Synthesis and Evaluation of Novel Pyrimido-Acridone, -Phenoxadine, and -Carbazole as Topoisomerase II Inhibitors
作者:Junichi Kamata、Toshimi Okada、Yoshihiko Kotake、Jun Niijima、Katsuji Nakamura、Toshimitsu Uenaka、Atsumi Yamaguchi、Kappei Tsukahara、Takeshi Nagasu、Nozomu Koyanagi、Kyosuke Kitoh、Kentaro Yoshimatsu、Hiroshi Yoshino、Hiroyuki Sugumi
DOI:10.1248/cpb.52.1071
日期:——
As part of a series of studies to discover new topoisomerase II inhibitors, novel pyrimidoacridones, pyrimidophenoxadines, and pyrimidocarbazoles were synthesized, and in vitro and in vivo antitumor activities and DNA-protein and/or DNA-topoisomerase II cross-linking activity as an indicator of topoisomerase II-DNA cleavable complex formation were evaluated. The pyrimidocarbazoles possessed high in vitro and in vivo potencies. Compound 26 (ER-37326), 8-acetyl-2-[2-(dimethylamino)ethyl]-1H-pyrimido[5,6,1-jk]carbazole-1,3(2H)-dione, showed in vitro growth inhibitory activity with respective IC50 values of 0.049 μM and 0.35 μM against mouse leukemia P388 and human oral cancer KB. In vivo, this compound inhibited the tumor growth of mouse sarcoma M5076 implanted into mice with T/C values of 42% and 13% at 3.13 and 6.25 mg/kg/d respectively without significantly affecting the body weight. In addition, compound 26 (ER-37326) increased the formation of DNA-topoisomerase II cross-linking in P388 cells.
作为一系列研究新型拓扑异构酶 II 抑制剂的研究的一部分,合成了新型的吡啶并氨基醌、吡啶并苯氧烷和吡啶并氮杂茚,并评估了其体外和体内的抗肿瘤活性,以及作为拓扑异构酶 II-DNA 可裂解复合物形成指标的 DNA-蛋白质和/或 DNA-拓扑异构酶 II 交联活性。吡啶并氮杂茚具有较高的体外和体内效能。化合物 26(ER-37326),8-乙酰-2-[2-(二甲氨基)乙基]-1H-吡啶并[5,6,1-jk]氮杂茚-1,3(2H)-二酮,显示出对小鼠白血病 P388 和人类口腔癌 KB 的体外增殖抑制活性,IC50 值分别为 0.049 μM 和 0.35 μM。在体内,该化合物对植入小鼠的鼠肉瘤 M5076 的肿瘤生长抑制率为 T/C 值在 3.13 mg/kg/d 和 6.25 mg/kg/d 时分别为 42% 和 13%,且对体重没有显著影响。此外,化合物 26(ER-37326)增加了 P388 细胞中 DNA-拓扑异构酶 II 的交联形成。