早期引入IL-10通过抑制CD4+Th1细胞反应来削弱BCG再接种疫苗的保护
Qing Lei1, Hui Fu1, Zongjie Yao1
1Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China.
Journal of translational medicine
|December 5, 2024
概括
在Bacillus Calmette-Guérin (BCG) 疫苗接种后阻断IL-10信号,可以提高T细胞的反应,并改善对小鼠结核病 (TB) 感染的保护. 这一发现对于开发更好的结核病疫苗至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 微生物学 微生物学
背景情况:
- 卡尔梅特-盖林菌 (BCG) 是唯一获得许可的结核病 (TB) 疫苗.
- 在青少年和成年人中,BCG对活跃结核病的疗效有限.
- 了解BCG主要增强的局限性对于成人结核病控制至关重要.
研究的目的:
- 调查BCG原始增强效率低于最佳的抗 Mycobacterium 结核病 (M.tb) 的机制.
- 分析IL-10在BCG诱导的免疫反应和保护中的作用.
主要方法:
- 在C57BL/6J小鼠中进行BCG疫苗接种 (主要提升).
- 在肺组织中分析细胞因子水平 (IL-10).
- 流细胞计和细胞内细胞因子染色 (ICS) 对于IL-10表达细胞.
- 对IL-10淘汰赛小鼠与野生类型小鼠的比较.
- 在接受BCG再接种的小鼠中对M.tb气溶挑战保护的评估,有或没有抗IL-10R治疗.
主要成果:
- 在BCG再接种疫苗后,IL-10在肺部显著上调,来源于巨细胞和树突细胞.
- 阻止IL-10信号传递 (使用IL-10-/-小鼠或抗IL-10R抗体) 增强了抗原特异性CD4+T细胞反应 (IFN-γ+,IL-2+).
- IL-10阻塞改善了中央和效应器记忆CD4+T细胞的反应,并提供了更好的保护M.tb气溶挑战.
结论:
- IL-10信号消极调节BCG诱导的对M.tb.的保护性免疫力.
- 这些发现对于优化BCG疫苗策略至关重要.
- 这项研究有助于开发有效的成人结核病疫苗.
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