Galleria mellonella as an infection model to investigate virulence of Vibrio parahaemolyticus.

Galleria mellonella as an infection model to investigate virulence of Vibrio parahaemolyticus.
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DOI:
10.1080/21505594.2017.1384895
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发表时间:
2018-01-01
期刊:
影响因子:
5.2
通讯作者:
Titball RW
Titball RW
中科院分区:
生物学2区
文献类型:
--
作者:
Wagley S;Borne R;Harrison J;Baker-Austin C;Ottaviani D;Leoni F;Vuddhakul V;Titball RW

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最近从胃肠炎患者中分离出了非致突变性副溶血性弧菌分离株(tdh−/trh−/T3 SS 2 −)。在这项研究中,我们报告说,幼虫的蜡螟(大蜡螟)是容易感染的致病性或非致病性临床分离株的副溶血性弧菌。相比之下,用副溶血性弧菌的环境分离株接种的幼虫没有死于疾病。临床非致病性分离株的全基因组测序显示存在编码一种nutrient水解酶的基因,鉴定为mutT。副溶血性弧菌mutT突变株不能杀死G.在接种后24 h,Mellonella,表明该基因在毒力中的作用。结果表明,G. Mellonella是研究副溶血性弧菌可能毒力基因筛选的一个有价值的模型,可为非典型非致突变性副溶血性弧菌的毒力机制提供新的见解。这些发现将有助于开发用于鉴定致病性副溶血性弧菌的改进的基因检测方法,并将对科学界产生重大影响。
Non-toxigenic V. parahaemolyticus isolates (tdh−/trh−/T3SS2−) have recently been isolated from patients with gastroenteritis. In this study we report that the larvae of the wax moth (Galleria mellonella) are susceptible to infection by toxigenic or non-toxigenic clinical isolates of V. parahaemolyticus. In comparison larvae inoculated with environmental isolates of V. parahaemolyticus did not succumb to disease. Whole genome sequencing of clinical non-toxigenic isolates revealed the presence of a gene encoding a nudix hydrolase, identified as mutT. A V. parahaemolyticus mutT mutant was unable to kill G. mellonella at 24 h post inoculation, indicating a role of this gene in virulence. Our findings show that G. mellonella is a valuable model for investigating screening of possible virulence genes of V. parahaemolyticus and can provide new insights into mechanisms of virulence of atypical non-toxigenic V. parahaemolyticus. These findings will allow improved genetic tests for the identification of pathogenic V. parahaemolyticus to be developed and will have a significant impact for the scientific community.
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