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在单细胞衍生巨细胞中对SARS-CoV-2mRNA疫苗接种的持续表观遗传记忆
Alexander Simonis1,2,3, Sebastian J Theobald1,2,3, Anna E Koch2
1Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany.
mRNA疫苗通过表观遗传记忆来训练先天性免疫细胞,特别是基因组 H3 lysine 27 乙化 (H3K27ac). 这种训练增强了免疫反应,并通过增强剂注射来维持.
科学领域:
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 疫苗学 疫苗学 疫苗学
背景情况:
- 免疫记忆对于持久的抗微生物反应至关重要.
- mRNA疫苗培养先天性免疫细胞的确切机制尚未完全理解.
研究的目的:
- 在先天免疫细胞中研究mRNA疫苗诱导的表观遗传修饰.
- 了解这些修改如何促进宿主防御机制和免疫记忆.
主要方法:
- 在接种疫苗后的人类单细胞衍生巨细胞中对基因组H3 lysine 27乙化 (H3K27ac) 的分析.
- 对转录性变化和细胞因子分泌的评估.
- 研究H3K27ac与DNA二次结构之间的关联.
主要成果:
- 在SARS-CoV-2 mRNA疫苗接种中,在巨细胞促进体中确定了H3K27ac,这表明了表观遗传记忆.
- 对于持久的H3K27ac,需要进行两次疫苗接种,这与促炎反应有关.
- 增强疫苗恢复了H3K27ac水平,并与G-四重复的DNA结构相关.
结论:
- mRNA疫苗诱导先天免疫细胞的动态和持续的表观遗传训练.
- 这种训练促进了持续的亲炎性免疫反应.
- 巨细胞的表观遗传记忆与核酸结构和疫苗剂量有关.
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