期刊
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
卷 80, 期 -, 页码 92-100出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2014.04.037
关键词
Fluoroquinolone; Flavonoid; Hybrid; DNA gyrase; Efflux pump; Inhibitor
资金
- National Natural Science Foundation of China [21262013]
- Hunan Provincial Natural Science Foundation of China [11JJ3113]
Based on a rationally conceived pharmacophore model to build a multi-target bacterial topoisomerase inhibitor, twenty-one fluoroquinolone-flavonoid hybrids were synthesized. Some obtained hybrids show excellent antibacterial activity against drug-resistant microorganisms with narigenin ciprofloxacin being the most active, showing 8, 43, 23 and 88 times better activity than cipro-floxacin against Escherichia coli ATCC 35218, Bacillus subtilis ATCC 6633, Staphylococcus aureus ATCC 25923 and Candida albicans ATCC 90873, respectively. Drug accumulation and DNA supercoliing assays of two active analogues revealed potent inhibition of both the DNA gyrase and efflux pump, confirming the desired dual mode of action. Molecular docking study disclosed that the introduced flavonoid moiety not only provides several additional interactions but also does not disturb the binding mode of the floxacin moiety. Our data also demonstrated that development of antifungals is possible from fluoroquinolones modified at C-7 position. (C) 2014 Elsevier Masson SAS. All rights reserved.
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