在之前的SARS-CoV-2mRNA疫苗接种后的ipsilateral免疫接种与对侧免疫接种相比,引起了优异的B细胞反应
Wenxia Jiang1, Alexander R Maldeney1, Xue Yuan2
1Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
Cell reports
|January 9, 2024
概括
与初始剂量 (两侧) 相同侧面的mRNA疫苗增强会产生更强的免疫反应. 这种方法提高了抗体水平和交叉反应性,优化了疫苗对像Omicron这样的变种的有效性.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- 使者RNA (mRNA) 疫苗对于抗击COVID-19至关重要.
- 在初始剂量后3至4周内进行的强剂疫苗可以显著增加保护性抗体水平.
研究的目的:
- 调查增强疫苗接种地点 (ipsilateral vs. contralateral) 对SARS-CoV-2 mRNA疫苗免疫性的影响.
- 阐明免疫机制背后的差异性反应的ipsilateral与逆侧增强的免疫机制.
- 评估ipsilateral免疫的潜力,以提高疫苗对病毒变异的有效性.
主要方法:
- 在SARS-CoV-2 mRNA疫苗增强剂的ipsilateral和contralateral注射后免疫反应的比较.
- 对受体结合域 (RBD) 特定的生殖中心B细胞 (GCBCs) 和骨髓等离子细胞的量化.
- 对抗体亲和力,交叉反应性 (包括Omicron变异) 和T毛囊辅助细胞扩张的分析.
- 在ipsilateral和contralateral免疫接种后对异质抗原反应的评估.
主要成果:
- 与逆侧增强相比,ipsilateral增强诱导了更多的RBD特异性GCBC和骨髓血细胞.
- 双侧增强迅速产生高亲和度RBD特异性抗体,增强了对Omicron变异的交叉反应能力.
- 从机理上讲,双侧助推促进了先前存在的GCBCs的阳性选择和血细胞分化,由T毛囊辅助细胞扩张支持.
- 与反侧免疫接种相比,用与无关抗原的ipsilateral免疫接种放大了生殖中心和抗体反应.
结论:
- 对mRNA疫苗增强剂的ipsilateral管理优化免疫反应,导致增强的抗体产生和交叉反应性.
- 这些发现表明,可以战略性地操纵疫苗接种地点,以提高疫苗的有效性.
- 本研究提出了增强mRNA疫苗免疫性和保护能力的实际策略.
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