RsbV of Listeria monocytogenes contributes to regulation of environmental stress and virulence

文献类型： 外文期刊

第一作者： Zhang, Zaichao

作者： Zhang, Zaichao;Meng, Qingling;Qiao, Jun;Yang, Lihong;Wang, Guanglei;Chen, Chuangfu;Meng, Qingling;Cai, Xuepeng;Zhang, Lijuan

作者机构：

关键词： Listeria monocytogenes;RsbV;Stress tolerance;Virulence

期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.552； 五年影响因子：2.475 ）

ISSN：

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收录情况： SCI

摘要： SigmaB factor is an important regulatory factor for stress response in Gram-positive bacteria such as Listeria monocytogenes (L. monocytogenes), Staphylococcus aureus and Bacillus subtilis. However, the activity of SigmaB factor is regulated by RsbV factor. Currently, the functional studies of RsbV factor are mostly focused on non-pathogenic B. subtilis, but the roles of RsbV factor in pathogenic L. monocytogenes during the regulation of environmental stress and virulence are still unclear. In the study, a a?? RsbV mutant of L. monocytogenes was constructed to explore the regulatory role of RsbV in environmental stress and virulence. The environmental stress experiments indicated that the growth and survival capability of a??RsbV mutant obviously decreased in stress of low temperature, osmotic pressure, alcohol and acid, compared with EGD strain. The macrophage infection experiment indicated that a??RsbV mutant had weaker survival capability than EGD strain, and the expression of PrfA, actA, PlcA and LLO was down-regulated in infected cells. Animal inoculation experiments indicated that RsbV deletion significantly reduced the pathogenicity of L. monocytogenes. Our data demonstrate that, in addition to regulating tolerance under environmental stress conditions, RsbV also contributes to regulation of L. monocytogenes virulence. ? 2012 Springer-Verlag Berlin Heidelberg.

分类号： Q93

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