The neglected intrinsic resistome of bacterial pathogens.

The neglected intrinsic resistome of bacterial pathogens.
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DOI:
10.1371/journal.pone.0001619
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发表时间:
2008-02-20
期刊:
影响因子:
3.7
通讯作者:
Martínez JL
Martínez JL
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fajardo A;Martínez-Martín N;Mercadillo M;Galán JC;Ghysels B;Matthijs S;Cornelis P;Wiehlmann L;Tümmler B;Baquero F;Martínez JL

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对抗生素具有内在耐药性的细菌是一个令人担忧的健康问题。人们普遍认为,细菌病原体的内在抗生素耐药性主要是细胞不渗透性和外排泵活性的结果。然而,本文提出的转座子标记的铜绿假单胞菌突变体的分析表明,这种表型是由来自所有功能类别的众多蛋白质的作用产生的。一些基因的突变使铜绿假单胞菌对抗生素更敏感,从而成为新的靶标。其他基因的突变使铜绿假单胞菌更具耐药性,因此定义了突变驱动获得抗生素耐药性的新机制,开辟了一个基于耐药性在临床环境中出现之前预测的新研究领域。抗生素不仅是对抗细菌竞争者的武器,也是天然的信号分子。我们的结果表明,抗生素抗性基因不仅仅是保护盾,而且提供了抗生素抗性基因在临床和自然界中的作用的更全面的观点。
Bacteria with intrinsic resistance to antibiotics are a worrisome health problem. It is widely believed that intrinsic antibiotic resistance of bacterial pathogens is mainly the consequence of cellular impermeability and activity of efflux pumps. However, the analysis of transposon-tagged Pseudomonas aeruginosa mutants presented in this article shows that this phenotype emerges from the action of numerous proteins from all functional categories. Mutations in some genes make P. aeruginosa more susceptible to antibiotics and thereby represent new targets. Mutations in other genes make P. aeruginosa more resistant and therefore define novel mechanisms for mutation-driven acquisition of antibiotic resistance, opening a new research field based in the prediction of resistance before it emerges in clinical environments. Antibiotics are not just weapons against bacterial competitors, but also natural signalling molecules. Our results demonstrate that antibiotic resistance genes are not merely protective shields and offer a more comprehensive view of the role of antibiotic resistance genes in the clinic and in nature.
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发表时间: 1997-04-01
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