Novel Coumarin Derivatives Inhibit the Quorum Sensing System and Iron Homeostasis as Antibacterial Synergists against <i>Pseudomonas aeruginosa</i>
作者:Jun Liu、Si-Yu Zhao、Jia-Yi Hu、Qiu-Xian Chen、Shu-Meng Jiao、Hai-Chuan Xiao、Qiang Zhang、Jun Xu、Jian-Fu Zhao、Hai-Bo Zhou、Jun-Xia Zheng、Ping-Hua Sun
DOI:10.1021/acs.jmedchem.3c01268
日期:2023.11.9
Pseudomonas aeruginosa (P. aeruginosa) is well-known to cause biofilm-associated drug resistance and infections that often lead to treatment failure. Herein, we reported a dual-acting antibiofilm strategy by inhibiting both the bacterial quorum sensing system and the iron uptake system. A series of coumarin derivatives were synthesized and evaluated, and compound 4t was identified as the most effective
众所周知,铜绿假单胞菌(P. aeruginosa )会引起生物膜相关的耐药性和感染,从而常常导致治疗失败。在此,我们报道了一种通过抑制细菌群体感应系统和铁吸收系统的双重作用抗生物膜策略。合成并评估了一系列香豆素衍生物,化合物4t被确定为最有效的生物膜抑制剂(IC 50 = 3.6 μM)。进一步的机理研究证实,4t不仅抑制QS系统,而且还与作为铁螯合剂的pyoverdine竞争,导致铜绿假单胞菌缺铁。此外,与单剂量抗生素治疗相比, 4t显着提高了环丙沙星和妥布霉素的协同抗菌作用200-1000倍以上。因此,我们的研究表明,4t是一种潜在的新型抗菌增效剂候选物,用于治疗细菌感染。