(dUTPase) has been identified as a promising approach to enhance the efficacy of 5-fluorouracil (5-FU)-based chemotherapy. This study describes the development of a novel class of dUTPase inhibitors based on the structure–activity relationship (SAR) studies of uracil derivatives. Starting from the weak inhibitor 7 (IC50 = 100 μM), we developed compound 26, which is the most potent human dUTPase inhibitor
人脱氧
尿苷三磷酸酶(dUTPase)的抑制已被确认为提高基于5-
氟尿
嘧啶(5-FU)的化疗效果的一种有前途的方法。这项研究基于尿
嘧啶衍
生物的结构-活性关系(
SAR)研究,描述了一类新型的dUTPase
抑制剂的开发。从弱
抑制剂7(IC 50 = 100μM)开始,我们开发了化合物26,它是迄今为止报道的最有效的人dUTPase
抑制剂(IC 50 = 0.021μM)。化合物26不仅在体外显着增强了5-
氟-
2'-脱氧尿苷(FdUrd)对HeLa S3细胞的生长抑制活性(
EC 50= 0.075μM),但在连续输注5-FU的情况下,对小鼠MX-1乳腺癌异种移植模型也显示出强大的抗肿瘤活性。这是人类dUTPase
抑制剂增强
TS抑制剂抗肿瘤活性的第一个体内证据。基于这些发现,可以得出结论,化合物26是用于临床开发的有希望的候选物。