Citrobacter rodentium(ϕStx2dact), a murine infection model for enterohemorrhagic Escherichia coli.

Citrobacter rodentium(ϕStx2dact), a murine infection model for enterohemorrhagic Escherichia coli.
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DOI:
10.1016/j.mib.2021.11.013
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发表时间:
2022-03
影响因子:
5.4
通讯作者:
Leong, John M.
Leong, John M.
中科院分区:
生物学2区
文献类型:
--
作者:
Thorpe, Cheleste M.;Pulsifer, Amanda R.;Osburne, Marcia S.;Vanaja, Sivapriya Kailasan;Leong, John M.

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肠出血性大肠杆菌的特征是肠上皮细胞上附着和消失(A/E)病变的形成以及滋贺毒素的产生。大肠杆菌(EHEC)感染,可导致致命的溶血性尿毒综合征。尽管完全重现人类疾病的动物感染模型仍然难以捉摸,但口服感染啮齿柠檬酸杆菌(Citrobacter rodentium)(Citrobacter Stx 2dact)(一种用EHEC衍生的产滋贺毒素2噬菌体溶原化的天然鼠病原体)的小鼠发生肠A/E病变和毒素依赖性全身性疾病。该模型有助于研究:(A)噬菌体基因表达和原噬菌体诱导如何导致疾病,并可能由抗生素治疗引发;(B)毒力基因表达如何被微生物群和结肠代谢组学环境改变;以及(C)先天免疫信号传导如何受到Stx的影响。因此,该模型提供了一个独特的工具,访问EHEC发病机制的各个方面。
The formation of attaching and effacing (A/E) lesions on intestinal epithelium, combined with Shiga toxin production, are hallmarks of enterohemorrhagic E. coli (EHEC) infection that can lead to lethal hemolytic uremic syndrome. Although an animal infection model that fully recapitulates human disease remains elusive, mice orally infected with Citrobacter rodentium(ϕStx2dact), a natural murine pathogen lysogenized with an EHEC-derived Shiga toxin 2-producing bacteriophage develop intestinal A/E lesions and toxin-dependent systemic disease. This model has facilitated investigation of how: (A) phage gene expression and prophage induction contribute to disease and are potentially triggered by antibiotic treatment; (B) virulence gene expression is altered by microbiota and the colonic metabolomic milieu; and (C) innate immune signaling is affected by Stx. Thus, the model provides a unique tool for accessing diverse aspects of EHEC pathogenesis.
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