CDK12-IN-8(Compound Cpd143)是一种口服活性高且选择性强的细胞周期蛋白依赖性激酶 12(CDK12)抑制剂。通过抑制 CDK12 对 RNA 聚合酶 II C 端结构域(CTD)丝氨酸 2 的磷酸化,该化合物干扰基因转录的延伸以及 DNA 损伤修复途径。CDK12-IN-8 适用于研究CDK12高表达的癌症,例如小细胞肺癌和三阴性乳腺癌。
CDK12-IN-4, a pyrazolotriazine compound, exhibits potent inhibition of CDK12 by achieving an IC50 value of 0.641 μM, utilizing high ATP levels (2 mM). Notably, CDK12-IN-4 does not impact CDK2 Cyclin E (IC50 > 20 μM) or CDK9 Cyclin T1 (IC50 > 20 μM) under the influence of high ATP (2 mM) levels (WO2021116178A1).
CDK12-IN-6, a pyrazolotriazine compound, is a powerful inhibitor of CDK12. Its inhibitory activity is significant with an IC50 value of 1.19 μM when tested at high ATP concentration (2 mM). Notably, CDK12-IN-6 does not exhibit any inhibitory effect on CDK2 Cyclin E (IC50 >20 μM) and CDK9 Cyclin T1 (IC50 >20 μM) when tested under the same high ATP conditions (2 mM) (WO2021116178A1).