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Chemical Induction of Aminoglycoside Uptake Overcomes Antibiotic Tolerance and Resistance in Staphylococcus aureus.
Cell Chemical Biology ( IF 6.6 ) Pub Date : 2019-08-08 , DOI: 10.1016/j.chembiol.2019.07.009
Lauren C Radlinski 1 , Sarah E Rowe 1 , Robert Brzozowski 2 , Alec D Wilkinson 1 , Rennica Huang 1 , Prahathees Eswara 2 , Brian P Conlon 3
Affiliation  

Aminoglycoside antibiotics require proton motive force (PMF) for bacterial internalization. In non-respiring populations, PMF drops below the level required for drug influx, limiting the utility of aminoglycosides against strict and facultative anaerobes. We recently demonstrated that rhamnolipids (RLs), biosurfactant molecules produced by Pseudomonas aeruginosa, potentiate aminoglycoside activity against Staphylococcus aureus. Here, we demonstrate that RLs induce PMF-independent aminoglycoside uptake to restore sensitivity to otherwise tolerant persister, biofilm, small colony variant, and anaerobic populations of S. aureus. Furthermore, we show that this approach represses the rise of resistance, restores sensitivity to highly resistant clinical isolates, and is effective against other Gram-positive pathogens. Finally, while other membrane-acting agents can synergize with aminoglycosides, induction of PMF-independent uptake is uncommon, and distinct to RLs among several compounds tested. In all, small-molecule induction of PMF-independent aminoglycoside uptake circumvents phenotypic tolerance, overcomes genotypic resistance, and expands the utility of aminoglycosides against intrinsically recalcitrant bacterial populations.

中文翻译:

化学诱导的氨基糖苷摄取克服了金黄色葡萄球菌的抗生素耐受性和耐药性。

氨基糖苷类抗生素需要质子动力(PMF)才能使细菌内化。在非呼吸人群中,PMF降至药物流入所需的水平以下,限制了氨基糖苷类药物对严格和兼性厌氧菌的利用。我们最近证明,鼠李糖脂(RLs)是由铜绿假单胞菌产生的生物表面活性剂分子,可增强针对金黄色葡萄球菌的氨基糖苷类活性。在这里,我们证明RLs诱导不依赖PMF的氨基糖苷摄取,以恢复对金黄色葡萄球菌耐受性强的持久性,生物膜,小菌落变体和厌氧菌群的敏感性。此外,我们表明这种方法可以抑制耐药性的上升,恢复对高耐药性临床分离株的敏感性,并且可以有效对抗其他革兰氏阳性病原体。最后,尽管其他膜作用剂可以与氨基糖苷类协同作用,但不依赖于PMF的吸收诱导并不常见,并且在几种测试的化合物中与RL截然不同。总之,小分子诱导不依赖PMF的氨基糖苷摄取可​​以规避表型耐受性,克服基因型耐药性,并扩大了氨基糖苷类抗内在顽固细菌种群的效用。
更新日期:2019-11-09
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