Cyclic Secondary Sulfonamides: Unusually Good Inhibitors of Cancer-Related Carbonic Anhydrase Enzymes
作者:Janina Moeker、Thomas S. Peat、Laurent F. Bornaghi、Daniela Vullo、Claudiu T. Supuran、Sally-Ann Poulsen
DOI:10.1021/jm500255y
日期:2014.4.24
IX selective ligands is imperative for the development of these agents. Primary sulfonamides are broad specificity inhibitors of CA enzymes, while secondary sulfonamides are generally poor CA inhibitors. However, saccharin, a cyclic secondary sulfonamide, has unusually good inhibition of CA IX (Ki = 103 nM). In this study, we demonstrate that the affinity and selectivity of saccharin for CA IX can
碳酸酐酶IX(CA IX)是低氧癌症治疗的目标,而CA IX选择性配体的发现对于这些药物的开发至关重要。一级磺酰胺是CA酶的广泛特异性抑制剂,而二级磺酰胺通常是较差的CA抑制剂。但是,糖精(一种环状仲磺酰胺)对CA IX的抑制作用非常好(K i = 103 nM)。在这项研究中,我们证明了糖精对CA IX的亲和力和选择性在与疏水或亲水取代基连接时可以得到进一步调节。亲水性糖缀合物衍生物(12)对CA IX的抑制作用得到改善(K i = 49.5 nM),对主要脱靶CAs的抑制作用非常差(K i > 50 000 nM)与糖精相比。对于CA IX的脱靶CA选择性> 1000倍,对于经典的伯磺酰胺CA抑制剂来说是前所未有的。我们的研究强调了环状仲磺酰胺被用于发现有效的,对癌症有选择性的CA抑制剂的潜力。