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The VraSR two-component signal transduction system contributes to the damage of blood-brain barrier during Streptococcus suis meningitis

文献类型： 外文期刊

作者： Dou, Bei-Bei 1 ; Yang, Xia 1 ; Yang, Feng-Ming 1 ; Yan, Kang 1 ; Peng, Wei 1 ; Tang, Jia 1 ; Peng, Ming-Zheng 1 ; He, Qi-Yun 1 ; Chen, Huan-Chun 1 ; Yuan, Fang-Yan 4 ; Bei, Wei-Cheng 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Vet Med, State Key Lab Agr Microbiol, Wuhan 430070, Hubei, Peoples R China

2.Hubei Hongshan Lab, Wuhan 430070, Hubei, Peoples R China

3.Huazhong Agr Univ, Cooperat Innovat Ctr Sustainable Pig Prod, Wuhan 430070, Hubei, Peoples R China

4.Hubei Acad Agr Sci, Inst Anim Husb & Vet Sci, Hubei Key Lab Anim Embryo & Mol Breeding, Wuhan 430064, Peoples R China

5.Guangxi Yangxiang Co Ltd, Guigang 530015, Guangxi, Peoples R China

关键词： Streptococcus suis; VraSR; Meningitis; Blood-brain barrier; Tight junction proteins

期刊名称：MICROBIAL PATHOGENESIS （ 影响因子：3.8； 五年影响因子：4.0 ）

ISSN： 0882-4010

年卷期： 2022 年 172 卷

页码：

收录情况： SCI

摘要： Streptococcus suis (S. suis) is an important zoonotic pathogen that can cause high morbidity and mortality in both humans and swine. As the most important life-threatening infection of the central nervous system (CNS), meningitis is an important syndrome of S. suis infection. The vancomycin resistance associated sensor/regulator (VraSR) is a critical two-component signal transduction system that affects the ability of S. suis to resist the host innate immune system and promotes its ability to adhere to brain microvascular endothelial cells (BMECs). Prior work also found mice infected with AvraSR had no obvious neurological symptoms, unlike mice infected with wild-type SC19. Whether and how VraSR participates in the development of S. suis meningitis remains unknown. Here, we found AvraSR-infected mice did not show obvious meningitis, compared with wild-type SC19-infected mice. Moreover, the proinflammatory cytokines and chemokines in serum and brains of AvraSR-infected mice, including IL-6, TNF-alpha, MCP-1 and IFN-y, were significantly lower than wild-type infected group. Besides, blood -brain barrier (BBB) permeability also confirmed that the mutant had lower ability to disrupt BBB. Furthermore, in vivo and in vitro experiments showed that SC19 could increase BBB permeability by downregulating tight junction (TJ) proteins such as ZO-1, 8-Catenin, Occludin, and Clauidn-5, compared with mutant AvraSR. These findings provide new insight into the influence of S. suis VraSR on BBB disruption during the pathogenic process of streptococcal meningitis, thereby offering potential targets for future preventative and therapeutic strategies against this disease.

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