phenotypes. Compound 15h had excellent activity as an inhibitor of tubulin polymerization. Concentration-dependent cell cycle analyzes by flow cytometry confirmed that KB/HeLa cells treated by 15h and 16b were arrested in the G2/M phases of the cell cycle. In competition experiments, 15h strongly displaced radiolabeled colchicine from its binding site on tubulin, showing IC50 values similar to that of
合成了一系列新颖的苯基亚
氨基-10 H-
蒽-9-酮和9-(苯基hydr)-9,10-
蒽二酮,并评估了其与微管蛋白的相互作用以及对一组人类肿瘤
细胞系的细胞毒性。10-(3-羟基-4-甲氧基-苯基亚
氨基)-10 H-
蒽-9-一15h及其二
氯类似物16b被鉴定为有效的肿瘤细胞生长
抑制剂(16b,IC 50 K562 0.11μM),包括多药抗性表型。化合物15h作为微管蛋白聚合的
抑制剂具有优异的活性。通过流式细胞仪进行浓度依赖的细胞周期分析,确认KB / HeLa细胞经过15h和30h处理16b被捕入细胞周期的G2 / M期。在竞争实验中,放射性标记的
秋水仙碱在微管蛋白的结合位点15h发生了强烈置换,显示出与
秋水仙碱相似的IC 50值。获得的结果证明抗增殖活性与微管蛋白聚合的抑制有关。