Inhibitors of human topoisomerase II (Top2) are the backbone of numerous cancer chemotherapy regimens. Unfortunately, the onset of toxicity severely limits the utility of these powerful drugs. There is some conservation between human Top2 and bacterial homologues (DNA gyrase and TopoIV). Thus, the conversion of antibacterial topoisomerase inhibitors into antineoplastic agents is an intriguing strategy for anticancer compounds. Herein is described the conversion of deoxynybomycin (DNM), a natural product and DNA gyrase inhibitor with minimal cytotoxicity, into a compound that has anticancer activity. Detailed in vitro and cell culture experiments demonstrate that these compounds inhibit Top2 and also act upon topoisomerase I. Similar approaches are applicable to other classes of gyrase inhibitors and other antibacterial targets for discovery of new anticancer drugs.
人类拓扑异构酶II(Top2)的
抑制剂是许多癌症化疗方案的基础。不幸的是,毒性的发生严重限制了这些强效药物的实用性。人类Top2和细菌同源物(DNA旋转酶和TopoIV)之间存在一定的保守性。因此,将抗菌拓扑异构酶
抑制剂转化为
抗肿瘤药物是一种有趣的抗癌化合物策略。本文描述了将脱氧尼
伯霉素(DNM),一种
天然产物和DNA旋转酶
抑制剂,转化为具有抗癌活性的化合物。详细的体外和
细胞培养实验证明这些化合物抑制Top2,同时也对拓扑异构酶I起作用。类似的方法适用于其他类别的旋转酶
抑制剂和其他抗菌靶标,用于发现新的抗癌药物。