Indoleamine 2,3-dioxygenase 1 (IDO1) mediated kynurenine pathway of tryptophan degradation is identified as an appealing and novel target in immunotherapy for the treatment of cancer. In this study, a novel series of naphthoquinone derivatives were synthesized, characterized and evaluated for their inhibitory activities against IDO1, and their structure−activity relationship was investigated. Among them,
吲哚胺 2,3-双加氧酶 1 (
IDO1) 介导的色
氨酸降解犬尿
氨酸途径被确定为治疗癌症的免疫疗法中一个有吸引力的新靶点。在这项研究中,合成、表征和评估了一系列新的
萘醌衍
生物对
IDO1 的抑制活性,并研究了它们的构效关系。其中,化合物T16、T44、T47、T49、T53和T54显示出有效的
IDO1抑制活性,IC 50值介于18和61 nM之间,其效力比正在进行临床试验III评估的INCB024360更有效。此外,化合物T28、T44和T53使大鼠血浆中的犬尿
氨酸
水平降低 30%–50%。还评估了表现出优异
IDO1 抑制活性的化合物对色
氨酸 2,3-双加氧酶 (TDO) 的抑制活性。其中,化合物T28 (
IDO1 IC 50 = 120 nM) 显示出有希望的 TDO 抑制 (IC 50 72 nM),并被鉴定为
IDO1/TDO 双重
抑制剂。