使用最佳UTR和LNP的单价SARS-COV-2mRNA疫苗具有高度免疫性,对Omicron变种具有广泛的保护性
Zhongfeng Ye1, Srinivasa Reddy Bonam2, Lindsay G A McKay3
1Department of Biomedical Engineering, Tufts University, Medford, MA 02155.
概括
使用原始SARS-CoV-2尖端序列的新型mRNA疫苗提供了针对当前变种的广泛保护. 这些疫苗激活了强大的T细胞和抗体反应,证明了未来疫情准备的潜力.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 关注变种 (VOCs) 对当前的COVID-19疫苗表现出耐药性.
- 广泛保护性疫苗的开发对于未来的流行病准备至关重要.
研究的目的:
- 开发和评估具有广泛保护能力的新型信使RNA (mRNA) -脂质纳米粒子 (LNP) 疫苗.
- 在临床前模型中评估这些疫苗对SARS-CoV-2变种的疗效.
主要方法:
- 开发两种mRNA-LNP疫苗 (TU88mCSA和ALCmCSA),使用祖先的SARS-CoV-2尖端序列和优化的未翻译区域 (UTR).
- 在仓鼠模型中评估疫苗诱导的CD4+,CD8+T细胞反应,幽默免疫以及对WA1/2020,Omicron BA.1和BQ.1感染的保护.
- 在小鼠中进行抗原特异性免疫分析,以确定交叉保护的相关物质.
主要成果:
- TU88mCSA和ALCmCSA诱导了强大的CD4+和CD8+T细胞和幽默免疫反应.
- 这两种疫苗都对仓鼠的WA1/2020,Omicron BA.1和BQ.1感染提供了完整的保护.
- 疫苗在上呼吸道和下呼吸道增强了保护效果,与优异的UTR和LNP配方相关,促进肺组织内存T细胞.
结论:
- 开发的mRNA-LNP疫苗显示出针对SARS-CoV-2变种的广泛保护作用,包括Omicron BQ.1.
- 这个平台利用了祖先的尖峰序列,显示了快速适应和部署新兴VOC的潜力.
- 这些发现支持使用这种mRNA-LNP组合作为未来传染病威胁的广泛保护性疫苗平台.
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