Conformational restriction of aryl thiosemicarbazones produces potent and selective anti-Trypanosoma cruzi compounds which induce apoptotic parasite death
作者:Diogo Rodrigo Magalhaes Moreira、Ana Daura Travassos de Oliveira、Paulo André Teixeira de Moraes Gomes、Carlos Alberto de Simone、Filipe Silva Villela、Rafaela Salgado Ferreira、Aline Caroline da Silva、Thiago André Ramos dos Santos、Maria Carolina Accioly Brelaz de Castro、Valéria Rego Alves Pereira、Ana Cristina Lima Leite
DOI:10.1016/j.ejmech.2014.02.001
日期:2014.3
group. Here, we report the structural planning, synthesis and anti-T. cruzi evaluation of new aryl thiosemicarbazones (9a–x), designed as more conformationally restricted compounds. By varying substituents attached to the phenyl ring, substituents were observed to retain, enhance or greatly increase the anti-T. cruzi activity, in comparison to the nonsubstituted derivative. In most cases, hydrophobic
克鲁格氏锥虫引起的恰加斯病是威胁生命的感染,每年导致约12,000人死亡。T. cruzi对硫代半脲类药物很敏感,这使得这类化合物对药物开发具有吸引力。以前,与不带间隔基的芳基硫代半碳氮烷相比,芳基硫代半碳巴唑酮的同系物导致抗克鲁维酵母活性增加。在这里,我们报告了新的芳基硫代半碳杂唑酮(9a – x),被设计为受更多构象限制的化合物。与未取代的衍生物相比,通过改变连接在苯环上的取代基,观察到取代基保留,增强或大大增加了抗克氏锥虫的活性。在大多数情况下,疏水和庞大的取代基(例如溴,联苯和苯氧基)极大地提高了抗寄生虫活性。具体而言,已鉴定出硫半脲酮类化合物,它们抑制了近鞭毛体增殖,并且对锥鞭毛体有毒,而不会影响小鼠脾细胞的生存能力。评估了最有效的抗克鲁维氏锥虫硫半脲酮对克鲁萨因的抗性。但是,未观察到对该酶的抑制,表明该化合物通过另一种机理起作用。另外,检查克鲁维氏梭菌细胞死亡表明,这些硫代半脲