抗生素治疗适度降低了对的抗 Mycobacterium 结核病再感染的保护
Sharie Keanne Ganchua1, Pauline Maiello1, Michael Chao2
1Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
Infection and immunity
|March 22, 2024
概括
结核病 (TB) 的同时免疫力依赖于活生生的结核菌 (Mtb) 感染,以防止再感染. 在最初的Mtb感染后,抗生素治疗会降低的这种保护作用.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 传染性疾病 传染性疾病
背景情况:
- 同时免疫力,即在持续感染期间防止再感染的保护,在结核病 (TB) 中观察到.
- 对于这种免疫力,活生生的 Mycobacterium tuberculosis (Mtb) 的必要性仍然不清楚.
- 之前在人类和动物模型上的研究表明,同时免疫力在结核病预防中起着作用.
研究的目的:
- 调查活MTB在控制二次MTB感染中的作用.
- 评估抗生素治疗对灵长类模型同时免疫力的影响.
主要方法:
- 用Cynomolgus作为结核病模型.
- 用分子条形码的mtb库用于感染跟踪.
- 定子发射断层扫描-计算机断层扫描 (PET-CT) 成像,流动细胞计和细胞因子分析评估了免疫反应和细菌负担.
- 在初级Mtb感染后进行了抗生素治疗,然后再进行二次感染.
主要成果:
- 抗生素治疗减少了肺炎,但没有显著改变细菌的建立,传播或重感染后的负担.
- 与未经治疗的子相比,用抗生素治疗的子对抗再感染的保护程度略有下降.
- 在七只未经治疗的子中,有四只获得了消毒免疫力,而在接受治疗的子中,没有一个获得了消毒免疫力.
结论:
- 活着的mtb似乎是强大的同时免疫力对结核病再感染的必要.
- 抗生素治疗损害了持续的Mtb感染的保护作用.
- 这些发现强调了活体病原体在维持结核病的保护性免疫力方面的重要性.
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