小鼠对BCG疫苗接种的细胞和转录基因早期先天性免疫反应
Liya G Kondratyeva1,2, Olga A Rakitina1, Victor V Pleshkan1,2
1Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow 117997, Russia.
Cells
|January 8, 2025
概括
巴西尔·卡尔梅特-盖林 (BCG) 疫苗可以增强小鼠的先天免疫细胞,增加脏和骨髓中的单细胞和NK细胞. 这种早期反应显示了转录基因变化,可能会增强训练免疫力 (TRIM).
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 具有天生的免疫力.
背景情况:
- 巴西尔·卡尔梅特-盖林 (BCG) 疫苗引发了特定和非特定的 (训练免疫或TRIM) 免疫反应.
- 在BCG免疫接种后,骨髓和脏的早期先天性免疫反应尚不清楚.
研究的目的:
- 研究BCG疫苗接种后骨髓和脏内先天性免疫细胞 (单细胞,中性粒细胞,NK细胞) 的早期转录性反应.
- 为了确定BCG疫苗接种是否会改变这些先天性免疫细胞的比例和基因表达.
主要方法:
- 在C57Bl/6J小鼠中,BCG.被皮下免疫.
- 接种疫苗后三天,用FACS从脏和骨髓中分离出单细胞,中性粒细胞和NK细胞.
- 准备并对RNA-seq库进行了测序,以分析转录组变化.
主要成果:
- 接种BCG疫苗后3天,脏NK细胞和单细胞的比例增加.
- 转录组分析显示NK细胞,单细胞和未分类的骨髓细胞中的基因放松调节.
- 特定的免疫连接体 (Tnfsf14,S100a8) 和受体 (C5ar1,Csf2rb) 被确定为差异表达;中性粒细胞没有显示任何变化.
结论:
- 接种BCG疫苗会导致小鼠脏和骨髓中特定的先天性免疫细胞种群的早期增加.
- 单细胞和NK细胞的早期转录基因变化表明在BCG的先天免疫反应中发挥了作用.
- 这些发现支持了BCG疫苗接种通过早期天生的免疫调节来增强训练免疫力 (TRIM) 的假设.
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