Allicin-inspired thiolated fluoroquinolones as antibacterials against ESKAPE pathogens
作者:Jordan G. Sheppard、Timothy E. Long
DOI:10.1016/j.bmcl.2016.10.002
日期:2016.11
Thiolated fluoroquinolones were synthesized from ciprofloxacin and evaluated for antimicrobial activity against a panel of pathogenic bacteria. Gram-positive species including methicillin-resistant Staphylococcus aureus (MRSA) exhibited the highest level of increased sensitivity toward ciprofloxacin bound with a N-propylthio substituent. Evidence was found that the antibiotics form disulfides with
由环丙沙星合成硫代氟喹诺酮类药物,并评估其对一组致病细菌的抗菌活性。包括耐甲氧西林的金黄色葡萄球菌(MRSA)在内的革兰氏阳性菌种对环丙沙星与N-丙硫基取代基结合的敏感性表现出最高水平。有证据表明,抗生素在细菌中形成具有低分子量硫醇的二硫键,并增强了胞浆中活性氧(ROS)的生成。归根结底,硫醇化氟喹诺酮类药物的抗MRSA活性增强归因于细胞通透性增加以及与胞质硫醇的反应,产生了无活性的二硫键代谢产物和母体环丙沙星作为DNA合成抑制剂。