GrpE and ComD contribute to the adherence, biofilm formation, and pathogenicity of Streptococcus suis

文献类型： 外文期刊

第一作者： Yu, Fei

作者： Yu, Fei;Dong, Chunliu;Zhang, Yuefeng;Xie, Chunmei;Liu, Yanyan;Zhang, Zhiyun;Chen, Xueying;Li, Yanhua;Che, Ruixiang;Li, Lu;Cai, Xuehui;Wang, Gang;Wang, Gang

作者机构：

关键词： Streptococcus suis; GrpE; ComD; Biofilm formation; Adhesion; Pathogenicity

期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.8； 五年影响因子：2.8 ）

ISSN： 0302-8933

年卷期： 2023 年 205 卷 4 期

页码：

收录情况： SCI

摘要： Streptococcus suis is a major bacterial pathogen of swine and an emerging zoonotic agent that has to date resulted in substantial economic losses to the swine industry worldwide, and can cause persistent infection by forming biofilms. GrpE and histidine protein kinase ComD are important proteins implicated in the pathogenicity of S. suis, although whether they play roles in adhesion and biofilm formation has yet to be sufficiently clarified. In this study, we constructed grpE and comD deletion strains of S. suis by homologous recombination, and examined their cell adhesion and biofilm formation capacities compared with those of the wild-type strain. The pathogenicity of the grpE and comD deletion strains was evaluated using a mouse infection model, which revealed that compared with the wild-type, these deletion strains induced milder symptoms and lower bacteremia, as well as comparatively minor organ (brain, spleen, liver, and lung) lesions, in the infected mice. Moreover, the deletion of grpE and comD significantly reduced the pro-inflammatory cytokine (IL-6, IL-1 beta, and TNF-alpha) induction capacity of S. suis. Collectively, the findings of this study indicate that the GrpE and ComD proteins of Streptococcus suis play key roles in the adherence to PK-15 cells and the formation of biofilms, thereby contributing to the virulence of this pathogen.

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