Discovery, Optimization, and Structure–Activity Relationship Study of Novel and Potent RSK4 Inhibitors as Promising Agents for the Treatment of Esophageal Squamous Cell Carcinoma
作者:Yuan Yuan、Junpeng Xu、Lei Jiang、Kangjie Yu、Yuanyuan Ge、Mingyang Li、Huan He、Qiqi Niu、Xiayu Shi、Linni Fan、Zhuo Chen、Zhenjiang Zhao、Shiliang Li、Yufang Xu、Zhe Wang、Honglin Li
DOI:10.1021/acs.jmedchem.1c00969
日期:2021.9.23
Ribosomal S6 protein kinase 4 (RSK4) was identified to be a promising target for the treatment of esophageal squamous cell carcinoma (ESCC) in our previous research, whose current treatments are primarily chemotherapy and radiotherapy due to the lack of targeted therapy. However, few potent and specific RSK4 inhibitors are reported. In this study, a series of 1,4-dihydro-2H-pyrimido[4,5-d][1,3]oxazin-2-ones
核糖体S6蛋白激酶4(RSK4)在我们前期的研究中被认为是治疗食管鳞状细胞癌(ESCC)的一个有前景的靶点,由于缺乏靶向治疗,目前食管鳞状细胞癌的治疗主要是化疗和放疗。然而,关于有效且特异性的 RSK4 抑制剂的报道很少。在本研究中,设计并合成了一系列 1,4-二氢-2H-嘧啶并[4,5- d ][1,3]恶嗪-2-酮衍生物作为新型有效的 RSK4 抑制剂。化合物14f经鉴定在体外和体内均具有有效的 RSK4 抑制活性。 14f在体外显着抑制ESCC细胞的增殖和侵袭,IC 50值分别为0.57和0.98 μM。它剂量依赖性地抑制 RSK4 下游底物的磷酸化,同时对 ESCC 细胞中 RSK1-3 的底物影响很小。在 ESCC 异种移植小鼠模型中,肿瘤生长明显受到抑制,并且没有观察到对主要器官的毒性,这表明14f是一种有前途的用于 ESCC 治疗的 RSK4 靶向药物。