Synthesis and antibacterial activity of catecholate–ciprofloxacin conjugates
摘要:
The development of an efficient route to obtain artificial siderophore antibiotic conjugates active against Gram-negative bacteria is crucial. Herein, a practical access to triscatecholate enterobactin analogues linked to the ciprofloxacin along with their antibacterial evaluation are described. Two series of conjugates were obtained with and without a piperazine linker which is known to improve the pharmacokinetics profile of a drug. A monocatecholate-ciprofloxacin conjugate was also synthesized and evaluated. The antibacterial activities against Pseudomonas aeruginosa for some conjugates are related to the iron concentration in the culture medium and seem to depend on the bacterial iron uptake systems. (C) 2014 Elsevier Ltd. All rights reserved.
Anionic fluoroquinolones as antibacterials against biofilm-producing Pseudomonas aeruginosa
摘要:
Pseudomonas aeruginosa is a common biofilm-forming bacterial pathogen implicated in diseases of the lungs. The extracellular polymeric substances (EPS) of respiratory Pseudomonas biofilms are largely comprised of anionic molecules such as rhamnolipids and alginate that promote a mucoid phenotype. In this Letter, we examine the ability of negatively-charged fluoroquinolones to transverse the EPS and inhibit the growth of mucoid P. aeruginosa. Anionic fluoroquinolones were further compared with standard antibiotics via a novel microdiffusion assay to evaluate drug penetration through pseudomonal alginate and respiratory mucus from a patient with cystic fibrosis. (C) 2016 Elsevier Ltd. All rights reserved.
Die Erfindung betrifft die Verwendung von Chinoloncarbonsäuren der Formel (I)
in der R1, R2, R3, R", R5, R6 und X die in der Beschreibung angegebene Bedeutung haben, als Bakterizide.
本发明涉及式(I)喹啉羧酸作为杀菌剂的用途。
其中 R1、R2、R3、R"、R5、R6 和 X 具有说明中给出的含义,可用作杀菌剂。