Pyrimidopyrimidine derivatives 1 were prepared as rigid thioanalogues of merbarone (a catalytic topoisomerase II inhibitor) and screened as antiproliferative agents against different tumor cell lines. A number of the synthesized compounds emerged as cytotoxic in cell-based assays (MT-4, HeLa and MCF-7 cells) at low micromolar concentrations. In a National Cancer Institute screening, selected member
嘧啶嘧啶衍
生物1制备了作为Merbarone(催化拓扑异构酶II
抑制剂)的刚性
硫代类似物,并筛选了针对不同肿瘤
细胞系的抗增殖剂。在低微摩尔浓度下,许多合成的化合物在基于细胞的测定(
MT-4,HeLa和MCF-7细胞)中以细胞毒性出现。在美国国家癌症研究所的一次筛查中,该系列的选定成员显示出对各种肿瘤(黑素瘤,肾癌,中枢神经系统癌,结肠癌和乳腺癌)的广泛抗增殖活性。
嘧啶嘧啶骨架7位取代基的酸碱和空间位阻会严重影响其效能。酶促测定法证明,受测试的衍
生物的一个子集有效地抑制了拓扑异构酶IIα,这与美巴龙的作用机理有关。