在辅助剂中配制的BCG疫苗的增强疗效取决于IL-17A的表达
Steven C Derrick1, Amy Yang1, Siobhan Cowley1
1Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD, USA.
Tuberculosis (Edinburgh, Scotland)
|July 13, 2024
概括
一种新的结核病 (TB) 疫苗辅助剂,DDA/TDB,通过增强IL-17A免疫反应来增强BCG疫苗的疗效. 在小鼠中这种改善的免疫控制表明了一种有希望的新策略来对抗结核病感染.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 传染性疾病 传染性疾病
背景情况:
- 结核病 (TB) 仍然是一个全球性卫生挑战,需要改进的疫苗.
- 目前的BCG疫苗对结核病的有效性有所变化.
- 一种结合BCG与DDA/TDB辅助剂的新型疫苗配方在小鼠中显示出增强的保护作用.
研究的目的:
- 阐明BCG + DDA/TDB辅助疫苗增强疗效背后的免疫机制.
- 在接种疫苗的小鼠中,研究肺部特定免疫标记物和细胞因子在M.结核病挑战后的作用.
主要方法:
- 小鼠接种了单独BCG或BCG+DDA/TDB辅助疫苗.
- 小鼠被挑战了空气溶液中的Mycobacterium结核病菌.
- 在挑战后分析了肺免疫细胞群 (表达IL-17A的CD4+T细胞) 和细胞因子水平 (IL-17A,IL-12p40,IL-33).
- 用IL-17A缺乏的小鼠来评估IL-17A在保护中的作用.
主要成果:
- 与对照群相比,BCG + DDA / TDB接种疫苗的小鼠在挑战后一个月显示出肺部IL-17A表达的CD4 + T细胞数量显著增加.
- 在IL-17A缺乏的小鼠中,BCG + DDA / TDB所赋予的增强保护丧失了.
- 在BCG + DDA / TDB接种疫苗的小鼠的肺部中观察到显著增加的IL-17A,IL-12p40和IL-33水平.挑战后.
结论:
- DDA/TDB辅助剂显著增强了BCG诱导的IL-17A表达.
- 增加IL-17A水平对于通过BCG + DDA / TDB疫苗观察到的Mycobacterium结核病感染的改善控制至关重要.
- 这项研究强调了DDA/TDB辅助剂在开发更有效的结核病疫苗方面的潜力.
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