通过AP205或TIP60纳米颗粒构成的SARS-CoV-2 RBD,并作为mRNA产生强大的中和抗体反应

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Protocol for Recombinant RBD-based SARS Vaccines: Protein Preparation, Animal Vaccination and Neutralization Detection

Protocol for Recombinant RBD-based SARS Vaccines: Protein Preparation, Animal Vaccination and Neutralization Detection

Published on: May 2, 2011

Johnathan D Guest¹, Yi Zhang¹, Daniel Flores¹

¹Vaccines and Immune Therapies, AstraZeneca, Gaithersburg, MD 20878, USA.

|August 28, 2025

概括

新的自组装纳米粒子AP205和TIP60有效地呈现了mRNA疫苗的SARS-CoV-2受体结合域 (RBD). 这些新型支架引起强大的免疫反应,与现有的RBD- 费里丁疫苗相比.

科学领域:

疫苗学
免疫学
生物技术

背景情况:

基于SARS-CoV-2受体结合域 (RBD) 的疫苗显示出有前途.
多重体RBD组件可以增强抗原呈现和免疫反应.
对于SARS-CoV-2疫苗的自组装支架与mRNA输送平台的结合尚未得到充分研究.

研究的目的:

设计和评估用于呈现SARS-CoV-2 RBD的新型自组装纳米粒子 (AP205,TIP60).
评估与这些新基架融合的编码RBD的mRNA疫苗的免疫性和中和功效.
将这些新型支架的有效性与已知的RBD-ferritin结构进行比较.

主要方法:

设计的RBD与AP205和TIP60自组装纳米粒子融合.
在传染后通过ELISA测试构造物的抗原性.
在小鼠中使用mRNA输送,并使用RBD-ferritin作为比较剂,评估免疫性和中和功效.

主要成果:

悬架式RBD结构被分泌出来并显示出抗原性.
在小鼠中,RBD-AP205和RBD-TIP60显示出强大的抗体结合和中和标位.
免疫反应与RBD-ferritin和全长尖峰蛋白疫苗相似.

结论:

AP205和TIP60纳米粒子有效地呈现RBD,诱导类似于费里的免疫反应.
这些新型架构为mRNA疫苗设计中的多重体显示提供了可行的替代方案.
这项研究为开发先进的疫苗平台提供了新的工具.

关键词:

冠状病毒抗体中和 mRNA 疫苗纳米粒子蛋白质支架

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