Design and synthesis of tripeptidyl furylketones as selective inhibitors against the β5 subunit of human 20S proteasome
作者:Qi Sun、Tongliang Zhou、Dandan Xi、Xiaona Li、Zirui Lü、Fengrong Xu、Chao Wang、Yan Niu、Ping Xu
DOI:10.1016/j.ejmech.2020.112160
日期:2020.4
A series of tripeptidic proteasome inhibitors with furylketone as C-terminus were designed and synthesized. Biochemical evaluations against β1, β2 and β5 subunits revealed that they acted selectively on β5 subunit with IC50s against chymotrypsin-like (CT-L) activity in micromolar range. LC-MS/MS analysis of the ligand-20S proteasome mixture showed that the most potent compound 11m (IC50 = 0.18 μM)
设计合成了一系列以呋喃酮为C末端的三肽蛋白酶体抑制剂。针对β1,β2和β5亚基的生化评估表明,它们选择性地作用于β5亚基,IC 50抑制微摩尔范围内的胰凝乳蛋白酶样(CT-L)活性。配体20S蛋白酶体混合物的LC-MS / MS分析表明,最有效的化合物11m(IC 50 = 0.18μM)对20S蛋白酶体未进行共价修饰。但是,在洗脱分析中发现它以缓慢可逆的方式起作用,并且可逆性远低于MG132,这表明这些三肽呋喃酮与20S蛋白酶体形成可逆共价键的可能性。选择了几种化合物用于针对多种癌细胞系的抗增殖测定,并且化合物11m在所有测试的细胞系中显示出与阳性对照(MG132)相当的效能。此外,大鼠的药代动力学(PK)数据表明11m的行为与临床使用的卡非佐米类似(C max,2007μg/ L; AUC 0-t,680μg / L·h; V ss,0.66 L / kg)。所有这些数据表明11m是一