凝血因子XII是一种抗菌蛋白,通过其重链对抗细菌感染
Junnan Liu1, Diyue Wang1, Sirui Pan1
1Center for Functional Genomics and Bioinformatics, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China.
International journal of molecular sciences
|July 12, 2025
概括
凝血因子XII (FXII) 具有抗菌性质,主要通过其重链 (hFXII),有效地对抗 Pseudomonas aeruginosa 感染. 这一发现重新定义了FXII.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
背景情况:
- 凝血因子XII (FXII) 启动了内在途径,但与血栓形成有关,而不是血液静止.
- 细菌感染激活凝血级联的机制尚未完全理解.
研究的目的:
- 研究FXII及其重链 (hFXII) 的抗菌活性.
- 探索FXII在细菌感染诱导的扩散性血管内凝血 (DIC) 中的作用.
主要方法:
- 构建和使用一个缺少FXII (FXII-/-) 的鼠标模型.
- 在体外和体内评估FXII和hFXII抗菌疗效对Pseudomonas aeruginosa.
- 在P. aeruginosa感染模型中评估FXII对DIC,器官损伤和生存率的影响.
主要成果:
- 在体外和体内,FXII和hFXII对P. aeruginosa表现出显著的抗菌活性.
- 在感染的小鼠中,FXII的使用减少了细菌负载,DIC,纤维素沉积和器官损伤.
- 用FXII和hFXII治疗改善了P. aeruginosa诱导的DIC模型中的生存率.
结论:
- FXII,特别是其重链,对像P. aeruginosa.这样的阴性细菌具有直接的抗菌活性.
- FXII的抗菌功能在天生的免疫力和缓解严重的感染相关的血栓性疾病中起着至关重要的作用.
- 这些发现为管理感染和相关的凝血病提供了新的治疗策略.
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