一种互惠模式的细菌通过VI型分泌系统对非共生宿主具有致命性
Keegan E Gaddy1, Alecia N Septer2, Karen Mruk3
1Department of Biochemistry and Molecular Biology, Brody School of Medicine, East Carolina University.
bioRxiv : the preprint server for biology
|December 23, 2024
概括
众所周知的共生体Vibrio fischeri可能会造成伤害. 这项研究表明,它会诱导水生生物的死亡率和疾病,突出显示其潜在的病原性超出了共生关系.
科学领域:
- 微生物学 微生物学
- 交生研究 交生研究
- 发现病原体发现
背景情况:
- 细菌通常被分为致病性或非致病性,但这种二元观点是一种过度简化.
- 维布里奥·菲舍里 (Vibrio fischeri) 是夏威夷尾鱼的独家互生共生生物,但它采用通常与致病性相关的分子和行为.
- 了解V. fischeri如何建立有益的共生,同时表现出潜在的有害特征至关重要.
研究的目的:
- 调查Vibrio fischeri对非共生宿主的致病潜力.
- 确定V. fischeri是否可以诱导水生生物的疾病表型和死亡率.
- 阐明VI型分泌系统1 (T6SS1) 在V. fischeri与真核细胞相互作用中的作用.
主要方法:
- 斑马鱼胚胎和Artemia nauplii暴露于V. fischeri. 的暴露.
- 观察暴露生物中的死亡率,生长延迟和疾病表型.
- 基因分析以评估VI型分泌系统1 (T6SS1) 在观察到的影响中的作用.
主要成果:
- 活鱼诱导了斑马鱼胚胎和Artemia nauplii的显著死亡率.
- 非致命的V. fischeri剂量导致斑马鱼的生长延迟和疾病指示性表型.
- 染色体I上保存的VI型分泌系统1 (T6SS1) 与V. fischeri诱导的死亡率有关.
结论:
- 鱼菌表现出致病能力,在同生环境之外对水生生物造成伤害.
- 鱼菌的VI型分泌系统1 (T6SS1) 在其与真核细胞的相互作用和对真核细胞的潜在伤害中发挥着作用.
- 这项研究挑战了对V. fischeri的传统观点,认为它只是一种有益的共生体,揭示了它对非共生宿主具有致病能力.
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