Susceptibility and transcriptomic response to plasma-activated water of Listeria monocytogenes planktonic and sessile cells.

Susceptibility and transcriptomic response to plasma-activated water of Listeria monocytogenes planktonic and sessile cells.
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单增李斯特氏菌浮游细胞和无蒂细胞对血浆活化水的敏感性和转录组反应。

DOI:
10.1016/j.fm.2023.104252
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发表时间:
2023
期刊:
影响因子:
5.3
通讯作者:
Fernández-Gómez P
Fernández-Gómez P
中科院分区:
农林科学1区
文献类型:
--
作者:
Fernández-Gómez P

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以自来水为原料,在不同放电功率(26和36 W)、活化时间(5和30 min)下,采用表面介质阻挡放电制备等离子体活化水(PAW)。研究了三株单核增生李斯特菌在浮游和生物膜状态下的失活情况。在36 W-30 min产生的PAW显示出最低的pH值和最高的过氧化氢、硝酸盐、亚硝酸盐含量和对浮游状态细胞的有效性,处理15 min后可减少4.6 log。尽管在不锈钢和聚苯乙烯上形成的生物膜的抗菌活性较低,但将暴露时间增加到30分钟可以使失活>4.5 log循环。利用模拟其理化特性的化学溶液和RNA-seq分析研究了PAW的作用机制。主要的转录组变化影响碳代谢、毒力和一般应激反应基因,其中几个过度表达的基因属于钴胺依赖基因簇。
Plasma-Activated Water (PAW) was generated from tap water using a surface dielectric barrier discharge at different discharge power (26 and 36 W) and activation time (5 and 30 min). The inactivation of a three-strainListeria monocytogenescocktail in planktonic and biofilm state was evaluated. PAW generated at 36 W-30 min showed the lowest pH and the highest hydrogen peroxide, nitrates, nitrites contents and effectiveness against cells on planktonic state, resulting in 4.6 log reductions after a 15-min treatment. Although the antimicrobial activity in biofilms formed on stainless steel and on polystyrene was lower, increasing the exposure time to 30 min allowed an inactivation >4.5 log cycles. The mechanisms of action of PAW were investigated using chemical solutions that mimic its physico-chemical characteristics and also RNA-seq analysis. The main transcriptomic changes affected carbon metabolism, virulence and general stress response genes, with several overexpressed genes belonging to the cobalamin-dependent gene cluster.
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