培养血造干细胞产生抗结核的先天免疫力
Eva Kaufmann1, Joaquin Sanz2, Jonathan L Dunn1
1Meakins-Christie Laboratories, Department of Medicine, Department of Microbiology and Immunology, Department of Pathology, McGill International TB Centre, McGill University Health Centre, Montreal, QC H4A 3J1, Canada.
Cell
|January 13, 2018
概括
先天性免疫记忆,以前认为是不可能的,是由培养血造干细胞 (HSCs) 的Bacillus Calmette-Guérin (BCG) 生成的. 这种重编程增强了巨细胞对结核病的保护.
科学领域:
- 免疫学
- 血液形成
- 传染性疾病
背景情况:
- 适应性免疫传统上被认为是免疫记忆的唯一持有者.
- 新出现的证据表明,天生的免疫细胞可以"训练"以表现出类似记忆的特性.
- 遗传性免疫记忆的机制和体内位置在很大程度上是未知的.
研究的目的:
- 在体内研究先天免疫记忆形成的机制和位置.
- 确定Bacillus Calmette-Guérin (BCG) 是否可以诱导长期的先天免疫记忆.
- 探索向造血干细胞 (HSC) 在疫苗开发中的潜力.
主要方法:
- 给小鼠注射BCG,并对骨髓 (BM) 造血干细胞 (HSC) 和多能原生细胞 (MPP) 进行分析.
- 使用转录造型来评估HSC和原生细胞的变化.
- 采用了副生物和仿生小鼠模型,以及采用转移,以追踪细胞谱系和功能.
主要成果:
- 进入骨髓的BCG改变了HSC和MPP的转录格局,促进了骨髓形成而不是淋巴形成.
- 用BCG培养的HSC产生了经过表观基因改造的巨细胞,从而增强了对毒性Mycobacterium tuberculosis的保护.
- 在体内,BCG诱导的HSC重编程可持续训练单细胞/巨细胞系.
结论:
- 血造干细胞 (HSC) 通过BCG重新编程建立了先天的免疫记忆.
- 这种由HSC介导的先天免疫记忆增强了对结核病的保护.
- 针对高血压组是疫苗开发的新策略.
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