Cinnamaldehyde Decreases the Pathogenesis of Aeromonas hydrophila by Inhibiting Quorum Sensing and Biofilm Formation
文献类型： 外文期刊
作者： Li, Shengping 1 ; Zhou, Shun 1 ; Yang, Qiuhong 1 ; Liu, Yongtao 1 ; Yang, Yibin 1 ; Xu, Ning 1 ; Ai, Xiaohui 1 ; Dong, Jing 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China
2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
关键词： Aeromonas hydrophila; quorum sensing; cinnamaldehyde; virulence; biofilm
期刊名称：FISHES （ 影响因子：2.3； 五年影响因子：2.4 ）
ISSN：
年卷期： 2023 年 8 卷 3 期
页码：
收录情况： SCI
摘要： Antibiotics were the main fishery drugs for treating Aeromonas hydrophila (A. hydrophila) infection, which would generate selective pressure and result in the appearance of antibiotic-resistant bacteria. The bacterial quorum sensing (QS) system provides a new alternative strategy against A. hydrophila infection. QS inhibitors can reduce bacterial virulence behaviors by disrupting QS, which has no effect on bacterial growth. Therefore, we studied the effect of cinnamaldehyde from a natural plant extract on the QS of A. hydrophila aiming to reduce its pathogenicity. The efficacy of cinnamaldehyde against A. hydrophila was evaluated from various aspects, including the effects on aerolysin, lipase, protease, swarming motility, biofilm formation, acyl-homoserine lactones (AHLs), and QS-related genes. Moreover, the therapeutic effect of cinnamaldehyde in vitro and in vivo was studied. The results showed that cinnamaldehyde could decrease the virulence phenotypes of A. hydrophila regulated by QS. Moreover, the transcriptions of related genes (aerA, ahyR, and ahyI) were downregulated following the addition of cinnamaldehyde. The in vitro and in vivo therapeutic assays show that cinnamaldehyde could reduce the aerolysin-mediated A549 cell injury and increase the survival rate of crucian carp infected with A. hydrophila. These results indicate that cinnamaldehyde would be a candidate QS inhibitor against A. hydrophila infection.
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