oncology. Starting from HTS hit 5, IDO-1 inhibitor 6 (EOS200271/PF-06840003) has been developed. The structure–activity relationship around 6 is described and rationalized using the X-ray crystal structure of 6 bound to human IDO-1, which shows that 6, differently from most of the IDO-1 inhibitors described so far, does not bind to the heme iron atom and has a novel binding mode. Clinical candidate 6 shows
肿瘤使用色
氨酸分解酶,例如
吲哚胺2,3-二加氧酶(
IDO-1)来诱导免疫抑制环境。
IDO-1响应炎症刺激而被诱导,并通过效应T细胞无反应性和增强的Treg功能促进免疫耐受。因此,
IDO-1是诱导关键免疫抑制机制的纽带,并代表肿瘤学中重要的免疫治疗靶标。从H
TS 5开始,已开发出
IDO-1
抑制剂6(EOS200271 / PF-06840003)。周围的结构-活性关系6中描述和合理化使用的X射线晶体结构6结合人
IDO-1,这表明6与迄今为止描述的大多数
IDO-1
抑制剂不同,它不与血红素
铁原子结合,并具有新颖的结合方式。临床候选药物6在
IDO-1人全血检测中显示出良好的功效,并且还显示出非常有利的A
DME谱,从而导致有利的预期人药代动力学特性,包括16-19 h的预期半衰期。