细菌多样性主导着坦桑尼亚结核病患者的可变巨细胞反应
Hellen Hiza1,2,3, Michaela Zwyer1,2, Jerry Hella1,2,3
1Swiss Tropical and Public Health Institute, Allschwil, Basel, Switzerland.
Scientific reports
|April 23, 2024
概括
结核菌复合体 (MTBC) 遗传系影响巨细胞的反应,影响结核病的发生. 当地适应没有影响宿主易感性,突出MTBC.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 遗传学 是一个遗传学.
背景情况:
- 结核菌菌复合体 (MTBC) 由九个适应人类的血统组成,地理分布不同.
- 针对人类种群的特定MTBC基因型的局部适应已被提出,以影响结核病 (TB) 病原体.
研究的目的:
- 调查细菌遗传学或本地宿主-病原体的共同适应是否决定了MTBC的病原性.
- 为了确定不同的MTBC基因型是否对人类巨细胞感染易感性有不同的影响.
主要方法:
- 巨细胞是从坦桑尼亚结核病患者的单核细胞生成的.
- 这些巨细胞被感染了与患者原始感染菌株相比,具有相似或不同的基因谱系的MTBC菌株.
- 测量了细菌负担,细胞内复制率和细胞因子释放 (TNF-α,IL-6,IL-10,MIP-1β,IL-1β).
主要成果:
- MTBC血统L1感染导致细菌负担显著降低.
- 在MTBC血统L2菌株中,细胞内复制率显著提高.
- 感染L4菌株的巨细胞释放出显著更高水平的促炎性细胞因子和化学因子.
- 没有观察到局部MTBC适应对巨细胞敏感性的显著影响.
结论:
- 在结核病中,MTBC的遗传多样性,而不是局部适应,显著影响了宿主-病原体相互作用.
- 特定的MTBC系 (L1,L2,L4) 与人类巨细胞具有明显的相互作用,影响疾病的结果.
- 这些发现强调了MTBC遗传变异在理解结核病变异性方面的重要性.
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