广谱Delta-BA.2串联融合的异构体mRNA疫苗由脂聚复合物输送
1CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China.
PLoS pathogens
|April 1, 2024
概括
一种新的mRNA疫苗,SWIM516,使用一种新型的输送系统来防止COVID-19变种. 这种广谱疫苗在动物模型中表现出强烈的免疫反应和保护,对抗Delta和Omicron菌株.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 目前正在进行的COVID-19大流行是由SARS-CoV-2进化驱动的,需要更新的疫苗.
- 新兴变种表现出显著的免疫逃脱,这对现有的疫苗有效性构成了挑战.
- 之前的疫苗设计为开发下一代免疫接种提供了基础.
研究的目的:
- 开发一种新型的,广泛的mRNA疫苗来对抗SARS-CoV-2变种.
- 评估新候选疫苗的免疫性和保护性疗效.
- 评估新型疫苗输送系统的安全性.
主要方法:
- 一种由脂聚复合体 (LPP) 输送的mRNA疫苗 (SWIM516) 的开发,该疫苗编码了一个模拟的Delta-BA.2受体结合域 (RBD) 模态.
- 在原始小鼠中评估幽默和细胞免疫反应,并作为针对SARS-CoV-2变体的强剂注射.
- 挑战研究在人类血管激素转化酶 (hACE2) 转基因小鼠和 rhesus macaques 使用活的 Delta 和 Omicron 病毒.
主要成果:
- 在SWIM516中,针对Delta和Omicron亚型变种,显示出广泛的免疫性.
- 接种疫苗的动物显示出显著的保护,在活病毒挑战时病毒载量减少和病理减弱.
- 这种LPP输送系统将mRNA表达局部化到注射部位,从而有可能减轻全身毒性.
结论:
- SWIM516 是一个有希望的下一代疫苗候选人,用于广泛的COVID-19保护.
- 该LPP输送系统为mRNA疫苗提供了一个潜在的更安全的替代品,而不是脂质纳米粒子.
- 基于其已证明的疗效和安全性,SWIM516的进一步开发是有必要的.
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