(MDR) variants. Importantly, this compound was effective in all cases, with very promising MIC values (4 μM) in the case of some isoniazid/rifampicin-resistant Mtb strains. Finally, computer-based simulations revealed that the binding mode of 21a in the Mtb gyrase cleavage core complexed with DNA and the relevant network of intermolecular interactions are utterly similar to those described for ciprofloxacin
设计,合成并评估了许多新的F-三唑
喹诺酮(FTQ)和烷氧基三唑
喹诺酮(ATQ)对结核分枝杆菌H37Rv的活性。21种化合物中有5种表现出令人感兴趣的最低抑菌浓度(MIC)值(6.6-57.9μM),ATQ通常比FTQ更有效。两个ATQ 21a和30a被赋予了最佳的抗Mtb效力(分别为MIC = 6.9和6.6μM),并且在Vero
细胞系中没有细胞毒性。在DNA超螺旋活性测定中测试了抗结核分枝杆菌DNA促旋酶的活性,21a和30a显示IC 50值(27–28μM)与
环丙沙星(10.6μM)相当。接下来选择21a来筛选从临床分离物中获得的几种Mtb菌株,包括耐多药(MDR)变异体。重要的是,该化合物在所有情况下均有效,在某些耐异烟
肼/
利福平的Mtb菌株中,MIC值非常有希望(4μM)。最后,基于计算机的模拟显示,与DNA复合的Mtb促旋酶裂解核心中21a的结合模式和分子间相互作用的相关网络与环