Modelling of filamentous phage-induced antibiotic tolerance of P. aeruginosa.

Modelling of filamentous phage-induced antibiotic tolerance of P. aeruginosa.
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DOI:
10.1371/journal.pone.0261482
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
--
中科院分区:
综合性期刊3区
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--
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在非吸附分子浓度较高的环境中,丝状分子倾向于自发组装成具有粘性形态的液晶液滴。丝状Pf噬菌体,如铜绿假单胞菌产生的噬菌体,与抗生素耐受性增加有关。我们对这一系统进行了建模,并表明由丝状Pf病毒粒子组成的细胞状体可以通过作为吸附扩散屏障而导致抗生素耐受。连续介质模型,让人联想到多孔介质中反应扩散的描述,已经得到了数值求解,并发现与使用均质方法获得的分析结果很好地一致。我们发现,tactoids的形成显著增加了抗生素的扩散时间,这可能导致更强的抗生素耐药性。
Filamentous molecules tend to spontaneously assemble into liquid crystalline droplets with a tactoid morphology in environments with high concentration on non-adsorbing molecules. Tactoids of filamentous Pf bacteriophage, such as those produced by Pseudomonas aeruginosa, have been linked to increased antibiotic tolerance. We modelled this system and show that tactoids composed of filamentous Pf virions can lead to antibiotic tolerance by acting as an adsorptive diffusion barrier. The continuum model, reminiscent of descriptions of reactive diffusion in porous media, has been solved numerically and good agreement was found with the analytical results, obtained using a homogenisation approach. We find that the formation of tactoids significantly increases antibiotic diffusion times which may lead to stronger antibiotic resistance.
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