长因子受体-2(VEGFR-2)酪氨酸激酶具有明显的抑制活性,IC50 值分别为 31.49 ± 0.02、39.95 ± 0.17、36.90 ± 0.16 和 29.10 ± 0.16 µM。还以 3c 和 3k 为代表模型进行了分子对接研究,以识别标题化合物在 VEGFR-2 活性位点内的假定结合基团。