病原体衍生的糖骨架通过mTOR-HIF-1α-HK2-介导的训练免疫来增强对黄金葡萄球菌的先天免疫防御能力
Zheng Jia1, Lingdi Niu1, Junjie Guo1
1Heilongjiang Provincial Key Laboratory of Zoonosis, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150036, China.
Microbiological research
|April 2, 2025
概括
李斯特菌糖骨架 (pBLP) 通过诱导训练免疫力来增强金黄色葡萄球菌疫苗. 这种天生的免疫反应调节提高了疫苗的疗效,并提供了抗原独立的保护,防止黄金色杆菌感染.
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:
- 天生的免疫反应调节是增强黄金葡萄球菌疫苗的关键.
- 之前的发现表明,Listeria peptidoglycan骨架 (pBLP) 通过未知的机制增强免疫反应.
- 训练免疫力,一种先天免疫记忆的形式,是pBLP保护作用的潜在机制.
研究的目的:
- 调查pBLP是否通过诱导训练免疫来增强黄金色杆菌疫苗.
- 阐明了pBLP诱导的训练免疫的分子机制.
- 为了将pBLP诱导的训练免疫表型与β-葡萄糖的表型进行比较.
主要方法:
- 在体外测试中评估了对pBLP的反应中的细胞和细胞因子的产生.
- 在体内小鼠模型中评估pBLP对黄金色杆菌的保护作用,具有或没有疫苗的同时使用.
- 腹膜巨细胞的ex vivo分析以确定训练有素的免疫标记物.
- 转录组分析和抑制剂实验以确定关键的分子通路 (mTOR-HIF-1α,hexokinase 2).
主要成果:
- 在体外,pBLP增加了细胞和炎症性细胞因子水平,在二次刺激时TGF-β升高.
- 在体内,pBLP与疫苗保护小鼠对黄金色杆菌进行了试验,而pBLP单独提供了抗原独立的保护.
- 在腹巨中,pBLP增强了训练免疫标记物.
- 由pBLP诱导的训练免疫依赖于mTOR-HIF-1α和六酶2通路.
- 与β-葡萄糖相比,pBLP诱导了一个独特的训练免疫表型.
结论:
- 这项研究首次证明,pBLP可以诱导训练免疫力.
- 通过独特的训练免疫机制,pBLP增强了对黄金菌的疫苗保护.
- 研究结果为设计新型疫苗提供了洞察力,这些新型疫苗将特定和先天的免疫反应整合起来,以提高黄金色杆菌疫苗的疗效.
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