Mitomycin C linked to DNA minor groove binding agents: synthesis, reductive activation, DNA binding and cross-linking properties and in vitro antitumor activity
作者:Manuel M Paz、Arunangshu Das、Maria Tomasz
DOI:10.1016/s0968-0896(99)00223-0
日期:1999.12
Mitomycin C (MC) is a natural cytotoxic agent used in clinical anticancer chemotherapy. Its antitumor target appears to be DNA. Upon bioreductive activation MC alkylates and cross-links DNA. MC derivatives were synthesized in which MC was linked to DNA minor groove binding agents, analogous to netropsin and distamycin. One, two and three N-methylpyrrole carboxamide units were conjugated with MC by
丝裂霉素C(MC)是用于临床抗癌化学疗法的天然细胞毒剂。它的抗肿瘤靶标似乎是DNA。经过生物还原活化后,MC烷基化并交联DNA。合成了MC衍生物,其中MC与DNA小沟结合剂相连,类似于netropsin和distamycin。将一个,两个和三个N-甲基吡咯羧酰胺单元通过(CH2)5-束缚带与MC偶联到MC的7-氨基上(分别为11、12和13)。与MC 11、12和13相反,它们对DNA具有非共价亲和力。它们通过NADPH-细胞色素c还原酶的生物还原活化与MC一样快。表征了还原性和低pH活化引起的代谢产物,发现其与MC相似。DNA交联活性较弱,并随着与丝裂霉素分子连接的N-甲基吡咯羧酰胺单元数量的增加而降低。小牛胸腺DNA未形成可检测量的加合物。使用NCI体外抗肿瘤筛选确定11-13的体外抗肿瘤活性。结合物11-13具有生长抑制作用;但是,它们的活动比MC低1.5-2个数量级。COMPARE