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A Visual Assay to Monitor T6SS-mediated Bacterial Competition
Published on: March 20, 2013
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在Edwardsiella ictaluri的第六类分泌系统的表征
Safak Kalindamar1, Hossam Abdelhamed2, Adef O Kordon2
1Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Ordu University, Ordu, Türkiye.
PloS one
|December 28, 2023
概括
爱德华西拉 (Edwardsiella ictaluri) 的第六类分泌系统 (T6SS) 对鱼类病原体毒性至关重要. 缺乏T6SS组件的突变体显示病毒性降低,并提供了对鱼肠道败血症 (ESC) 的保护.
科学领域:
- 微生物学 微生物学
- 鱼类免疫学 鱼类免疫学
- 细菌病原体的发生.
背景情况:
- 爱德华兹菌 (Edwardsiella ictaluri) 引起鱼肠道败血症 (ESC),这是水产养殖中的重要疾病.
- 在E. ictaluri中,VI型分泌系统 (T6SS) 是一个关键的毒性因素,但仍然不太了解.
- 了解T6SS的功能对于开发有效的鱼疾病控制策略至关重要.
研究的目的:
- 阐明T6SS在E. ictaluri病原发生中的作用.
- 在毒性,宿主细胞相互作用和抗压力方面对E. ictaluri T6SS突变的特征.
- 评估T6SS突变体作为ESC疫苗候选人的潜力.
主要方法:
- 使用重叠扩展PCR拼接构建13个E. ictaluri T6SS突变体.
- 在道鱼腹膜巨细胞中对突变的吸收和生存的评估.
- 对道鱼的附着性,入侵性,体外抗压性和毒性进行评估.
主要成果:
- 特定的T6SS突变 (EiΔevpA, EiΔevpH, EiΔevpM, EiΔevpN, EiΔevpO) 在巨细胞中减少了细胞内复制.
- 突变者EiΔevpM,EiΔevpN和EiΔevpO对宿主细胞的附着性降低,EiΔevpN和EiΔevpO也显示出侵入性降低.
- 几种T6SS突变 (EiΔevpD, EiΔevpE, EiΔevpG, EiΔevpJ, EiΔevpK) 的毒性被减弱,并提供了对鱼指的E. ictaluri感染的保护.
结论:
- 在E. ictaluri的细胞内生存,宿主细胞的附着和入侵,抗压力和整体毒性方面,T6SS起着重要作用.
- 减弱的T6SS突变体显示出作为保护鱼免受ESC的疫苗候选人的潜力,特别是在鱼中.
- 对T6SS功能进行进一步的研究可以改善鱼水产养殖的疾病管理策略.
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