开发一种用Glycan掩盖的SARS-CoV-2 RBD疫苗,用于对抗与SARS相关的冠状病毒
Zuxin Liang1, Chunhui Li2, Xiaohua Gong3,4
1BSL-3 Laboratory (Guangdong), Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health; Department of Laboratory Medicine, Zhujiang Hospital; Southern Medical University, Guangzhou, People's Republic of China.
PLoS pathogens
|September 26, 2024
概括
这项研究设计了SARS-CoV-2的受体结合域 (RBD),以创建新的疫苗. 这些新型疫苗对多种冠状病毒变体具有广泛的中和活性,并增强细胞免疫力.
科学领域:
- 病毒学和免疫学 病毒学和免疫学
- 疫苗开发 疫苗开发
背景情况:
- 由冠状病毒引起的新兴和复发性传染病构成了全球重大公共卫生威胁.
- 现有的疫苗主要针对SARS-CoV-2的受体结合域 (RBD),但对各种变种和相关冠状病毒的疗效可能有限.
研究的目的:
- 开发一种有针对性的疫苗策略,以产生能够中和SARS-CoV-2变种和其他SARS相关冠状病毒的抗体.
- 设计RBD以暴露保存的,更难获得的表位,以获得更广泛的免疫反应.
主要方法:
- 通过引入氨基酸突变,对SARS-CoV-2的RBD进行了基因糖化修改.
- 开发的信使RNA (mRNA) 和复合子单元疫苗使用工程RBD (M1,M2) 和野生型RBD作为免疫原.
- 评估了对各种SARS-CoV-2变体,SARS-CoV和WIV1-CoV的中和抗体反应,并在小鼠模型中评估了保护.
主要成果:
- 工程-RBD疫苗引起了针对多个SARS-CoV-2变种,SARS-CoV和WIV1-CoV的强有力的中和反应.
- 疫苗在受到XBB.1.16菌株挑战的小鼠中提供了保护,证明了对流行变种的有效性.
- 甘氨酸掩盖被确定为影响抗体结合和保存抗体反应的关键因素;mRNA疫苗刺激了更强的细胞介导免疫力.
结论:
- 对RBD的甘氨酸修饰是一种可行的策略,可以增强对与SARS相关的冠状病毒的广泛中和效果.
- 工程RBD疫苗显著改善中和活性和细胞免疫力,为下一代冠状病毒疫苗提供了一个有希望的方法.
- 这一战略为开发针对各种冠状病毒有效的疫苗提供了宝贵的见解.
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