The small non-coding RNA rli106 contributes to the environmental adaptation and pathogenicity of Listeria monocytogenes

文献类型： 外文期刊

第一作者： Guo, Yun

作者： Guo, Yun;Ji, Chunhui;Wang, Lixia;Ning, Chengcheng;Li, Na;Li, Zhiyuan;Shang, Yunxia;Li, Yaling;Sun, Yaoqiang;Huang, Xiaoxing;Li, Jie;Meng, Qingling;Qiao, Jun;Cai, Xuepeng

作者机构：

关键词： Listeria monocytogenes; rli106 sRNA; environmental adaptation; pathogenicity; DegU target gene

期刊名称：JOURNAL OF VETERINARY RESEARCH （ 影响因子：1.8； 五年影响因子：2.2 ）

ISSN： 2450-7393

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Introduction: Listeria monocytogenes (LM) is an important food-borne pathogen, and the risk of its ingestion is a serious public health issue. The better its environmental adaptation mechanisms and pathogenicity are understood, the better the risk it poses can be countered. The regulatory role of the small non-coding RNA (sRNA) rli106 in the environmental adaptation and pathogenicity of LM is still unclear and this study investigated that role through its biological function. Material and Methods: An LM-delta rli106 gene deletion strain and an LM-delta rli106/rli106 gene complementation strain were constructed using the homologous recombination technique. Then, the adaptation of these strains to temperature, alkalinity, acidity, salinity, ethanol and oxidative stressors, their biofilm-forming ability and their pathogenicity in mice were investigated to show the regulatory roles of sRNA rli106 in LM. The target gene of rli106 was also predicted, and the interaction between it and rli106 was verified by a two-plasmid co-expressing system based on E.coli and Western blot analysis. Results: The adaptation of LM-delta rli106 to environmental stressors of pH 9, 5% NaCl and 8% NaCl, 3.8% ethanol and 5 mM H2O2 was significantly reduced when compared to the parental (LM EGD-e) and complementation strains. Also, the biofilm formation, cell adhesion, invasion, intracellular proliferation and pathogenicity of LM-delta rli106 in mice were significantly reduced. The results of two-plasmid co-expression and Western blot showed that rli106 can interact with the mRNA of the predicted DegUtarget gene. Conclusion: The sRNA rli106 may positively regulate the expression of the DegU gene in LM. This study sheds light on its regulatory roles in environmental adaptation and pathogenicity, providing new insights into the molecular mechanism of sRNA mediation in LM.

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