之前的尾切除减弱了BCG疫苗对Mycobacterium结核病感染的免疫保护功效
Huirong Huang1, Wei Xu1, Sidong Xiong2
1Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Suzhou Medical College of Soochow University, Soochow University, Suzhou 215123, China.
Immunobiology
|August 17, 2025
概括
尾在免疫反应中起着至关重要的作用,对抗 Mycobacterium tuberculosis (M. tb),并增强了Bacillus Calmette-Guérin (BCG) 疫苗的疗效. 它的去除会损害T细胞的反应,并恶化肺病理.
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:
- 尾部作为开始性细菌的储存库,也是免疫球蛋白A生产的重要部位.
- 尾的确切免疫功能,特别是抗感染免疫力,仍然不完全理解.
- 脏补丁 (CeP) 是人类尾的小鼠对应物.
研究的目的:
- 调查尾对免疫反应对Mycobacterium结核病 (M. tb) 感染的影响.
- 为了确定尾切除术对Bacillus Calmette-Guérin (BCG) 疫苗疗效的影响.
- 阐明尾调节抗感染免疫力的基本机制.
主要方法:
- BALB/c小鼠在4周大时接受了尾切除或假手术.
- 小鼠被内鼻感染了Mycobacterium结核病H37Ra.
- 免疫反应,包括肺病理,T细胞激活 (IFN-γ+ T细胞),T细胞增殖,细胞毒性和树突细胞成熟,在感染后和BCG接种后进行了评估.
主要成果:
- 尾切除术导致肺巨细胞数量减少,并在M. tb感染后加重肺病理.
- 用BCG接种疫苗的尾切除小鼠显示BCG特异性IgG减少,IFN-γ+ T细胞反应减少,T细胞增殖和细胞毒性受损.
- 尾切除术导致介质淋巴结常规树突细胞 (cDC) 的成熟减弱,与系统T细胞反应受损和对M. tb.的细胞毒性相关.
结论:
- 完好无损的尾对于维持肠道树突细胞成熟和促进对M. tb.的全身Th1免疫反应至关重要.
- 尾在增强BCG疫苗的免疫效率方面起到辅助作用.
- 早期的尾切除损害了对M. tb的全身免疫反应,并降低了BCG疫苗接种的保护作用.
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