The cAMP receptor protein gene contributes to growth, stress resistance, and colonization of Actinobacillus pleuropneumoniae

文献类型： 外文期刊

第一作者： He, Qiyun

作者： He, Qiyun;Zheng, Yaxuan;Yan, Kang;Tang, Jia;Yang, Fengming;Tian, Yanhong;Yang, Lijun;Dou, Beibei;Chen, Yunpeng;Gu, Jun;Chen, Huanchun;Bei, Weicheng;He, Qiyun;Zheng, Yaxuan;Yan, Kang;Tang, Jia;Yang, Fengming;Tian, Yanhong;Yang, Lijun;Dou, Beibei;Chen, Yunpeng;Gu, Jun;Chen, Huanchun;Bei, Weicheng;Yuan, Fangyan

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关键词： Actinobacillus pleuropneumoniae; cAMP receptor protein; Growth; Stress resistance; Colonization

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0378-1135

年卷期： 2024 年 290 卷

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收录情况： SCI

摘要： Porcine infectious pleuropneumonia (PCP) is a severe disease of porcine caused by Actinobacillus pleuropneumoniae (APP). The spread of PCP remains a threat to the porcine farms and has been known to cause severe economic losses. The cAMP receptor protein (CRP) serves as a pivotal player in helping bacteria adapt to shifts in their environment, particularly when facing the challenges posed by bacterial infections. In this study, we investigated the role of CRP in APP. Our results revealed that crp mutant (Delta crp) strains were more sensitive to acidic and osmotic stress resistance and had lower biofilm formation ability than wild-type (WT) strains. Furthermore, the Delta crp strains showed deficiencies in anti-phagocytosis, adhesion, and invasion upon interaction with host cells. Mice infected with the Delta crp strains demonstrated reduced bacterial loads in their lungs compared to those infected with the WT strains. This study reveals the pivotal role of crp gene expression in regulating pleuropneumonia growth, stress resistance, iron utilization, biofilm formation, phagocytosis, adhesion, invasion and colonization. Our discoveries offer novel perspectives on understanding the development and progression of APP infections.

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