Gallium(<scp>iii</scp>) and iron(<scp>iii</scp>) complexes of quinolone antimicrobials
作者:Katja Dralle Mjos、Jacqueline F. Cawthray、Elena Polishchuk、Michael J. Abrams、Chris Orvig
DOI:10.1039/c6dt01315e
日期:——
levofloxacin, lomefloxacin, nalidixic acid, norfloxacin, oxolinic acid, and pipemidic acid. The antimicrobial efficacy of the tris(quinolono)gallium(III) complexes was studied against E. faecalis and S. aureus (both Gram-positive), as well as E. coli, K. pneumonia, and P. aeruginosa (all Gram-negative) in direct comparison to the tris(quinolono)iron(III) complexes and the corresponding free quinolone
铁是许多微生物必不可少的营养素。根据“特洛伊木马假说”,生物系统很难区分Fe 3+和Ga 3+,这构成了镓(III)离子的抗菌功效。已经合成并充分表征了九种新颖的三(喹诺酮)镓(III)配合物及其相应的铁(III)类似物。本研究使用了三代药物的喹诺酮类抗菌剂:环丙沙星,依诺沙星,氟罗沙星,左氧氟沙星,洛美沙星,萘啶酸,诺氟沙星,恶唑酸和哌啶酸。研究了tris(quinolono)gallium(III)配合物的抗微生物功效粪肠球菌和金黄色葡萄球菌(均为革兰氏阳性),以及大肠杆菌,肺炎克雷伯菌和铜绿假单胞菌(均为革兰氏阴性),可直接与三(喹诺酮)铁(III)配合物和各种浓度的相应的游离喹诺酮配体。对于三(喹诺酮)镓(III)配合物,未观察到Ga 3+和喹诺酮类抗菌剂的联合抗菌作用。