针对SARS-CoV-2和具有有效免疫的变体的三价mRNA疫苗
Ji Wang1, Yanhao Zhang1, Chao Liu1
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 14122, PR China.
Molecular pharmaceutics
|September 12, 2023
概括
一种新的三价mRNA疫苗结合了祖先,三角体和Omicron变体,显示出对SARS-CoV-2的广泛保护的承诺. 这种新型的疫苗配方引发了强烈的免疫反应,并可能为当前和未来的变种提供有效的免疫.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
- 纳米技术纳米技术
背景情况:
- 针对SARS-CoV-2的单向mRNA疫苗是有效的,但受到变异性免疫逃避的挑战.
- 新出现的SARS-CoV-2变种表现出显著的免疫逃避特性.
- 需要针对SARS-CoV-2及其变种的广泛保护性疫苗.
研究的目的:
- 开发和表征一种新的三价值mRNA疫苗,针对祖先,三角形和Omicron SARS-CoV-2变种.
- 评估三价mRNA疫苗纳米配方的物理化学性质,稳定性和体外性能.
- 在小鼠模型中评估三价mRNA疫苗的免疫性,有效性和安全性.
主要方法:
- 使用微流体技术将三种不同的受体结合域 (RBD) mRNA联合封装成脂质纳米粒子 (LNP).
- 使用动态光散射 (DLS) 进行物理化学表征和稳定性评估.
- 在体外评估转染效率,溶酶体逃逸和通过西部斑块的蛋白质表达;在BALB/c小鼠中进行ex vivo成像.
主要成果:
- 与商用试剂相比,三价mRNA疫苗在体外显示出优异的生物相容性,转染效率和溶酶体逃逸.
- 同封装的RBDmRNAs被成功地转化为可检测的蛋白质在转染细胞和老鼠肝脏中的活体.
- 用三价值疫苗进行主要增强免疫,诱导了强大的幽默和T细胞反应,与所有三种变体的高IgG抗体标位,并没有观察到毒性.
结论:
- 开发的三价mRNA疫苗纳米配方是稳定的,并表现出增强的细胞传递特性.
- 两剂三价mRNA疫苗可以引起针对SARS-CoV-2及其变种的广泛和强有力的免疫反应.
- 这种三价mRNA疫苗策略有可能提供针对不断演变的SARS-CoV-2菌株的有效免疫.
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