Design, synthesis, in vitro and in vivo evaluation, and structure-activity relationship (SAR) discussion of novel dipeptidyl boronic acid proteasome inhibitors as orally available anti-cancer agents for the treatment of multiple myeloma and mechanism studies
作者:Meng Lei、Huayun Feng、Enhe Bai、Hui Zhou、Jia Wang、Jingmiao Shi、Xueyuan Wang、Shihe Hu、Zhaogang Liu、Yongqiang Zhu
DOI:10.1016/j.bmc.2018.06.020
日期:2018.8
A series of novel dipeptidyl boronic acid inhibitors of 20S proteasome were designed and synthesized. Aliphatic groups at R1 position were designed for the first time to fully understand the SAR (structure–activity relationship). Among the screened compounds, novel inhibitor 5c inhibited the CT-L (chymotrypsin-like) activity with IC50 of 8.21 nM and the MM (multiple myeloma) cells RPMI8226, U266B and
设计并合成了一系列新型的20S蛋白酶体二肽基硼酸抑制剂。首次设计R 1位置的脂族基团以充分了解SAR(结构-活性关系)。在筛选的化合物中,新型抑制剂5c抑制CT-L(胰凝乳蛋白酶样)活性,IC 50为8.21 nM,而MM(多发性骨髓瘤)细胞RPMI8226,U266B和ARH77增殖,IC 50为8.99、6.75和9.10 nM。与化合物MLN2238(市售MLN9708的生物活性形式)相比,它们分别显示出相似的体外活性。为了研究口服药物的可用性,化合物5c用酶促IC 50为6.74 nM酯化其前药6a,RPMI8226,U266B和ARH77细胞增殖IC 50分别为2.59、4.32和3.68 nM。此外,前药6a表现出良好的药代动力学特性,口服生物利用度为24.9%,与MLN9708相似(27.8%)。此外,在人ARH77异种移植小鼠模型中,化合物6a显示出良好的微粒体稳定性,并比