Unique Sulfur–Aromatic Interactions Contribute to the Binding of Potent Imidazothiazole Indoleamine 2,3-Dioxygenase Inhibitors
作者:Yi-Hui Peng、Fang-Yu Liao、Chen-Tso Tseng、Ramajayam Kuppusamy、An-Siou Li、Chi-Han Chen、Yu-Shiou Fan、Sing-Yi Wang、Mine-Hsine Wu、Ching-Cheng Hsueh、Jia-Yu Chang、Lung-Chun Lee、Chuan Shih、Kak-Shan Shia、Teng-Kuang Yeh、Ming-Shiu Hung、Ching-Chuan Kuo、Jen-Shin Song、Su-Ying Wu、Shau-Hua Ueng
DOI:10.1021/acs.jmedchem.9b01549
日期:2020.2.27
Indoleamine 2,3-dioxygenase (IDO1) inhibitors are speculated to be useful in cancer immunotherapy, but a phase III clinical trial of the most advanced IDO1 inhibitor, epacadostat, did not meet its primary end point and was abandoned. In previous work, we identified the novel IDO1 inhibitor N-(4-chlorophenyl)-2-((5-phenylthiazolo[2,3-c][1,2,4]triazol-3-yl)thio)acetamide 1 through high-throughput screening
吲哚胺 2,3-双加氧酶 (IDO1) 抑制剂被推测可用于癌症免疫治疗,但最先进的 IDO1 抑制剂 epacadostat 的 III 期临床试验未达到其主要终点并被放弃。在之前的工作中,我们确定了新型 IDO1 抑制剂 N-(4-氯苯基)-2-((5-苯基噻唑并[2,3-c][1,2,4]三唑-3-基)硫代)乙酰胺 1 到高通量筛选 (HTS)。在此,我们报告了该化合物的构效关系 (SAR) 研究,该研究产生了有效的 IDO1 抑制剂 1-(4-氰基苯基)-3-(3-(环丙基乙炔基)咪唑并[2,1-b]噻唑- 5-基)硫脲 47 (hIDO IC50 = 16.4 nM)。X 射线共晶结构分析表明,这种高效能的基础是由 47 的硫脲部分与 F163 和 F226 形成的独特的硫-芳烃相互作用网络。