新生小鼠对COVID-19 mRNA疫苗的免疫反应
Leda Lotspeich-Cole1, Mukesh Kumar Jha1, Swetha Parvathaneni1
1US FDA/CBER/OVRR/DBPAP, 10903 New Hampshire Ave., Silver Spring, MD, USA.
Vaccine
|January 29, 2026
概括
与重组蛋白质疫苗相比,mRNA疫苗平台在新生小鼠中产生了更高的抗体水平和更好的SARS-CoV-2结合抑制. 这表明mRNA疫苗可能在年轻人群中提供优越的免疫性.
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:
- 在COVID-19大流行期间,mRNA疫苗首次获得了人类使用许可.
- 目前针对SARS-CoV-2的mRNA疫苗未经授权用于新生儿,因此需要对其安全性和有效性进行研究.
- 关于新生儿群体中SARS-CoV-2mRNA疫苗的免疫性数据有限.
研究的目的:
- 在新生小鼠中,比较mRNA编码受体结合域 (RBD) 疫苗与重组RBD蛋白疫苗的免疫性.
- 评估新生儿的抗体反应和功能能力,特别是由这两种疫苗平台诱导的RBD与ACE2结合的抑制.
主要方法:
- 新生小鼠被免疫两次,分隔三周,用一种mRNA编码的RBD疫苗 (RBD-mRNA-LNP) 或一种与AddaVaxTM辅助的重组RBD蛋白疫苗 (rRBD) 接种.
- 测量了抗体水平,特别是针对RBD的IgG.
- 诱导抗体的功能能力通过测量RBD与ACE2受体结合的抑制来评估.
主要成果:
- 这两种疫苗平台都在新生小鼠中诱导可检测的抗RBD抗体.
- 与rRBD疫苗相比,RBD-mRNA-LNP疫苗引起了明显更高水平的针对RBD的IgG抗体.
- 使用RBD-mRNA-LNP疫苗的免疫接种导致RBD与ACE2结合的更强烈的抑制.
结论:
- 与重组蛋白质平台相比,mRNA疫苗平台在新生小鼠中显示出优异的免疫性.
- 在新生儿模型中,mRNA疫苗引起更高的抗体标位和增强的功能活性,包括改善病毒结合的抑制.
- 这些发现表明mRNA疫苗技术有可能在非常年轻的个体中诱导强大的免疫反应,这需要进一步调查.
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