New diarylsulfonamide inhibitors of Leishmania infantum amastigotes
作者:Myriam González、Pedro José Alcolea、Raquel Álvarez、Manuel Medarde、Vicente Larraga、Rafael Peláez
DOI:10.1016/j.ijpddr.2021.02.006
日期:2021.8
cluster in five chemical classes that provide structure-activityrelationships for further hit improvement and facilitate series development. Molecular docking is consistent with the proposed mechanism of action, supported by the observed structure-activityrelationships, and suggests a potential extension to other Leishmania species due to sequence similarities. A new family of diarylsulfonamides designed
Methoxy and bromo scans on <i>N</i>-(5-methoxyphenyl) methoxybenzenesulphonamides reveal potent cytotoxic compounds, especially against the human breast adenocarcinoma MCF7 cell line
Thirty seven N-(5-methoxyphenyl)-4-methoxybenzenesulphonamide with methoxy or/and bromo substitutions (series 1-4) and with different substituents on the sulphonamide nitrogen have been synthesised. 21 showed sub-micromolar cytotoxicity against HeLa and HT-29 human tumour cell lines, and were particularly effective against MCF7. The most potent series has 2,5-dimethoxyanilines, especially the 4-brominated compounds 23-25. The active compounds inhibit microtubular protein polymerisation at micromolar concentrations, thus pointing at tubulin as the target. Co-treatment with the MDR inhibitor verapamil suggests that they are not MDR substrates. Compound 25 showed nanomolar antiproliferative potency. It severely disrupts the microtubule network in cells and arrests cells at the G2/M cell-cycle phase, thus confirming tubulin targeting. 25 triggered apoptotic cell death, and induced autophagy. Docking studies suggest binding in a distinct way to the colchicine site. These compounds are promising new antitumor agents acting on tubulin.
Novel amino analogs of the trimethoxyphenyl ring in potent colchicine site ligands improve solubility by the masked polar group incorporation (MPGI) strategy
development. We have designed new A ring analogs with chameleonic masked polar amino groups able to increase aqueous solubility and also behave as non-polar through intramolecular hydrogen bonds when bound to tubulin. We have incorporated these new A rings in several scaffolds (sulfonamides, combretastatins, phenstatins, isocombretastatins), synthesized, and assayed 43 representatives. The amino analogs show
秋水仙碱位点抗有丝分裂剂的低水溶性是其临床开发中的一个严重缺陷,其中三甲氧基苯基(A 环)是重要的贡献者。我们设计了新的 A 环类似物,其具有变色龙掩蔽的极性氨基,能够增加水溶性,并且在与微管蛋白结合时通过分子内氢键表现得非极性。我们已将这些新的 A 环整合到几种支架(磺胺类药物、combretastatins、phenstatins、isocombretastatins)中,合成并分析了 43 个代表。氨基类似物显示出改善的水溶性,其中一些(8、60 Z和67) 对人类癌细胞系的纳摩尔抗增殖效力,最有利的取代基是 3-甲基氨基。抗增殖作用与微管蛋白抑制有关,如体外微管蛋白聚合抑制、免疫荧光显微镜检查以及流式细胞术的细胞周期和细胞凋亡分析所示。这些化合物会阻止 G 2中处理过的细胞的细胞周期/M 并随后发展出凋亡反应。对接研究表明在微管蛋白的秋水仙碱位点结合,与新结构变异的 DFT 模型非常一致。3-methylamino-4