Abstract

To explore the potential use of CDK inhibitors in pancreatic ductal adenocarcinoma (PDAC) therapy, a series of novel 2-((4-sulfamoylphenyl)amino)-pyrrolo[2,3-d]pyrimidine derivatives was designed, synthesised, and investigated for inhibition on both CDK kinase activity and cellular proliferation of pancreatic cancer. Most of new sulphonamide-containing derivatives demonstrated strong inhibitory activity on CDK9 and obvious anti-proliferative activity in cell culture. Moreover, two new compounds suppressed cell proliferation of multiple human pancreatic cancer cell lines. The most potent compound 2g inhibited cancer cell proliferation by blocking Rb phosphorylation and induced apoptosis via downregulation of CDK9 downstream proteins Mcl-1 and c-Myc in MIA PaCa-2 cells. CDK9 knockdown experiment suggests its anti-proliferative activity is mainly mediated by CDK9. Additionally, 2g displayed moderate tumour inhibition effect in AsPC-1 derived xenograft mice model. Altogether, this study provided a new start for further optimisation to develop potential CDK inhibitor candidates for PDAC treatment by alone or combination use.

 抽象的

为了探索 CDK 抑制剂在胰腺导管腺癌 (PDAC) 治疗中的潜在用途，设计、合成了一系列新型 2-((4-氨磺酰基苯基)氨基)-吡咯并[2,3-d]嘧啶衍生物，并对其进行了研究抑制 CDK 激酶活性和胰腺癌细胞增殖。大多数新型磺酰胺衍生物在细胞培养中表现出较强的CDK9抑制活性和明显的抗增殖活性。此外，两种新化合物抑制了多种人类胰腺癌细胞系的细胞增殖。最有效的化合物2g通过阻断 Rb 磷酸化来抑制癌细胞增殖，并通过下调 MIA PaCa-2 细胞中的 CDK9 下游蛋白 Mcl-1 和 c-Myc 来诱导细胞凋亡。 CDK9敲低实验表明其抗增殖活性主要由CDK9介导。此外， 2g在 AsPC-1 衍生的异种移植小鼠模型中显示出中等的肿瘤抑制作用。总而言之，这项研究为进一步优化开发潜在的 CDK 抑制剂候选物用于单独或联合使用 PDAC 治疗提供了一个新的起点。