Design and synthesis of benzothiazole-6-sulfonamides acting as highly potent inhibitors of carbonic anhydrase isoforms I, II, IX and XII
摘要:
A series of novel 2-aminobenzothiazole derivatives bearing sulfonamide at position 6 was designed, synthesized and investigated as inhibitors of four isoforms of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1), the cytosolic CA I and II, and the tumor-associated isozymes CA IX and XII. Docking and binding energy studies were carried out to reveal details regarding the favorable interactions between the scaffolds of these new inhibitors and the active sites of the investigated CA isoforms. Most of the novel compounds were acting as highly potent inhibitors of the tumor-associated hCA IX and hCA XII with K(I)s in the nanomolar range. The ubiquitous and dominant rapid cytosolic isozyme hCA II was also inhibited with K(I)s ranging from 3.5 to 45.4 nM. The favorable interactions between some of the new compounds and the active site of different CA isoforms were delineated by using molecular docking which may be useful for designing compounds with high affinity and selectivity for some CAs with biomedical applications. (C) 2015 Elsevier Ltd. All rights reserved.
为了开发新的潜在抗肿瘤剂,已使用尾部方法开发了两个系列的苯和苯并噻唑磺酰胺衍生物,作为有效的人碳酸酐酶 (hCA, EC 4.2.1.1) 抑制剂。合成的化合物(XS-1至XS-22) 对 hCA 的生理相关异构体、细胞溶质 CA I 和 II、膜结合 CA IV 和肿瘤相关 CA IX 的抑制作用进行了测定。发现这两个系列的化合物对 CA I、II 和 IX 表现出低至中等纳摩尔范围的抑制作用,对 CA IV 表现出弱抑制作用。一些衍生物在纳摩尔范围内对肿瘤相关的 CA IX 异构体表现出选择性抑制。还筛选了这些有效化合物的选择性毒性,以评估它们对人牙龈成纤维细胞 (HGF) 和乳腺癌细胞系 (MCF7) 的体外抗增殖作用。最后,进行了分子对接研究,以解释那些有助于区分选定的人碳酸酐酶同种型的结构要求。