2344825-52-9

XL-223 is a potent BET inhibitor effective in endocrine-resistant ER+ breast cancer with acquired resistance to fulvestrant and palbociclib. XL-223 was more potent in MCF-7:CFR cells than six BET inhibitors in clinical trials. Transcriptomic analysis differentiated XL-223 from the benchmark BETi, JQ-1, showing downregulation of oncogenes and upregulation of tumor suppressors and apoptosis. The therapeutic approach was validated by oral administration of XL-223 in orthotopic xenografts of endocrine-resistant breast cancer in monotherapy and in combination with fulvestrant. Importantly, at an equivalent dose in rats, thrombocytopenia was mitigated.

XP-524 是一种有效的 BET 和 EP300 抑制剂。XP-524 在体内显示出强大的杀肿瘤活性。 XP-524 可防止 KRAS 诱导的体内肿瘤转化，并延长两种侵袭性 PDAC 转基因小鼠模型的存活时间。XP-524 还增强了自身肽的表达和将肿瘤细胞向细胞毒性 T 淋巴细胞的募集。XP-524 具有研究胰腺导管腺癌（PDAC）的潜力。