Casein kinase 1δ/ε have been identified as promising therapeutic target for oncology application, including breast and brain cancer. Here, we described our continued efforts in optimization of a lead series of purine scaffold inhibitors that led to identification of two new CK1δ/ε inhibitors 17 and 28 displaying low nanomolar values in antiproliferative assays against the human MDA-MB-231 triple negative breast cancer cell line and have physical, in vitro and in vivo pharmacokinetic properties suitable for use in proof of principle animal xenograft studies against human cancers.

中文翻译：

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开发双重酪蛋白激酶1δ/1ε（CK1δ/ε）抑制剂治疗乳腺癌

酪蛋白激酶1δ/ε已被确定为包括乳腺癌和脑癌在内的肿瘤学应用的有希望的治疗靶标。在这里，我们描述了我们在优化嘌呤支架抑制剂前导系列方面的持续努力，该系列试验导致鉴定出两种新的CK1δ/ε抑制剂17和28在针对人MDA-MB-231三阴性乳腺癌的抗增殖试验中显示出较低的纳摩尔值。细胞系具有物理，体外和体内药代动力学特性，适合用于证明针对人类癌症的动物异种移植的原理研究。