5-Substituted 3-isopropyl-7-[4-(2-pyridyl)benzyl]amino-1(2)H-pyrazolo[4,3-d]pyrimidines with anti-proliferative activity as potent and selective inhibitors of cyclin-dependent kinases
作者:Ladislava Vymětalová、Libor Havlíček、Antonín Šturc、Zuzana Skrášková、Radek Jorda、Tomáš Pospíšil、Miroslav Strnad、Vladimír Kryštof
DOI:10.1016/j.ejmech.2016.01.011
日期:2016.3
kinase (FAK), well-established substrates of CDKs, has been found in treated cells. Cleavage of PARP-1, down-regulation of Mcl-1 and activation of caspases correlated well with CDK inhibition and confirmed apoptosis as the primary type of cell death induced in cancer cells treated with the compounds in vitro. A comparison of known purine-based CDK inhibitor CR8 with its pyrazolo[4,3-d]pyrimidine bioisosteres
合成了一系列5-取代的3-异丙基-7- [4-(2-吡啶基)苄基]氨基-1(2)H-吡唑并[4,3- d ]嘧啶衍生物,并评估了它们的细胞周期蛋白依赖性激酶(CDK)抑制活性。最有效的化合物在5位上含有各种羟烷基胺,并具有低纳摩尔IC 50CDK2和CDK5的值。对50种蛋白激酶中活性最高的化合物之一的初步分析表明,它对CDK具有很高的选择性。这些化合物将细胞停在S和G2 / M期,并诱导了各种癌细胞系的凋亡。已经在处理过的细胞中发现了RNA聚合酶II和粘着斑激酶(FAK)的显着去磷酸化作用,这是CDKs公认的底物。PARP-1的切割,Mcl-1的下调和胱天蛋白酶的激活与CDK抑制密切相关,并证实凋亡是在体外用该化合物处理的癌细胞中诱导的主要细胞死亡类型。已知基于嘌呤的CDK抑制剂CR8与吡唑并[4,3- d]嘧啶生物等排体证实,新化合物在细胞分析中比嘌呤更有效。因此,吡唑并[4,3- d