期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 65, 期 20, 页码 13910-13934出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.2c0115113910J
关键词
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资金
- La Caixa Junior Leader Fellowship [RO1 AI146116, R21 AI130540]
- la Caixa Foundation [LCF/BQ/PI20/11760012]
- European Union [100010434]
- European Research Council [847648]
- Microbiologia Molecular, Estrutural e Celular (ITQB-NOVA) [ERC-2017-CoG-771709]
- [LISBOA-01-0145-FEDER-007660]
This article describes the discovery of a new compound, 5-amino-4-quinolone 111, which shows exceptional activity against multidrug-resistant Gram-positive bacteria with low minimum inhibitory concentrations. Preliminary studies suggest that this compound selectively disrupts bacterial membranes, does not induce resistance, and has a high therapeutic index.
Nosocomial infections caused by resistant Gram-positive organisms are on the rise, presumably due to a combination of factors including prolonged hospital exposure, increased use of invasive procedures, and pervasive antibiotic therapy. Although antibiotic stewardship and infection control measures are helpful, newer agents against multidrug-resistant (MDR) Gram-positive bacteria are urgently needed. Here, we describe our efforts that led to the identification of 5-amino-4-quinolone 111 with exceptionally potent Gram-positive activity with minimum inhibitory concentrations (MICs) <= 0.06 mu g/mL against numerous clinical isolates. Preliminary mechanism of action and resistance studies demonstrate that the 5-amino-4-quinolones are bacteriostatic, do not select for resistance, and selectively disrupt bacterial membranes. While the precise molecular mechanism has not been elucidated, the lead compound is nontoxic displaying a therapeutic index greater than 500, is devoid of hemolytic activity, and has attractive physicochemical properties (clog P = 3.8, molecular weight (MW) = 441) that warrant further investigation of this promising antibacterial scaffold for the treatment of Gram-positive infections.
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