Structure–activity relationship and biological evaluation of 12 N-substituted aloperine derivatives as PD-L1 down-regulatory agents through proteasome pathway
作者:Qing–Xuan Zeng、Kun Wang、Xin Zhang、Yu-Long Shi、Yue–Ying Dou、Zhi–Hao Guo、Xin–Tong Zhang、Na Zhang、Hong–Bin Deng、Ying–Hong Li、Dan–Qing Song
DOI:10.1016/j.bioorg.2021.105432
日期:2021.12
aloperine derivatives were synthesized and screened for suppression on PD-L1 expression in H460 cells, as a continuation of our work. Systematic structural modifications led to the identification of compound 6b as the most active PD-L1 modulator. Compound 6b could significantly down-regulate both constitutive and inductive PD-L1 expression in NSCLC cells, and successively enhance the cytotoxicity of co-cultured
作为我们工作的继续,我们合成了29 个 12 N-取代的 aloperine 衍生物,并筛选了其对 H460 细胞中 PD-L1 表达的抑制作用。系统的结构修饰导致化合物6b被鉴定为最活跃的 PD-L1 调节剂。化合物6b在 20 μM 浓度下可显着下调 NSCLC 细胞中组成型和诱导型 PD-L1 的表达,并依次增强共培养 T 细胞对肿瘤细胞的细胞毒性。此外,它对 Lewis 肿瘤异种移植物表现出中等的体内抗癌功效,具有稳定的 PK 和安全性。机理研究表明,6b通过蛋白酶体途径而不是溶酶体途径介导PD-L1的降解。这些结果通过靶向PD-L1激活免疫细胞杀死癌细胞,为具有独特内环骨架的aloperine衍生物的癌症免疫治疗提供了强有力的信息。