向MR1-MAIT细胞轴可以提高疫苗的有效性,并提供对病毒病原体的保护
Rasheduzzaman Rashu1, Marina Ninkov1, Christine M Wardell1
1Department of Microbiology and Immunology, Western University, London, Ontario, Canada.
PLoS pathogens
|June 29, 2023
概括
用5-OP-RU向粘膜相关的不变T细胞 (MAIT) 提高了病毒疫苗的疗效. 这种基于利博弗拉的辅助剂扩大MAIT细胞,促进抗病毒CD8+T细胞的反应和对呼吸道病毒的保护.
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:
- 粘膜关联不变T细胞 (MAIT) 是具有抗菌作用的与生俱来的类似淋巴细胞.
- MAIT细胞可以对病毒感染做出反应,但它们在抗病毒免疫中直接向的目标尚未被探索.
- 对于MR1配体增强针对病毒病原体的疫苗反应的潜力仍然不清楚.
研究的目的:
- 调查通过MR1配体向MAIT细胞是否可以提高抗病毒疫苗的疗效.
- 为了评估5-(2-oxopropylideneamino)-6-D-ribitylaminouracil (5-OP-RU) 对MAIT细胞反应和疫苗诱导的免疫力对病毒感染的影响.
- 探索MAIT细胞扩张和激活的机制,以应对病毒疫苗和5-OP-RU.
主要方法:
- 使用了多个小鼠模型和疫苗平台 (流感,毒病毒,SARS-CoV-2).
- 与病毒疫苗一起使用5-OP-RU,一种基于细菌 рибофлавин的MR1配体.
- 评估了MAIT细胞扩张,表型 (MAIT1),CD8+T细胞反应和抗病毒保护.
- 研究的机制包括MAIT细胞的增殖,迁移和信号通路 (TLR3,IFNAR1).
- 在人类细胞培养系统中验证的发现.
主要成果:
- 5-OP-RU与病毒疫苗协同作用,在各种组织中扩大MAIT细胞.
- MAIT细胞被重新编程为一种亲炎性MAIT1表型,增强病毒特异性的CD8+T细胞反应.
- 5-OP-RU增强了异种类型的抗流感保护,并没有诱导MAIT细胞衰活.
- MAIT细胞积累是由于增殖而产生的,取决于疫苗复制和TLR3/IFNAR1信号传递.
- 在年轻和老的雄性和雌性小鼠以及人类细胞中观察到辅助效应.
结论:
- 用5-OP-RU向MR1显著增强了疫苗引起的抗病毒免疫力,即使对缺乏必要的 рибофлавин生物合成机制的病毒也是如此.
- 5-OP-RU作为一种强效和多用途的疫苗辅助剂,扩大MAIT细胞并增强病毒特异性的CD8+ T细胞反应.
- 这一战略有望改善不同人群中针对呼吸道病毒的疫苗疗效.
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