删除FIS可以降低病毒毒性,并有效地保护小鼠的Pasteurella multocida感染
Zhijie Wang1, Siyu Liu1, Muhan Xie1
1College of Veterinary Medicine, Southwest University, Chongqing, 400715, China.
BMC veterinary research
|May 6, 2025
概括
逆转刺激因子 (Fis) 蛋白质通过调节囊合成和铁的吸收来促进帕斯图雷拉多种菌的毒性. 删除fis显著降低了病原性,并创造了一个潜在的疫苗候选人.
科学领域:
- 细菌学 细菌学是一门学科.
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 帕斯托雷拉多cida是一种重要的动物病原体.
- 逆转刺激因子 (Fis) 蛋白在P. multocida毒性中的作用尚未完全理解.
- 在P. multocida.中,fis积极调节囊基因转录.
研究的目的:
- 阐明 fis 调节 P. multocida 病变的精确机制.
- 为了研究鱼对细菌生长,囊生产和活体病毒毒性的影响.
- 为了评估一个被删除的菌株作为疫苗候选人的潜力.
主要方法:
- 通过同源重组生成了被删除的P. multocida菌株.
- 评估了细菌的生长,囊和生物膜的形成,以及对细胞的抵抗力.
- 在小鼠模型中确定病毒性,测量细菌负载,炎症反应和生存率.
- 研究了Fis在铁离子利用中的作用.
主要成果:
- 转录水平与囊和活体中的毒性正相关.
- Fis促进了P. multocida的生长,囊和生物膜的合成,以及对巨细胞细胞的抗性.
- Fis对于P. multocida利用结合的铁离子的能力至关重要.
- 细菌删除显著降低了病原性,组织细菌负载和炎症标志物.
- 裂变删除菌株赋予了对P. multocida血清型A和B的交叉保护.
结论:
- 在P. multocida中,Fis通过影响囊形成,铁的获取和免疫逃逸,发挥着关键的病原作用.
- 除减弱了P. multocida的毒性,并产生了一种对抗A和B血清型的减弱疫苗的有希望的候选人.
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