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QseC Inhibition as a Novel Antivirulence Strategy for the Prevention of Acute Hepatopancreatic Necrosis Disease (AHPND)-Causing Vibrio parahaemolyticus

文献类型： 外文期刊

作者： Yang, Qian 1 ; Zou, Peizhuo 1 ; Cao, Zhi 1 ; Wang, Qingyao 5 ; Fu, Songzhe 5 ; Xie, Guosi 1 ; Huang, Jie 1 ;

作者机构： 1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Maricultural Organism Dis Control, Qingdao, Peoples R China

3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao Key Lab Mariculture Epidemiol & Biosecur, Qingdao, Peoples R China

4.Univ Ghent, Ctr Microbial Ecol & Technol CMET, Ghent, Belgium

5.Dalian Ocean Univ, Coll Marine Sci & Environm, Dalian, Peoples R China

6.Minist Educ, Key Lab Environm Controlled Aquaculture KLECA, Dalian, Peoples R China

7.Network Aquaculture Ctr Asia Pacific, Bangkok, Thailand

关键词： acute hepatopancreatic necrosis disease; Vibrio parahaemolyticus; antivirulence therapy; QseC; LED209

期刊名称：FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY （ 影响因子：5.293； 五年影响因子：5.882 ）

ISSN： 2235-2988

年卷期： 2021 年 10 卷

页码：

收录情况： SCI

摘要： Acute hepatopancreatic necrosis disease (AHPND) caused by Vibrio parahaemolyticus resulted in great economic losses in global shrimp aquaculture. There is an urgent need for development of novel strategies to combat AHPND-causing V. parahaemolyticus (Vp (AHPND)), given that one of the greatest challenges currently is the widespread use of antibiotics and subsequent emergence of multidrug-resistant bacteria. Here, we proposed a broad-spectrum antivirulence approach targeting a conserved histidine kinase, QseC, which has been demonstrated to activate virulence expression in several Gram-negative pathogens. Our results showed that QseC mediated the catecholamine stimulated effects on growth and flagellar motility of Vp (AHPND). Transcriptome analysis revealed that QseC was involved in the global regulation of the virulence of Vp (AHPND) as the Delta qseC mutant exhibited a decreased expression of genes related to type IV pilin, flagellar motility, and biofilm formation, while an overexpression of type VI secretion system and cell wall biosynthesis. Subsequently, the bacterial catecholamine receptor antagonist LED209 not only neutralized the stimulatory effects of host catecholamines on the growth and motility of Vp (AHPND) in vitro, but also attenuated the virulence of Vp (AHPND) towards brine shrimp larvae and white shrimp in vivo. Additionally, LED209 presented no interference with pathogen growth, nor the toxicity to the experimental animals. These results suggest that QseC can be an attractive antivirulence therapy target, and LED209 is a promising candidate for development of broad-spectrum antivirulence agents. This is the first study that demonstrated the role of QseC in the global regulation of Vp (AHPND) infection and demonstrated the antivirulence potential of LED209, which provides insight into the use of an antivirulence approach for targeting not only Vp (AHPND), but also a much larger collection of pathogenic bacteria.

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