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Updated: Jan 11, 2026

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Published on: June 4, 2016

研究Listeria monocytogenes非编码RNA Rli47在对环境压力因素的反应中的作用

Bienvenido W Tibbs-Cortes^1,2,3, Jessica L Strathman-Runyan^2,3, Stephan Schmitz-Esser^2,3

¹Infectious Bacterial Diseases Unit, Agricultural Research Service, USDA, Ames, IA, 50011, United States.

|November 11, 2025

概括

李斯特菌对乳酸应激的生存受非编码RNA Rli47.7.的影响. 删除rli47增强了细菌的生存,这表明Rli47会影响细胞外对有机酸的抵抗力.

科学领域:

食品安全和微生物学
细菌应激反应机制是细菌应激反应的机制.
食品传播病原体的分子生物学

背景情况:

李斯特菌单细胞菌是一种重要的食源性病原体,引起严重疾病,特别是在免疫受损的个体.
它在食品生产环境 (FPE) 中对环境压力因素的抵御力使根除工作复杂化.
Rli47是一种非编码RNA,由乳酸上调调节,并且已知在特定营养条件下可以抑制Listeria的生长.

研究的目的:

研究非编码RNARli47在Listeria monocytogenes对乳酸应激反应中的作用.
为了确定rli47删除在有机酸暴露下对细菌生存和代谢活动的影响.

主要方法:

野生类型和rli47删除突变菌株Listeria monocytogenes的比较分析.
暴露于乳酸应激和评估细菌生存率.
流式细胞计量用于评估细菌细胞的代谢活性.
转录组分析和in silico目标预测以确定受影响的途径.

主要成果:

在rli47删除突变在对数增长阶段暴露乳酸后,其生存率明显高于野生类型菌株.
与野生类型相比,乳酸暴露对删除突变的代谢活性没有产生差异性影响.
转录基因数据表明,Rli47可能会影响与细胞外结构相关的途径,在没有它的情况下,可能会增强对有机酸应激的抵抗力.

结论:

Rli47在调节Listeria monocytogenes对乳酸压力的反应中发挥作用,可能通过影响细胞外完整性.
Rli47的功能可能会受到环境因素的影响,例如温度和营养素的可用性.
了解Rli47的作用可能为控制食品生产中的Listeria monocytogenes提供新的策略.

关键词:

李斯特里亚单细胞原生菌Listeria monocytogenes 在Rli47中使用.食品安全食品安全没有编码的RNA.压力反应应对压力的反应.转录组 (transcriptome) 是一个转录组.

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