麻疹病毒载体以I型干扰素,IL-18和单细胞依赖的方式激活人类NK和MAIT细胞
Kombo F N'guessan1,2, Zhanna Shubin1,2, Kawthar Machmach1,2
1US Military HIV Research Program, Center for Infectious Disease Research, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA.
Journal of immunology research
|July 21, 2025
概括
像ALVAC这样的复合性毒杆病毒激活免疫细胞,包括自然杀伤细胞 (NK) 和粘膜相关的不变T细胞 (MAIT). 这种对疫苗疗效至关重要的免疫反应似乎在不同的毒病毒载体中保持不变.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
背景情况:
- 再组合性毒口病毒是有希望的疫苗载体,但它们的免疫相互作用机制需要进一步阐明.
- 来自泰国RV144试验的艾滋病毒疫苗中的毒病毒载体ALVAC显示出适度的疗效.
- 了解病毒载体免疫性对于开发有效疫苗至关重要.
研究的目的:
- 为了研究由ALVAC-HIV毒病毒载体触发的免疫细胞激活.
- 为了确定参与ALVAC-HIV介导免疫反应的特定免疫细胞和途径.
- 确定这种免疫激活机制是否保留在其他毒病毒载体中,如修饰疫苗安卡拉 (MVA).
主要方法:
- 在体外感染外周血液单核细胞 (PBMCs) 与ALVAC-HIV.
- 自然杀手 (NK) 和粘膜相关的不变T细胞 (MAIT) 激活的分析.
- 评估单细胞,cGAS感应,IL-18和I型IFN在免疫激活中的作用.
- 将ALVAC-HIV与针对免疫细胞激活的修饰疫苗安卡拉 (MVA) 进行比较.
主要成果:
- 在PBMC中,ALVAC-HIV感染激活了NK和MAIT细胞.
- 这种激活部分取决于单细胞,cGAS传感,以及IL-18和I型IFN的产生.
- 激活的NK和MAIT细胞随后有助于B细胞激活.
- 此外,MVA还显示NK和MAIT细胞具有类似的激活.
结论:
- 艾尔瓦克-艾滋病毒对NK和MAIT细胞进行激活,从而促进了涉及B细胞的更广泛的免疫反应.
- 观察到的免疫激活机制在ALVAC和MVA毒病毒载体之间似乎保持不变.
- NK和MAIT细胞可能在毒病毒疫苗载体的免疫性中发挥重要作用.
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