Phage-Antibiotic Synergy (PAS): beta-lactam and quinolone antibiotics stimulate virulent phage growth.

Phage-Antibiotic Synergy (PAS): beta-lactam and quinolone antibiotics stimulate virulent phage growth.
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噬菌体 - 抗生素协同作用(PAS):β-内酰胺和喹诺酮抗生素刺激有毒的噬菌体生长。

DOI:
10.1371/journal.pone.0000799
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发表时间:
2007-08-29
期刊:
影响因子:
3.7
通讯作者:
Krisch, H. M.
Krisch, H. M.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Comeau, Andre M.;Tetart, Francoise;Trojet, Sabrina N.;Prere, Marie-Francoise;Krisch, H. M.

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虽然噬菌体的繁殖对生物圈有着重大的影响,但外界环境如何影响噬菌体的生产却知之甚少。在这里,我们报告说,亚致死浓度的某些抗生素可以大大刺激宿主细菌细胞的生产一些有毒的噬菌体。例如,低剂量的头孢噻肟(一种头孢菌素)使尿路致病性大肠杆菌菌株的噬菌体ΦMFP的产量增加了7倍以上。我们将这种现象命名为噬菌体-抗生素协同作用(PAS)。在不同的宿主-噬菌体系统中观察到了相关效应,包括T4样噬菌体、β-内酰胺和喹诺酮类抗生素以及丝裂霉素C。这些抗生素的一个共同特征是它们抑制细菌细胞分裂并触发SOS系统。因此,我们研究了PAS效应的背景下,细菌SOS和免疫反应。我们发现,PAS效应出现SOS独立的,主要是一个后果的细胞的pronescence,它是模仿细胞组成的细丝。完全不相关的基因组会表现出这种现象,这一事实表明,它赋予了基因组一个重要的和普遍的优势。
Although the multiplication of bacteriophages (phages) has a substantial impact on the biosphere, comparatively little is known about how the external environment affects phage production. Here we report that sub-lethal concentrations of certain antibiotics can substantially stimulate the host bacterial cell's production of some virulent phage. For example, a low dosage of cefotaxime, a cephalosporin, increased an uropathogenic Escherichia coli strain's production of the phage ΦMFP by more than 7-fold. We name this phenomenon Phage-Antibiotic Synergy (PAS). A related effect was observed in diverse host-phage systems, including the T4-like phages, with β-lactam and quinolone antibiotics, as well as mitomycin C. A common characteristic of these antibiotics is that they inhibit bacterial cell division and trigger the SOS system. We therefore examined the PAS effect within the context of the bacterial SOS and filamentation responses. We found that the PAS effect appears SOS-independent and is primarily a consequence of cellular filamentation; it is mimicked by cells that constitutively filament. The fact that completely unrelated phages manifest this phenomenon suggests that it confers an important and general advantage to the phages.
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