用气溶液中的Ad5-nCoV进行增强,在非活化COVID-19疫苗接种者中引起了强大的免疫反应
Frontiers in immunology
|October 23, 2023
概括
气溶性腺病毒载体疫苗 (Ad5-nCoV) 提供了对Omicron变种最强大和最持久的免疫反应. 这种新的传递方法为COVID-19助推策略提供了一个有希望的替代方案.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
背景情况:
- SARS-CoV-2 Omicron 变种显示出显著的免疫逃脱,需要改进的 COVID-19 疫苗增强剂策略.
- 目前的疫苗对Omicron的有效性有所降低,这凸显了对替代方法的需求.
研究的目的:
- 为了评估不同类型的COVID-19疫苗接种后的免疫反应和寿命.
- 为了比较肌肉内腺病毒载体疫苗 (Ad5-nCoV),气溶液Ad5-nCoV,复合蛋白子单位疫苗 (ZF2001) 和无活化疫苗 (CoronaVac) 作为助推剂.
主要方法:
- 进行了一项非随机的,开放的,并行控制的第四期试验.
- 参与者在增强剂注射之前接受了两剂非活化COVID-19疫苗.
- 随着时间的推移,评估了免疫反应,包括中和抗体和T细胞活性.
主要成果:
- 气溶液中的Ad5-nCoV诱导了对Omicron变种和强大的IFNgT细胞反应的最强和最持久的中和活性.
- 在空气中Ad5-nCoV增强后,观察到显著的SARS-CoV-2特异性粘膜IgA反应.
- 在六个月后,与其他助推剂相比,气溶Ad5-nCoV助推剂显示出优异的Omicron BA.4/5特异性中和抗体标位和血清转化率.
结论:
- 气溶液中的Ad5-nCoV显示出作为有效的助推策略对抗Omicron BA.4/5变种的潜力.
- 由气溶液中的Ad5-nCoV产生的独特的粘膜免疫反应可能会提供增强的保护.
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