From 6-Aminoquinolone Antibacterials to 6-Amino-7-thiopyranopyridinylquinolone Ethyl Esters as Inhibitors of <i>Staphylococcus aureus</i> Multidrug Efflux Pumps
作者:Marco Pieroni、Mirjana Dimovska、Jean Pierre Brincat、Stefano Sabatini、Emanuele Carosati、Serena Massari、Glenn W. Kaatz、Arnaldo Fravolini
DOI:10.1021/jm1003304
日期:2010.6.10
poor substrates for NorA was investigated further. Several quinolone ester intermediates, devoid of any intrinsic antibacterial activity, were tested for their abilities to inhibit the activities of NorA (MFS family) and MepA (MATE family) S. aureus MDR efflux pumps. Selected quinolone esters were capable of inhibiting both MDR pumps more efficiently than the reference compound reserpine. Moreover, they
硫代吡喃吡啶部分被合成为新的杂环碱基,插入选定的喹诺酮核的C-7位置,然后确定对金黄色葡萄球菌菌株的抗菌活性。选定的硫吡喃并吡啶基喹诺酮类药物显示出显着的抗菌活性,包括在gyrA和grlA中具有突变的菌株以及其他过表达NorA多药(MDR)外排泵的菌株。大多数衍生物似乎不是NorA底物。进一步研究了硫代吡喃并吡啶基取代基使这些喹诺酮类药物成为NorA不良底物的作用。测试了几种不含任何固有抗菌活性的喹诺酮酯中间体抑制NorA(MFS家族)和MepA(MATE家族)金黄色葡萄球菌MDR外排泵的活性。与参考化合物利血平相比,所选的喹诺酮酯能够更有效地抑制两种MDR泵。而且,它们还能够恢复甚至增强环丙沙星对某些基因修饰的抗金黄色葡萄球菌菌株的活性。