Understanding and predicting the potency of ROS-based enzyme inhibitors, exemplified by naphthoquinones and ubiquitin specific protease-2
作者:Pushparathinam Gopinath、Atif Mahammed、Shimrit Ohayon、Zeev Gross、Ashraf Brik
DOI:10.1039/c6sc02758j
日期:——
The same series of compounds was also examined in terms of their inhibitory effect on the enzymatic activity of USP2. One deduction from these investigations was that the ortho-quinone motif in β-lapachone is much better suited for the catalytic reduction of oxygen than the para-quinone motif and some approved quinone based drugs. A broader conclusion, obtained from the series of compounds with ortho-quinone
最近的研究表明,诱导活性氧(ROS)形成的小分子选择性靶向癌细胞中过表达的酶可能是一种可行的癌症治疗方法。一个这样的例子是泛素特异性蛋白酶2(USP2)(一种对抗前列腺癌的新兴药物靶标)的失活被β-lapachone灭活,已确定其涉及将催化性半胱氨酸的硫醇残基氧化为亚磺酸。合理设计具有改进活性的β-拉帕酮类似物需要对决定此类分子产生ROS的变量有更好的了解。这个关键方面已通过关于其将分子氧还原为ROS的能力,对其1,2-萘醌骨架的调节和建立结构/活性关系。还检查了相同系列的化合物对USP2酶活性的抑制作用。从这些研究中得出的一个推论是,β-lapachone中的邻-醌基序比对-醌基序和某些批准的基于醌的药物更适合于催化还原氧。更广泛的结论,从系列用化合物的获得邻-quinone基序,是只有其氧化还原电位是在窄范围-0.3±0.1的V(剂与pH 7.5的水性缓冲液中的Ag / AgCl诱导R