3-Aminopyrazole Inhibitors of CDK2/Cyclin A as Antitumor Agents. 2. Lead Optimization
作者:Paolo Pevarello、Maria Gabriella Brasca、Paolo Orsini、Gabriella Traquandi、Antonio Longo、Marcella Nesi、Fabrizio Orzi、Claudia Piutti、Pietro Sansonna、Mario Varasi、Alexander Cameron、Anna Vulpetti、Fulvia Roletto、Rachele Alzani、Marina Ciomei、Clara Albanese、Wilma Pastori、Aurelio Marsiglio、Enrico Pesenti、Francesco Fiorentini、Jim R. Bischoff、Ciro Mercurio
DOI:10.1021/jm0408870
日期:2005.4.1
Inhibitors of cyclin-dependent kinases (CDK) such as CDK2/cyclin A-E are currently undergoing clinical trials to verify their potential as new anticancer agents. In a previous article we described the lead discovery process of a 3-aminopyrazole class of CDK2/cyclin A-E inhibitors. The endpoint of this process was PNU-292137, a compound endowed with in vivo antitumor activity in a mouse tumor xenograft
细胞周期蛋白依赖性激酶(CDK)的抑制剂,例如CDK2 /细胞周期蛋白AE,目前正在进行临床试验,以验证其作为新型抗癌药的潜力。在上一篇文章中,我们描述了3-氨基吡唑类CDK2 / cyclin AE抑制剂的先导发现过程。该过程的终点是PNU-292137,一种在小鼠肿瘤异种移植模型中具有体内抗肿瘤活性的化合物。我们优化了这种先导化合物,以改善某些物理化学性质,特别是溶解度和血浆蛋白结合。这个主要的优化过程使我们发现了(2S)-N-(5-环丙基-1H-吡唑-3-基)-2- [4-(2-氧代-1-吡咯烷基)苯基]丙酰胺(PHA) -533533,13),具有平衡活性与药物样特征的化合物。化合物13抑制CDK2 /细胞周期蛋白A的K(i)为31 nM,用亚微摩尔范围的IC(50)抵消不同细胞系的肿瘤细胞增殖。溶解度比起始铅提高了10倍以上,而血浆蛋白结合率则从99%降低到74%。通过利用这种在