In this paper, we describe the synthesis, biochemical properties and biological activity of a series of new 9-substituted acridine derivatives with a reactive alkene moiety: 9-[(E)-2-phenylethenyl] acridine (1) and methyl (2E)-3-(acridin-9-yl)-prop-2-enoate (2). The interaction of derivatives 1 and 2 with calf thymus DNA was investigated using UV-Vis, fluorescence and circular dichroism spectroscopy. The binding constants K were estimated as being in the range of 1.9 to 7.1 × 105 M−1, and the percentage of hypochromism was found to be 40–57% (from spectral titration). UV-Vis, fluorescence, and CD measurements indicate that the compounds were effective DNA-intercalating agents. Electrophoretic separation proved that ligands 1 and 2 relaxed topoisomerase I at a concentration of 5 μM. Ester 2 was shown to have a stronger cytostatic effect on leukemia cell line L1210 than alkene 1. The incubation of ligands 1 and 2 with the ovarian carcinoma cell line A2780 confirmed their extensive cytotoxic effects, an effect which was particularly pronounced in the case of ligand 2. Cytotoxicity tests against A2780 cells demonstrate that a conjugate of compound 2 with L-cysteine (3) is less cytotoxic than compound 2, especially at concentrations greater than 10 μM.
本文介绍了一系列具有活性烯基的 9-取代
吖啶新衍
生物的合成、生化性质和
生物活性:9-[(E)-
2-苯基乙烯基]
吖啶(1)和 (2E)-3-(acridin-9-yl)-prop-2-enoate (2)。利用紫外可见光谱、荧光光谱和圆二色光谱研究了衍
生物 1 和 2 与小牛胸腺 DNA 的相互作用。据估计,结合常数 K 在 1.9 到 7.1 × 105 M-1 之间,低色度百分比为 40-57%(通过光谱滴定)。紫外可见光、荧光和 CD 测量结果表明,这些化合物是有效的 DNA 介导剂。电泳分离证明,
配体 1 和 2 在浓度为 5 μM 时可放松拓扑异构酶 I。与烯烃 1 相比,酯 2 对白血病细胞株 L1210 具有更强的细胞抑制作用。将
配体 1 和 2 与卵巢癌细胞株 A2780 一起培养,证实了它们具有广泛的细胞毒性作用,其中
配体 2 的作用尤为明显。针对 A2780 细胞的细胞毒性测试表明,化合物 2 与
L-半胱氨酸的共轭物(3)的细胞毒性低于化合物 2,尤其是在浓度超过 10 μM 时。