A coagulase-negative and non-haemolytic strain of Staphylococcus aureus for investigating the roles of SrtA in a murine model of bloodstream infection

文献类型: 外文期刊

第一作者: Wang, Lin

作者: Wang, Lin;Deng, Xuming;Bi, Chongwei;Wang, Tiedong;Hu, Jinping;Liu, Bingrun;Zhong, Xiaobo;Wang, Dacheng;Xiang, Hua;Cai, Hongjun;Chen, Fuguang

作者机构:

关键词: Sortase A;Staphylococcus aureus;renal abscess;mouse model

期刊名称:PATHOGENS AND DISEASE ( 影响因子:3.166; 五年影响因子:3.081 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Sortase A (SrtA) is a cysteine transpeptidase and virulence factor from Staphylococcus aureus (S. aureus) that catalyses the attachment and display of surface proteins on the cell wall, thereby mediating bacterial adhesion to host tissues, host-cell entry and evasion of the immune response. As a result, SrtA has become an important target in the development of therapies for S. aureus infections. In this study, we used the new reference strain S. aureus Newman D2C to investigate the role of SrtA in a murine model of bloodstream infection, when the impact of coagulase and haemolysin is excluded. The results suggested that deletion of SrtA reduced the bacterial burden on the heart, liver and kidneys by blunting the host proinflammatory cytokine response at an early point in infection. Kidneys, but not heart or liver, formed abscesses on the sixth day following non-lethal infection, and this effect was diminished by SrtA mutation. These findings indicate that SrtA is a determining virulence factor in lethality and formation of renal abscesses in mice followed by S. aureus bloodstream infection. We have thus established a convenient in vitro and mouse model for developing SrtA-targeted therapeutic strategies.

分类号: R37

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