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用与变体匹配的腺病毒基疫苗进行增强,可以促进小鼠对SARS-CoV-2 Omicron亚系的抗体反应的中和
Kwang-Soo Shin1, Byung-Seok Kim2, Soojeong Chang3
1Cellid Co., Ltd., Seoul, Republic of Korea; Research Institute of Pharmaceutical Science, College of Pharmacy, Seoul National University, Seoul, Republic of Korea.
International journal of antimicrobial agents
|January 1, 2024
概括
针对Omicron亚型的更新的COVID-19疫苗显示出有希望. 增强剂注射改善了针对特定SARS-CoV-2菌株的中和抗体,这对于防止未来的波浪至关重要.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 在全球范围内,SARS-CoV-2 Omicron亚型 (例如,BA.4,BA.5,XBB.1.5) 的传播引发了COVID-19浪潮.
- 尖蛋白中的Omicron亚变体突变促进了对现有免疫的免疫逃避.
- 之前的疫苗AdCLD-CoV19-1针对祖先SARS-CoV-2菌株的受体结合域.
研究的目的:
- 开发和评估针对SARS-CoV-2 Omicron亚型的更新的腺病毒载体疫苗.
- 评估这些更新的疫苗在临床前模型中作为强剂疫苗的疗效.
- 确定最佳的疫苗接种策略,以覆盖各种Omicron亚变种突变.
主要方法:
- 构建更新的重组腺病毒载体疫苗,对Omicron亚变种尖端蛋白突变进行编码.
- 在用祖先菌株疫苗接种初级疫苗后,给予更新疫苗作为强剂注射.
- 针对各种SARS-CoV-2菌株伪病毒的中和抗体反应的临床前评估.
主要成果:
- 每个更新的疫苗增强剂都增强了对相应的Omicron亚变种伪病毒的中和抗体反应.
- 针对BA.1/BA.2的助推剂显示出对BA.2.75伪病毒的强烈中和.
- 针对BA.4.1/BA.5的增强剂对BQ.1,BQ.1.1和BF.7伪病毒最有效.
结论:
- 更新的腺病毒载体疫苗可以有效地提高针对特定Omicron亚型的中和抗体.
- 需要量身定制的增强剂策略,以应对由各种Omicron亚变体突变引起的免疫逃避.
- 制定全面的疫苗接种战略对于应对未来的COVID-19浪潮至关重要.
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